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1. Hot-spots around Sagittarius A*: Joint fits to astrometry and polarimetry

Author: Yfantis, A. I., Wielgus, M., and Mościbrodzka, M. A.
Subjects: Astrophysics - High Energy Astrophysical Phenomena
Abstract: Observations of Sagittarius A* (Sgr A*) in near-infrared (NIR) show irregular flaring activity. Flares coincide with astrometric rotation of brightness centroid and with looping patterns in fractional linear polarization. These signatures can be explained with a model of a bright hot-spot, transiently orbiting the black hole. We extend the capabilities of the existing algorithms to perform parameter estimation and model comparison in the Bayesian framework using NIR observations from the GRAVITY instrument, and simultaneously fitting to the astrometric and polarimetric data. Using the numerical radiative transfer code ipole, we defined several geometric models describing a hot-spot orbiting Sgr A*, threaded with magnetic field, and emitting synchrotron radiation. We then explored the posterior space of our models in the Bayesian framework with a nested sampling code dynesty. We have used 11 models to sharpen our understanding of the importance of various aspects of the orbital model, such as non-Keplerian motion, hot-spot size, and off-equatorial orbit. All considered models converge to realizations that fit the data well, but the equatorial super-Keplerian model is favored by the currently available NIR dataset. We have inferred an inclination of ~ 155 deg, which corroborates previous estimates, a preferred period of ~ 70 minutes, and an orbital radius of ~ 12 gravitational radii with the orbital velocity of ~ 1.3 times the Keplerian value. A hot-spot of a diameter smaller than 5 gravitational radii is favored. Black hole spin is not constrained well.
Published: 2024

2. First VLBI detection of Fornax A

Author: Paraschos, G. F., Wielgus, M., Benke, P., Mpisketzis, V., Rösch, F., Dasyra, K., Ros, E., Kadler, M., Ojha, R., Edwards, P. G., Hyland, L., Quick, J. F. H., and Weston, S.
Subjects: Astrophysics - Astrophysics of Galaxies, Astrophysics - High Energy Astrophysical Phenomena
Abstract: Radio galaxies harbouring jetted active galactic nuclei are a frequent target of very-long-baseline interferometry (VLBI) because they play an essential role in exploring how jets form and propagate. Hence, only few have not been detected with VLBI yet; Fornax A is one of the most famous examples. Here we present the first detection of the compact core region of Fornax A with VLBI. At 8.4 GHz the faint core is consistent with an unresolved point source. We constrained its flux density to be $S_0 = 47.5-62.3\,\textrm{mJy}$ and its diameter to be $D^\textrm{min}_0 \leq 70\,\mu\textrm{as}$. The high values of the measured brightness temperature ($T_\textrm{B} \gtrsim 10^{11}\,\textrm{K}$) imply that the observed radiation is of non-thermal origin, likely associated with the synchrotron emission from the active galactic nucleus. We also investigated the possibility of a second radio source being present within the field of view. Adding a second Gaussian component to the geometrical model-fit does not significantly improve the quality of the fit and we, therefore, conclude that our detection corresponds to the compact core of Fornax A. Analysis of the non-trivial closure phases provides evidence for the detection of more extended flux density, on the angular scale of $\sim4000\,\mu\textrm{as}$. Finally, the fractional circular polarisation of the core is consistent with zero, with a conservative upper limit being $m_\textrm{circ} \leq 4\%$., Comment: 4 pages, 2 figures, accepted for publication in A&A
Published: 2024
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3. Ordered magnetic fields around the 3C 84 central black hole

Author: Paraschos, G. F., Kim, J. -Y., Wielgus, M., Röder, J., Krichbaum, T. P., Ros, E., Agudo, I., Myserlis, I., Moscibrodzka, M., Traianou, E., Zensus, J. A., Blackburn, L., Chan, C. -K., Issaoun, S., Janssen, M., Johnson, M. D., Fish, V. L., Akiyama, K., Alberdi, A., Alef, W., Algaba, J. C., Anantua, R., Asada, K., Azulay, R., Bach, U., Baczko, A. -K., Ball, D., Baloković, M., Barrett, J., Bauböck, M., Benson, B. A., Bintley, D., Blundell, R., Bouman, K. L., Bower, G. C., Boyce, H., Bremer, M., Brinkerink, C. D., Brissenden, R., Britzen, S., Broderick, A. E., Broguiere, D., Bronzwaer, T., Bustamante, S., Byun, D. -Y., Carlstrom, J. E., Ceccobello, C., Chael, A., Chang, D. O., Chatterjee, K., Chatterjee, S., Chen, M. T., Chen, Y., Cheng, X., Cho, I., Christian, P., Conroy, N. S., Conway, J. E., Cordes, J. M., Crawford, T. M., Crew, G. B., Cruz-Osorio, A., Cui, Y., Dahale, R., Davelaar, J., De Laurentis, M., Deane, R., Dempsey, J., Desvignes, G., Dexter, J., Dhruv, V., Doeleman, S. S., Dougal, S., Dzib, S. A., Eatough, R. P., Emami, R., Falcke, H., Farah, J., Fomalont, E., Ford, H. A., Foschi, M., Fraga-Encinas, R., Freeman, W. T., Friberg, P., Fromm, C. M., Fuentes, A., Galison, P., Gammie, C. F., García, R., Gentaz, O., Georgiev, B., Goddi, C., Gold, R., Gómez-Ruiz, A. I., Gómez, J. L., Gu, M., Gurwell, M., Hada, K., Haggard, D., Haworth, K., Hecht, M. H., Hesper, R., Heumann, D., Ho, L. C., Ho, P., Honma, M., Huang, C. L., Huang, L., Hughes, D. H., Ikeda, S., Impellizzeri, C. M. V., Inoue, M., James, D. J., Jannuzi, B. T., Jeter, B., Jaing, W., Jiménez-Rosales, A., Jorstad, S., Joshi, A. V., Jung, T., Karami, M., Karuppusamy, R., Kawashima, T., Keating, G. K., Kettenis, M., Kim, D. -J., Kim, J., Kino, M., Koay, J. Y., Kocherlakota, P., Kofuji, Y., Koch, P. M., Koyama, S., Kramer, C., Kramer, J. A., Kramer, M., Kuo, C. -Y., La Bella, N., Lauer, T. R., Lee, D., Lee, S. -S., Leung, P. K., Levis, A., Li, Z., Lico, R., Lindahl, G., Lindqvist, M., Lisakov, M., Liu, J., Liu, K., Liuzzo, E., Lo, W. -P., Lobanov, A. P., Loinard, L., Lonsdale, C. J., Lowitz, A. E., Lu, R. -S., MacDonald, N. R., Mao, J., Marchili, N., Markoff, S., Marrone, D. P., Marscher, A. P., Martí-Vidal, I., Matsushita, S., Matthews, L. D., Medeiros, L., Menten, K. M., Michalik, D., Mizuno, I., Mizuno, Y., Moran, J. M., Moriyama, K., Mulaudzi, W., Müller, C., Müller, H., Mus, A., Musoke, G., Nadolski, A., Nagai, H., Nagar, N. M., Nakamura, M., Narayanan, G., Natarajan, I., Nathanail, A., Fuentes, S. Navarro, Neilsen, J., Neri, R., Ni, C., Noutsos, A., Nowak, M. A., Oh, J., Okino, H., Olivares, H., Ortiz-León, G. N., Oyama, T., Özel, F., Palumbo, D. C. M., Park, J., Parsons, H., Patel, N., Pen, U. -L., Piétu, V., Plambeck, R., PopStefanija, A., Porth, O., Pötzl, F. M., Prather, B., Preciado-López, J. A., Psaltis, D., Pu, H. -Y., Ramakrishnan, V., Rao, R., Rawlings, M. G., Raymond, A. W., Rezzolla, L., Ricarte, A., Ripperda, B., Roelofs, F., Rogers, A., Romero-Cañizales, C., Roshanineshat, A., Rottmann, H., Roy, A. L., Ruiz, I., Ruszczyk, C., Rygl, K. L. J., Sánchez, S., Sánchez-Argüelles, D., Sánchez-Portal, M., Sasada, M., Satapathy, K., Savolainen, T., Schloerb, F. P., Schonfeld, J., Schuster, K., Shao, L., Shen, Z., Small, D., Sohn, B. W., SooHoo, J., Salas, L. D. Sosapanta, Souccar, K., Sun, H., Tazaki, F., Tetarenko, A. J., Tiede, P., Tilanus, R. P. J., Titus, M., Torne, P., Toscano, T., Trent, T., Trippe, S., Turk, M., van Bemmel, I., van Langevelde, H. J., van Rossum, D. R., Vos, J., Wagner, J., Ward-Thompson, D., Wardle, J., Washington, J. E., Weintroub, J., Wharton, R., Wiik, K., Witzel, G., Wondrak, M. F., Wong, G. N., Wu, Q., Yadlapalli, N., Yamaguchi, P., Yfantis, A., Yoon, D., Young, A., Young, K., Younsi, Z., Yu, W., Yuan, F., Yuan, Y. -F., Zhang, S., Zhao, G. Y., and Zhao, S. -S.
Subjects: Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Astrophysics of Galaxies
Abstract: 3C84 is a nearby radio source with a complex total intensity structure, showing linear polarisation and spectral patterns. A detailed investigation of the central engine region necessitates the use of VLBI above the hitherto available maximum frequency of 86GHz. Using ultrahigh resolution VLBI observations at the highest available frequency of 228GHz, we aim to directly detect compact structures and understand the physical conditions in the compact region of 3C84. We used EHT 228GHz observations and, given the limited (u,v)-coverage, applied geometric model fitting to the data. We also employed quasi-simultaneously observed, multi-frequency VLBI data for the source in order to carry out a comprehensive analysis of the core structure. We report the detection of a highly ordered, strong magnetic field around the central, SMBH of 3C84. The brightness temperature analysis suggests that the system is in equipartition. We determined a turnover frequency of $\nu_m=(113\pm4)$GHz, a corresponding synchrotron self-absorbed magnetic field of $B_{SSA}=(2.9\pm1.6)$G, and an equipartition magnetic field of $B_{eq}=(5.2\pm0.6)$G. Three components are resolved with the highest fractional polarisation detected for this object ($m_\textrm{net}=(17.0\pm3.9)$%). The positions of the components are compatible with those seen in low-frequency VLBI observations since 2017-2018. We report a steeply negative slope of the spectrum at 228GHz. We used these findings to test models of jet formation, propagation, and Faraday rotation in 3C84. The findings of our investigation into different flow geometries and black hole spins support an advection-dominated accretion flow in a magnetically arrested state around a rapidly rotating supermassive black hole as a model of the jet-launching system in the core of 3C84. However, systematic uncertainties due to the limited (u,v)-coverage, however, cannot be ignored., Comment: 15 pages, 6 figures, published in A&A
Published: 2024
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4. Fitting the light curves of Sagittarius A* with a hot-spot model

Author: Yfantis, A. I., Mościbrodzka, M. A., Wielgus, M., Vos, J. T., and Jimenez-Rosales, A.
Subjects: Astrophysics - High Energy Astrophysical Phenomena
Abstract: Sagittarius A* exhibits frequent flaring activity across the electromagnetic spectrum. Signatures of an orbiting hot spot have been identified in the polarized millimeter wavelength light curves observed with ALMA in 2017 immediately after an X-ray flare. The nature of these hot spots remains uncertain. We expanded existing theoretical hot-spot models created to describe the Sgr A* polarized emission at millimeter wavelengths. We sampled the posterior space, identifying best-fitting parameters and characterizing uncertainties. Using the numerical radiative transfer code ipole, we defined a semi-analytical model describing a ball of plasma orbiting Sgr A*, threaded with a magnetic field and emitting synchrotron radiation. We then explored the posterior space in the Bayesian framework of dynesty. We fit the static background emission separately, using a radiatively inefficient accretion flow model. We considered eight models with a varying level of complexity, distinguished by choices regarding dynamically important cooling, non-Keplerian motion, and magnetic field polarity. All models converge to realizations that fit the data, but one model without cooling, non-Keplerian motion, and magnetic field pointing toward us improved the fit significantly and also matched the observed circular polarization. Our models represent observational data well and allow testing various effects in a systematic manner. From our analysis, we have inferred an inclination of $155-160$ deg, which corroborates previous estimates, a preferred period of 90 minutes, and an orbital radius of $9-12$ gravitational radii. Our non-Keplerian models indicate a preference for an orbital velocity of $0.6-0.9$ times the Keplerian value. Last, all our models agree on a high dimensionless spin value ($a_{*}>0.8$), but the impact of spin on the corresponding light curves is subdominant with respect to other parameters.
Published: 2023
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5. Polarized signatures of orbiting hot spots: special relativity impact and probe of spacetime curvature

Author: Vincent, F. H., Wielgus, M., Aimar, N., Paumard, T., and Perrin, G.
Subjects: Astrophysics - High Energy Astrophysical Phenomena, General Relativity and Quantum Cosmology
Abstract: [Abridged] Context. The Galactic Center supermassive black hole is well known to exhibit transient peaks of flux density on a daily basis across the spectrum. Recent infrared and millimeter observations have strengthened the case for the association between these flares and circular orbital motion in the vicinity of the event horizon. The strongly polarized synchrotron radiation associated with these events leads to specific observables called QU loops, that is, looping motion in the Stokes QU plane of linear polarization. Aims. We want to deepen the understanding of the QU loops associated with orbiting hot spots. We compute such loops in Minkowski and Schwarzschild spacetimes in order to determine which aspects of the observed patterns are due to special- or general-relativistic phenomena. Results. We show that QU loops in Minkowski spacetime at low or moderate inclination i < 45 deg share all qualitative features of Schwarzschild QU loops: there exist QU loops for all setups considered (including face-on view and vertical magnetic field), there may be one or two QU loops per orbital period for a vertical magnetic field configuration, there are always two QU loops in case of a toroidal magnetic field. We provide analytical formulas in Minkowski spacetime to explain the details of this behavior. Moreover, we analyze the flux variation of the hot spot and show that it is dictated either by the angular dependence of the radiative transfer coefficients, or by relativistic beaming. In the former case, this can lead to extreme flux ratios even at moderate inclination. Finally, we highlight the increasing mirror asymmetry of the Schwarzschild QU track with increasing inclination and show that this behavior is a specific Schwarzschild feature caused by light bending., Comment: 20 pages, 14 figures, submitted to A&A
Published: 2023

6. Polarimetry and Astrometry of NIR Flares as Event Horizon Scale, Dynamical Probes for the Mass of Sgr A*

Author: The GRAVITY Collaboration, Abuter, R., Aimar, N., Seoane, P. Amaro, Amorim, A., Bauböck, M., Berger, J. P., Bonnet, H., Bourdarot, G., Brandner, W., Cardoso, V., Clénet, Y., Davies, R., de Zeeuw, P. T., Dexter, J., Drescher, A., Eckart, A., Eisenhauer, F., Feuchtgruber, H., Finger, G., Schreiber, N. M. Förster, Foschi, A., Garcia, P., Gao, F., Gelles, Z., Gendron, E., Genzel, R., Gillessen, S., Hartl, M., Haubois, X., Haussmann, F., Heißel, G., Henning, T., Hippler, S., Horrobin, M., Jochum, L., Jocou, L., Kaufer, A., Kervella, P., Lacour, S., Lapeyrère, V., Bouquin, J. -B. Le, Léna, P., Lutz, D., Mang, F., More, N., Ott, T., Paumard, T., Perraut, K., Perrin, G., Pfuhl, O., Rabien, S., Ribeiro, D. C., Bordoni, M. Sadun, Scheithauer, S., Shangguan, J., Shimizu, T., Stadler, J., Straub, O., Straubmeier, C., Sturm, E., Tacconi, L. J., Vincent, F., von Fellenberg, S., Widmann, F., Wielgus, M., Wieprecht, E., Wiezorrek, E., and Woillez, J.
Subjects: Astrophysics - Astrophysics of Galaxies, Astrophysics - High Energy Astrophysical Phenomena, General Relativity and Quantum Cosmology
Abstract: We present new astrometric and polarimetric observations of flares from Sgr A* obtained with GRAVITY, the near-infrared interferometer at ESO's Very Large Telescope Interferometer (VLTI), bringing the total sample of well-covered astrometric flares to four and polarimetric ones to six, where we have for two flares good coverage in both domains. All astrometric flares show clockwise motion in the plane of the sky with a period of around an hour, and the polarization vector rotates by one full loop in the same time. Given the apparent similarities of the flares, we present a common fit, taking into account the absence of strong Doppler boosting peaks in the light curves and the EHT-measured geometry. Our results are consistent with and significantly strengthen our model from 2018: We find that a) the combination of polarization period and measured flare radius of around nine gravitational radii ($9 R_g \approx 1.5 R_{ISCO}$, innermost stable circular orbit) is consistent with Keplerian orbital motion of hot spots in the innermost accretion zone. The mass inside the flares' radius is consistent with the $4.297 \times 10^6 \; \text{M}_\odot$ measured from stellar orbits at several thousand $R_g$. This finding and the diameter of the millimeter shadow of Sgr A* thus support a single black hole model. Further, b) the magnetic field configuration is predominantly poloidal (vertical), and the flares' orbital plane has a moderate inclination with respect to the plane of the sky, as shown by the non-detection of Doppler-boosting and the fact that we observe one polarization loop per astrometric loop. Moreover, c) both the position angle on sky and the required magnetic field strength suggest that the accretion flow is fueled and controlled by the winds of the massive, young stars of the clockwise stellar disk 1-5 arcsec from Sgr A*, in agreement with recent simulations., Comment: 10 pages, 12 figures. Accepted for publication in A&A
Published: 2023
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7. Persistent Non-Gaussian Structure in the Image of Sagittarius A* at 86 GHz

Author: Issaoun, S., Johnson, M. D., Blackburn, L., Broderick, A., Tiede, P., Wielgus, M., Doeleman, S. S., Falcke, H., Akiyama, K., Bower, G. C., Brinkerink, C. D., Chael, A., Cho, I., Gómez, J. L., Hernández-Gómez, A., Hughes, D., Kino, M., Krichbaum, T. P., Liuzzo, E., Loinard, L., Markoff, S., Marrone, D. P., Mizuno, Y., Moran, J. M., Pidopryhora, Y., Ros, E., Rygl, K., Shen, Z. -Q., and Wagner, J.
Subjects: Astrophysics - Astrophysics of Galaxies, Astrophysics - High Energy Astrophysical Phenomena
Abstract: Observations of the Galactic Center supermassive black hole Sagittarius A* (Sgr A*) with very long baseline interferometry (VLBI) are affected by interstellar scattering along our line of sight. At long radio observing wavelengths ($\gtrsim1\,$cm), the scattering heavily dominates image morphology. At 3.5 mm (86 GHz), the intrinsic source structure is no longer sub-dominant to scattering, and thus the intrinsic emission from Sgr A* is resolvable with the Global Millimeter VLBI Array (GMVA). Long-baseline detections to the phased Atacama Large Millimeter/submillimeter Array (ALMA) in 2017 provided new constraints on the intrinsic and scattering properties of Sgr A*, but the stochastic nature of the scattering requires multiple observing epochs to reliably estimate its statistical properties. We present new observations with the GMVA+ALMA, taken in 2018, which confirm non-Gaussian structure in the scattered image seen in 2017. In particular, the ALMA-GBT baseline shows more flux density than expected for an anistropic Gaussian model, providing a tight constraint on the source size and an upper limit on the dissipation scale of interstellar turbulence. We find an intrinsic source extent along the minor axis of $\sim100\,\mu$as both via extrapolation of longer wavelength scattering constraints and direct modeling of the 3.5 mm observations. Simultaneously fitting for the scattering parameters, we find an at-most modestly asymmetrical (major-to-minor axis ratio of $1.5\pm 0.2$) intrinsic source morphology for Sgr A*., Comment: 18 pages, 10 figures, submitted to ApJ
Published: 2021
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8. SYMBA: An end-to-end VLBI synthetic data generation pipeline

Author: Roelofs, F., Janssen, M., Natarajan, I., Deane, R., Davelaar, J., Olivares, H., Porth, O., Paine, S. N., Bouman, K. L., Tilanus, R. P. J., van Bemmel, I. M., Falcke, H., Akiyama, K., Alberdi, A., Alef, W., Asada, K., Azulay, R., Baczko, A., Ball, D., Baloković, M., Barrett, J., Bintley, D., Blackburn, L., Boland, W., Bower, G. C., Bremer, M., Brinkerink, C. D., Brissenden, R., Britzen, S., Broderick, A. E., Broguiere, D., Bronzwaer, T., Byun, D., Carlstrom, J. E., Chael, A., Chan, C., Chatterjee, S., Chatterjee, K., Chen, M., Chen, Y., Cho, I., Christian, P., Conway, J. E., Cordes, J. M., Crew, G. B., Cui, Y., De Laurentis, M., Dempsey, J., Desvignes, G., Dexter, J., Doeleman, S. S., Eatough, R. P., Fish, V. L., Fomalont, E., Fraga-Encinas, R., Friberg, P., Fromm, C. M., Gómez, J. L., Galison, P., Gammie, C. F., García, R., Gentaz, O., Georgiev, B., Goddi, C., Gold, R., Gu, M., Gurwell, M., Hada, K., Hecht, M. H., Hesper, R., Ho, L. C., Ho, P., Honma, M., Huang, C. L., Huang, L., Hughes, D. H., Ikeda, S., Inoue, M., Issaoun, S., James, D. J., Jannuzi, B. T., Jeter, B., Jiang, W., Johnson, M. D., Jorstad, S., Jung, T., Karami, M., Karuppusamy, R., Kawashima, T., Keating, G. K., Kettenis, M., Kim, J., Kino, M., Koay, J. Yi, Koch, P. M., Koyama, S., Kramer, M., Kramer, C., Krichbaum, T. P., Kuo, C., Lauer, T. R., Lee, S., Li, Y., Li, Z., Lindqvist, M., Lico, R., Liu, K., Liuzzo, E., Lo, W., Lobanov, A. P., Loinard, L., Lonsdale, C., Lu, R., MacDonald, N. R., Mao, J., Markoff, S., Marrone, D. P., Marscher, A. P., Martí-Vidal, I., Matsushita, S., Matthews, L. D., Medeiros, L., Menten, K. M., Mizuno, Y., Mizuno, I., Moran, J. M., Moriyama, K., Moscibrodzka, M., Müller, C., Nagai, H., Nagar, N. M., Nakamura, M., Narayan, R., Narayanan, G., Neri, R., Ni, C., Noutsos, A., Okino, H., Ortiz-León, G. N., Oyama, T., Özel, F., Palumbo, D. C. M., Patel, N., Pen, U., Pesce, D. W., Piétu, V., Plambeck, R., PopStefanija, A., Prather, B., Preciado-López, J. A., Psaltis, D., Pu, H., Ramakrishnan, V., Rao, R., Rawlings, M. G., Raymond, A. W., Rezzolla, L., Ripperda, B., Rogers, A., Ros, E., Rose, M., Roshanineshat, A., Rottmann, H., Roy, A. L., Ruszczyk, C., Ryan, B. R., Rygl, K. L. J., Sánchez, S., Sánchez-Arguelles, D., Sasada, M., Savolainen, T., Schloerb, F. Peter, Schuster, K., Shao, L., Shen, Z., Small, D., Sohn, B. Won, SooHoo, J., Tazaki, F., Tiede, P., Titus, M., Toma, K., Torne, P., Trent, T., Trippe, S., Tsuda, S., van Langevelde, H. J., van Rossum, D. R., Wagner, J., Wardle, J., Ward-Thompson, D., Weintroub, J., Wex, N., Wharton, R., Wielgus, M., Wong, G. N., Wu, Q., Young, A., Young, K., Younsi, Z., Yuan, F., Yuan, Y., Zensus, J. A., Zhao, G., Zhao, S., and Zhu, Z.
Subjects: Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - High Energy Astrophysical Phenomena
Abstract: Realistic synthetic observations of theoretical source models are essential for our understanding of real observational data. In using synthetic data, one can verify the extent to which source parameters can be recovered and evaluate how various data corruption effects can be calibrated. These studies are important when proposing observations of new sources, in the characterization of the capabilities of new or upgraded instruments, and when verifying model-based theoretical predictions in a comparison with observational data. We present the SYnthetic Measurement creator for long Baseline Arrays (SYMBA), a novel synthetic data generation pipeline for Very Long Baseline Interferometry (VLBI) observations. SYMBA takes into account several realistic atmospheric, instrumental, and calibration effects. We used SYMBA to create synthetic observations for the Event Horizon Telescope (EHT), a mm VLBI array, which has recently captured the first image of a black hole shadow. After testing SYMBA with simple source and corruption models, we study the importance of including all corruption and calibration effects. Based on two example general relativistic magnetohydrodynamics (GRMHD) model images of M87, we performed case studies to assess the attainable image quality with the current and future EHT array for different weather conditions. The results show that the effects of atmospheric and instrumental corruptions on the measured visibilities are significant. Despite these effects, we demonstrate how the overall structure of the input models can be recovered robustly after performing calibration steps. With the planned addition of new stations to the EHT array, images could be reconstructed with higher angular resolution and dynamic range. In our case study, these improvements allowed for a distinction between a thermal and a non-thermal GRMHD model based on salient features in reconstructed images., Comment: 20 pages, 15 figures, accepted for publication in A&A
Published: 2020
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9. Geometric modeling of M87* as a Kerr black hole or a non-Kerr compact object

Author: Vincent, F. H., Wielgus, M., Abramowicz, M. A., Gourgoulhon, E., Lasota, J. -P., Paumard, T., and Perrin, G.
Subjects: General Relativity and Quantum Cosmology, Astrophysics - High Energy Astrophysical Phenomena
Abstract: Context. The Event Horizon Telescope (EHT) collaboration recently obtained first images of the surroundings of the supermassive compact object M87* at the center of the galaxy M87. Aims. We want to develop a simple analytic disk model for the accretion flow of M87*. Compared to general-relativistic magnetohydrodynamic (GRMHD) models, it has the advantage of being independent of the turbulent character of the flow, and controlled by only few easy-to-interpret, physically meaningful parameters. We want to use this model to predict the image of M87* assuming that it is either a Kerr black hole, or an alternative compact object. Methods. We compute the synchrotron emission from the disk model and propagate the resulting light rays to the far-away observer by means of relativistic ray tracing. Such computations are performed assuming different spacetimes (Kerr, Minkowski, non-rotating ultracompact star, rotating boson star or Lamy spinning wormhole). We perform numerical fits of these models to the EHT data. Results. We discuss the highly-lensed features of Kerr images and show that they are intrinsically linked to the accretion-flow properties, and not only to gravitation. This fact is illustrated by the notion of secondary ring that we introduce. Our model of spinning Kerr black hole predicts mass and orientation consistent with the EHT interpretation. The non-Kerr images result in similar quality of the numerical fits and may appear very similar to Kerr images, once blurred to the EHT resolution. This implies that a strong test of the Kerr spacetime may be out of reach with the current data. We notice that future developments of the EHT could alter this situation. Conclusions. Our results show the importance of studying alternatives to the Kerr spacetime in order to be able to test the Kerr paradigm unambiguously., Comment: 22 pages, 21 figures, accepted by A&A - see new Fig. 5
Published: 2020
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10. Multi-wavelength torus-jet model for Sgr~A*

Author: Vincent, F. H., Abramowicz, M. A., Zdziarski, A. A., Wielgus, M., Paumard, T., Perrin, G., and Straub, O.
Subjects: Astrophysics - High Energy Astrophysical Phenomena, General Relativity and Quantum Cosmology
Abstract: Context. The properties of the accretion flow surrounding the supermassive central black hole of the Galaxy, Sgr A*, will be scrutinized by the new-generation instrument GRAVITY and the Event Horizon Telescope (EHT). Developing fast, robust, and simple models of such flows is thus important and very timely. Aims. We want to model the quiescent emission of Sgr A* from radio to mid-infrared by considering a magnetized compact torus and an extended jet. Results. We find perfect spectral fit both for face-on and edge-on views. These best fits give parameters values very close to that found by the most recent numerical simulations, which are much more complex than our model. The intrinsic radio size of Sgr A* is found to be in reasonable agreement with the centimetric observed constraints. Our best-fit infrared spectral index is in perfect agreement with the latest constraints. Our emission region at 1.3 mm, although larger than the Doeleman et al. (2008) Gaussian best-fit, does contain bright features at the 40 microarcsec scale. EHT-reconstructed images show that torus/jet-specific features persist after the reconstruction procedure, and that these features are sensitive to inclination. Conclusions. The main interest of our model is to give a simple and fast model of the quiescent state of Sgr A*, which gives extremely similar results as compared to state-of-the-art numerical simulations. Our model is easy to use and we publish all the material necessary to reproduce our spectra and images, so that anyone interested can use our results rather straightforwardly. We hope that such a public tool can be useful in the context of the recent and near-future GRAVITY and EHT results. Our model can in particular be easily used to test alternative compact objects models, or alternative gravity theories. The main limitation of our model is that we do not yet treat the X-ray emission., Comment: 12 pages, 8 figures, accepted by A&A
Published: 2019
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11. The Size, Shape, and Scattering of Sagittarius A* at 86 GHz: First VLBI with ALMA

Author: Issaoun, S., Johnson, M. D., Blackburn, L., Brinkerink, C. D., Mościbrodzka, M., Chael, A., Goddi, C., Martí-Vidal, I., Wagner, J., Doeleman, S. S., Falcke, H., Krichbaum, T. P., Akiyama, K., Bach, U., Bouman, K. L., Bower, G. C., Broderick, A., Cho, I., Crew, G., Dexter, J., Fish, V., Gold, R., Gómez, J. L., Hada, K., Hernández-Gómez, A., Janßen, M., Kino, M., Kramer, M., Loinard, L., Lu, R. -S., Markoff, S., Marrone, D. P., Matthews, L. D., Moran, J. M., Müller, C., Roelofs, F., Ros, E., Rottmann, H., Sanchez, S., Tilanus, R. P. J., de Vicente, P., Wielgus, M., Zensus, J. A., and Zhao, G. -Y.
Subjects: Astrophysics - High Energy Astrophysical Phenomena
Abstract: The Galactic Center supermassive black hole Sagittarius A* (Sgr A*) is one of the most promising targets to study the dynamics of black hole accretion and outflow via direct imaging with very long baseline interferometry (VLBI). At 3.5 mm (86 GHz), the emission from Sgr A* is resolvable with the Global Millimeter VLBI Array (GMVA). We present the first observations of Sgr A* with the phased Atacama Large Millimeter/submillimeter Array (ALMA) joining the GMVA. Our observations achieve an angular resolution of ~87{\mu}as, improving upon previous experiments by a factor of two. We reconstruct a first image of the unscattered source structure of Sgr A* at 3.5 mm, mitigating effects of interstellar scattering. The unscattered source has a major axis size of 120 $\pm$ 34{\mu}as (12 $\pm$ 3.4 Schwarzschild radii), and a symmetrical morphology (axial ratio of 1.2$^{+0.3}_{-0.2}$), which is further supported by closure phases consistent with zero within 3{\sigma}. We show that multiple disk-dominated models of Sgr A* match our observational constraints, while the two jet-dominated models considered are constrained to small viewing angles. Our long-baseline detections to ALMA also provide new constraints on the scattering of Sgr A*, and we show that refractive scattering effects are likely to be weak for images of Sgr A* at 1.3 mm with the Event Horizon Telescope. Our results provide the most stringent constraints to date for the intrinsic morphology and refractive scattering of Sgr A*, demonstrating the exceptional contribution of ALMA to millimeter VLBI., Comment: Accepted for publication in ApJ
Published: 2019
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12. Atmospheric oscillations provide simultaneous measurement of neutron star mass and radius

Author: Bollimpalli, D. A., Wielgus, M., Abarca, D., and Kluźniak, W.
Subjects: Astrophysics - High Energy Astrophysical Phenomena
Abstract: Neutron stars with near-Eddington observable luminosities were shown to harbor levitating atmospheres, suspended above their surface. We report a new method to simultaneously measure the mass and radius of a neutron star based on oscillations of such atmospheres. In this paper, we present an analytic derivation of a family of relativistic, oscillatory, spherically symmetric eigenmodes of the optically and geometrically thin levitating atmospheres, including the damping effects induced by the radiation drag. We discover characteristic maxima in the frequencies of the damped oscillations and show that using the frequency maxima, one can estimate mass and radius of the neutron star, given the observed frequency and the corresponding luminosity of the star during the X-ray burst. Thus, our model provides a new way to probe the stellar parameters. We also show that the ratio of any two undamped eigenfrequencies depends only on the adiabatic index of the atmosphere, while for the damped eigenfrequencies, this ratio varies with the luminosity. The damping coefficient is independent of the mode number of the oscillations. Signatures of these atmospheres' dynamics will be reflected in the source's X-ray light curves., Comment: 14 pages, 11 figures
Published: 2018
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13. Radiative, two-temperature simulations of low luminosity black hole accretion flows in general relativity

Author: Sadowski, A., Wielgus, M., Narayan, R., Abarca, D., McKinney, J. C., and Chael, A.
Subjects: Astrophysics - High Energy Astrophysical Phenomena
Abstract: We present a numerical method which evolves a two-temperature, magnetized, radiative, accretion flow around a black hole, within the framework of general relativistic radiation magnetohydrodynamics. As implemented in the code KORAL, the gas consists of two sub-components -- ions and electrons -- which share the same dynamics but experience independent, relativistically consistent, thermodynamical evolution. The electrons and ions are heated independently according to a standard prescription from the literature for magnetohydrodynamical turbulent dissipation. Energy exchange between the particle species via Coulomb collisions is included. In addition, electrons gain and lose energy and momentum by absorbing and emitting synchrotron and bremsstrahlung radiation, and through Compton scattering. All evolution equations are handled within a fully covariant framework in the relativistic fixed-metric spacetime of the black hole. Numerical results are presented for five models of low luminosity black hole accretion. In the case of a model with a mass accretion rate $\dot{M}\sim10^{-8} \dot M_{\rm Edd}$, we find that radiation has a negligible effect on either the dynamics or the thermodynamics of the accreting gas. In contrast, a model with a larger $\dot{M}\sim 4\times 10^{-4} \dot M_{\rm Edd}$ behaves very differently. The accreting gas is much cooler and the flow is geometrically less thick, though it is not quite a thin accretion disk., Comment: 21 pages, improved numerical method, MNRAS, in press
Published: 2016
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14. The electromagnetic afterglows of gravitational waves as a test for Quantum Gravity

Author: Abramowicz, M. A., Bulik, T., Ellis, G. F. R., Meissner, K. A., and Wielgus, M.
Subjects: General Relativity and Quantum Cosmology
Abstract: We argue that if particularly powerful electromagnetic afterglows of the gravitational waves bursts will be observed in the future, this could be used as a strong observational support for some suggested quantum alternatives for black holes (e.g., firewalls and gravastars). A universal absence of powerful afterglows should be taken as a suggestive argument against such hypothetical quantum-gravity objects.
Published: 2016

15. Ordered magnetic fields around the 3C 84 central black hole

Author: Paraschos, G.F., Kim, J.Y., Wielgus, M., Roeder, J., Krichbaum, T.P., Ros, E., Mościbrodzka, M.A., Janssen, M., Brinkerink, C.D., Bronzwaer, T.J.W., Davelaar, J., Falcke, H.D.E., Fraga Encinas, R., Jimenez Rosales, A., La Bella, N., Müller, C., Musoke, Gibwa, Olivares, H., Roelofs, F.J., Tilanus, R.P.J., Rossum, D.R. van, Vos, J.T., Wondrak, M.F., Yfantis, A.I., Young, A., Zhao, S.-S., Paraschos, G.F., Kim, J.Y., Wielgus, M., Roeder, J., Krichbaum, T.P., Ros, E., Mościbrodzka, M.A., Janssen, M., Brinkerink, C.D., Bronzwaer, T.J.W., Davelaar, J., Falcke, H.D.E., Fraga Encinas, R., Jimenez Rosales, A., La Bella, N., Müller, C., Musoke, Gibwa, Olivares, H., Roelofs, F.J., Tilanus, R.P.J., Rossum, D.R. van, Vos, J.T., Wondrak, M.F., Yfantis, A.I., Young, A., and Zhao, S.-S.
Abstract: Contains fulltext : 305293.pdf (Publisher’s version ) (Open Access)
Published: 2024

16. The internal Faraday screen of Sagittarius A*.

Author: Wielgus, M. and Wielgus, M.
Subjects: Astronomy.
Published: 2024

17. Stable, levitating, optically thin atmospheres of Eddington-luminosity neutron stars

Author: Wielgus, M., Kluźniak, W., Sądowski, A., Narayan, R., and Abramowicz, M.
Subjects: Astrophysics - High Energy Astrophysical Phenomena, General Relativity and Quantum Cosmology
Abstract: In general relativity static gaseous atmospheres may be in hydrostatic balance in the absence of a supporting stellar surface, provided that the luminosity is close to the Eddington value. We construct analytic models of optically thin, spherically symmetric shells supported by the radiation pressure of a luminous central body in the Schwarzschild metric. Opacity is assumed to be dominated by Thomson scattering. The inner parts of the atmospheres, where the luminosity locally has supercritical values, are characterized by a density and pressure inversion. The atmospheres are convectively and Rayleigh-Taylor stable, and there is no outflow of gas., Comment: 5 pages, 4 figures
Published: 2015
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18. Escape, capture, and levitation of matter in Eddington outbursts

Author: Stahl, A., Kluźniak, W., Wielgus, M., and Abramowicz, M.
Subjects: Astrophysics - High Energy Astrophysical Phenomena
Abstract: Context: An impulsive increase in luminosity by one half or more of the Eddington value will lead to ejection of all optically thin plasma from Keplerian orbits around the radiating star, if gravity is Newtonian and the Poynting-Robertson drag is neglected. Radiation drag may bring some particles down to the stellar surface. On the other hand, general relativistic calculations show that gravity may be balanced by a sufficiently intense radiation field at a certain distance from the star. Aims: We investigate the motion of test particles around highly luminous stars to determine conditions under which plasma may be ejected from the system. Results: In Einstein's gravity, if the outburst is close to the Eddington luminosity, all test particles orbiting outside an "escape sphere" will be ejected from the system, while all others will be captured from their orbits onto the surface of another sphere, which is well above the stellar surface, and may even be outside the escape sphere, depending on the value of luminosity. Radiation drag will bring all the captured particles to rest on this "Eddington capture sphere," where they will remain suspended in an equilibrium state as long as the local flux of radiation does not change and remains at the effective Eddington value., Comment: 6 pages, 6 figures. To be published in Astronomy and Astrophysics
Published: 2013
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19. The perihelion of Mercury advance and the light bending calculated in (enhanced) Newton's theory

Author: Abramowicz, M. A., Horak, G. F. R. Ellis J., and Wielgus, M.
Subjects: General Relativity and Quantum Cosmology, Astrophysics - High Energy Astrophysical Phenomena
Abstract: We show that results of a simple dynamical gedanken experiment interpreted according to standard Newton's gravitational theory, may reveal that three-dimensional space is curved. The experiment may be used to reconstruct the curved geometry of space, i.e. its non-Euclidean metric. The perihelion of Mercury advance and the light bending calculated from the Poisson equation and the equation of motion in the curved geometry have the correct (observed) values. Independently, we also show that Newtonian gravity theory may be enhanced to incorporate the curvature of three dimensional space by adding an extra equation which links the Ricci scalar with the density of matter. Like in Einstein's general relativity, matter is the source of curvature. In the spherically symmetric (vacuum) case, the metric of space 3gik that follows from this extra equation agrees, to the expected accuracy, with the metric measured by the Newtonian gedanken experiment mentioned above., Comment: arXiv admin note: text overlap with arXiv:1212.0264
Published: 2013
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20. Oscillations of the Eddington Capture Sphere

Author: Wielgus, M., Stahl, A., Abramowicz, M., and Kluźniak, W.
Subjects: Astrophysics - High Energy Astrophysical Phenomena
Abstract: We present a toy model of mildly super-Eddington, optically thin accretion onto a compact star in the Schwarzschild metric, which predicts periodic variations of luminosity when matter is supplied to the system at a constant accretion rate. These are related to the periodic appearance and disappearance of the Eddington Capture Sphere. In the model the frequency is found to vary inversely with the luminosity. If the input accretion rate varies (strictly) periodically, the luminosity variation is quasi-periodic, and the quality factor is inversely proportional to the relative amplitude of mass accretion fluctuations, with its largest value approximately Q= 1/(10 |delta Mdot/Mdot|) attained in oscillations at about 1 to 2 kHz frequencies for a 2 solar mass star.
Published: 2012
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21. The Event Horizon Telescope Image of the Quasar NRAO 530

Author: Jorstad, S., Wielgus, M., Lico, R., Moscibrodzka, M.A., Brinkerink, C.D., Bronzwaer, T.J.W., Davelaar, J., Falcke, H., Fraga-Encinas, R., Jimenez Rosales, A., La Bella, N., Musoke, G.R., Olivares, H., Roelofs, F.J., Tilanus, R.P.J., Rossum, D.R. van, Vos, J.T., Wondrak, M.F., Young, A., Zensus, J.A., Zhang, S., Zhao, S.-S., Jorstad, S., Wielgus, M., Lico, R., Moscibrodzka, M.A., Brinkerink, C.D., Bronzwaer, T.J.W., Davelaar, J., Falcke, H., Fraga-Encinas, R., Jimenez Rosales, A., La Bella, N., Musoke, G.R., Olivares, H., Roelofs, F.J., Tilanus, R.P.J., Rossum, D.R. van, Vos, J.T., Wondrak, M.F., Young, A., Zensus, J.A., Zhang, S., and Zhao, S.-S.
Abstract: Contains fulltext : 289951.pdf (Publisher’s version ) (Open Access)
Published: 2023

22. Key Science Goals for the Next-Generation Event Horizon Telescope

Author: Johnson, M.D., Akiyama, K., Blackburn, L., Bouman, K.L., Broderick, A.E., Cardoso, V., Fender, R.P., Fromm, C.M., Galison, P., Gómez, J.L., Haggard, D., Lister, M.L., Lobanov, A.P., Markoff, S., Narayan, R., Natarajan, P., Nichols, T., Pesce, D.W., Younsi, Z., Chael, A., Chatterjee, K., Chaves, R., Doboszewski, J., Dodson, R., Doeleman, S.S., Elder, J., Fitzpatrick, G., Haworth, K., Houston, J., Issaoun, S., Kovalev, Y.Y., Levis, A., Lico, R., Marcoci, A., Martens, N.C.M., Nagar, N.M., Oppenheimer, A., Palumbo, D.C.M., Ricarte, A., Rioja, M.J., Roelofs, F.J., Thresher, A.C., Tiede, P., Weintroub, J., Wielgus, M., Johnson, M.D., Akiyama, K., Blackburn, L., Bouman, K.L., Broderick, A.E., Cardoso, V., Fender, R.P., Fromm, C.M., Galison, P., Gómez, J.L., Haggard, D., Lister, M.L., Lobanov, A.P., Markoff, S., Narayan, R., Natarajan, P., Nichols, T., Pesce, D.W., Younsi, Z., Chael, A., Chatterjee, K., Chaves, R., Doboszewski, J., Dodson, R., Doeleman, S.S., Elder, J., Fitzpatrick, G., Haworth, K., Houston, J., Issaoun, S., Kovalev, Y.Y., Levis, A., Lico, R., Marcoci, A., Martens, N.C.M., Nagar, N.M., Oppenheimer, A., Palumbo, D.C.M., Ricarte, A., Rioja, M.J., Roelofs, F.J., Thresher, A.C., Tiede, P., Weintroub, J., and Wielgus, M.
Abstract: Contains fulltext : 294453.pdf (Publisher’s version ) (Open Access)
Published: 2023

23. Polarimetry and astrometry of NIR flares as event horizon scale, dynamical probes for the mass of Sgr A*

Author: Abuter, R., Aimar, N., Amaro Seoane, P., Amorim, A., Bauböck, M., Berger, J. P., Bonnet, H., Bourdarot, G., Brandner, W., Cardoso, V., Clénet, Y., Davies, R., De Zeeuw, P. T., Dexter, J., Drescher, A., Eckart, A., Eisenhauer, F., Feuchtgruber, H., Finger, G., Förster Schreiber, N. M., Foschi, A., Garcia, P., Gao, F., Gelles, Z., Gendron, E., Genzel, R., Gillessen, S., Hartl, M., Haubois, X., Haussmann, F., Heißel, G., Henning, T., Hippler, S., Horrobin, M., Jochum, L., Jocou, L., Kaufer, A., Kervella, P., Lacour, S., Lapeyrère, V., Le Bouquin, J.-b., Léna, P., Lutz, D., Mang, F., More, N., Ott, T., Paumard, T., Perraut, K., Perrin, G., Pfuhl, O., Rabien, S., Ribeiro, D. C., Sadun Bordoni, M., Scheithauer, S., Shangguan, J., Shimizu, T., Stadler, J., Straub, O., Straubmeier, C., Sturm, E., Tacconi, L. J., Vincent, F., Von Fellenberg, S., Widmann, F., Wielgus, M., Wieprecht, E., Wiezorrek, E., Woillez, J., Abuter, R., Aimar, N., Amaro Seoane, P., Amorim, A., Bauböck, M., Berger, J. P., Bonnet, H., Bourdarot, G., Brandner, W., Cardoso, V., Clénet, Y., Davies, R., De Zeeuw, P. T., Dexter, J., Drescher, A., Eckart, A., Eisenhauer, F., Feuchtgruber, H., Finger, G., Förster Schreiber, N. M., Foschi, A., Garcia, P., Gao, F., Gelles, Z., Gendron, E., Genzel, R., Gillessen, S., Hartl, M., Haubois, X., Haussmann, F., Heißel, G., Henning, T., Hippler, S., Horrobin, M., Jochum, L., Jocou, L., Kaufer, A., Kervella, P., Lacour, S., Lapeyrère, V., Le Bouquin, J.-b., Léna, P., Lutz, D., Mang, F., More, N., Ott, T., Paumard, T., Perraut, K., Perrin, G., Pfuhl, O., Rabien, S., Ribeiro, D. C., Sadun Bordoni, M., Scheithauer, S., Shangguan, J., Shimizu, T., Stadler, J., Straub, O., Straubmeier, C., Sturm, E., Tacconi, L. J., Vincent, F., Von Fellenberg, S., Widmann, F., Wielgus, M., Wieprecht, E., Wiezorrek, E., and Woillez, J.
Published: 2023

24. A global experiment on motivating social distancing during the COVID-19 pandemic

Author: Legate, N, Ngyuen, T-V, Weinstein, N, Moller, A, Legault, L, Vally, Z, Tajchman, Z, Zsido, AN, Zrimsek, M, Chen, Z, Ziano, I, Gialitaki, Z, Ceary, CD, Jang, Y, Lin, Y, Kunisato, Y, Yamada, Y, Xiao, Q, Jiang, X, Du, X, Yao, E, Ryan, WS, Wilson, JP, Cyrus-Lai, W, Jimenez-Leal, W, Law, W, Unanue, W, Collins, WM, Richard, KL, Vranka, M, Ankushev, V, Schei, V, DePaola, C, Lerche, V, Kovic, V, Križanić, V, Kadreva, VH, Adoric, VC, Tran, US, Yeung, SK, Hassan, W, Houston, R, Machin, MA, Lima, TJS, Ostermann, T, Frizzo, T, Sverdrup, TE, House, T, Gill, T, Fedotov, M, Paltrow, T, Jernsäther, T, Rahman, T, Machin, T, Koptjevskaja-Tamm, M, Hostler, TJ, Ishii, T, Szaszi, B, Adamus, S, Suter, L, von Bormann, SM, Habib, S, Studzinska, A, Stojanovska, D, Janssen, SMJ, Stieger, S, Schulenberg, SE, Tatachari, S, Azouaghe, S, Sorokowski, P, Sorokowska, A, Song, X, Morbée, S, Lewis, S, Sinkolova, S, Grigoryev, D, Drexler, SM, Daches, S, Levine, SL, Geniole, SN, Akter, S, Vračar, S, Massoni, S, Costa, S, Zorjan, S, Sarioguz, E, Izquierdo, SM, Tshonda, SS, Alves, SG, Pöntinen, S, Solas, SÁ, Ordoñez-Riaño, S, Očovaj, SB, Onie, S, Lins, S, Biberauer, T, Çoksan, S, Khumkom, S, Sacakli, A, Ruiz-Fernández, S, Geiger, SJ, FatahModares, S, Walczak, RB, Betlehem, R, Vilar, R, Cárcamo, RA, Ross, RM, McCarthy, R, Ballantyne, T, Westgate, EC, Ryan, RM, Gargurevich, R, Afhami, R, Ren, D, Monteiro, RP, Reips, U-D, Reggev, N, Calin-Jageman, RJ, Pourafshari, R, Oliveira, R, Nedelcheva-Datsova, M, Rahal, R-M, Ribeiro, RR, Radtke, T, Searston, R, Jai-ai, R, Habte, R, Zdybek, P, Chen, S-C, Wajanatinapart, P, Maturan, PLG, Perillo, JT, Isager, PM, Kačmár, P, Macapagal, PM, Maniaci, MR, Szwed, P, Hanel, PHP, Forbes, PAG, Arriaga, P, Paris, B, Parashar, N, Papachristopoulos, K, Correa, PS, Kácha, O, Bernardo, M, Campos, O, Bravo, ON, Galindo-Caballero, OJ, Ogbonnaya, CE, Bialobrzeska, O, Kiselnikova, N, Simonovic, N, Cohen, N, Nock, NL, Hernandez, A, Thogersen-Ntoumani, C, Ntoumanis, N, Johannes, N, Albayrak-Aydemir, N, Say, N, Neubauer, AB, Martin, NI, Levy, N, Torunsky, N, Antwerpen, NV, Doren, NV, Sunami, N, Rachev, NR, Majeed, NM, Schmidt, N-D, Nadif, K, Corral-Frías, NS, Ouherrou, N, Abbas, N, Pantazi, M, Lucas, MY, Vasilev, MR, Victoria Ortiz, M, Butt, MM, Kurfalı, M, Kabir, M, Muda, R, Rivera, MDCMCT, Sirota, M, Seehuus, M, Parzuchowski, M, Toro, M, Hricova, M, Maldonado, MA, Rentzelas, P, Vansteenkiste, M, Metz, MA, Marszalek, M, Karekla, M, Mioni, G, Bosma, MJ, Westerlund, M, Vdovic, M, Bialek, M, Silan, MA, Anne, M, Misiak, M, Gugliandolo, MC, Grinberg, M, Capizzi, M, Espinoza Barría, MF, Kurfali, MA, Mensink, MC, Harutyunyan, M, Khosla, M, Dunn, MR, Korbmacher, M, Adamkovič, M, Ribeiro, MFF, Terskova, M, Hruška, M, Martončik, M, Jansen, M, Voracek, M, Čadek, M, Frias-Armenta, M, Kowal, M, Topor, M, Roczniewska, M, Oosterlinck, M, Kohlová, MB, Paruzel-Czachura, M, Sabristov, M, Romanova, M, Papadatou-Pastou, M, Lund, ML, Antoniadi, M, Magrin, ME, Jones, MV, Li, M, Ortiz, MS, Manavalan, M, Muminov, A, Kossowska, M, Friedemann, M, Wielgus, M, van Hooff, MLM, Varella, MAC, Standage, M, Nicolotti, M, Colloff, MF, Bradford, M, Vaughn, LA, Eudave, L, Vieira, L, Lu, JG, Pineda, LMS, Matos, L, Pérez, LC, Lazarevic, LB, Jaremka, LM, Smit, ES, Kushnir, E, Ferguson, LJ, Anton-Boicuk, L, Lins de Holanda Coelho, G, Ahlgren, L, Liga, F, Levitan, CA, Micheli, L, Gunton, L-A, Volz, L, Stojanovska, M, Boucher, L, Samojlenko, L, Delgado, LGJ, Kaliska, L, Beatrix, L, Warmelink, L, Rojas-Berscia, LM, Yu, K, Wylie, K, Wachowicz, J, Desai, K, Barzykowski, K, Kozma, L, Evans, K, Kirgizova, K, Emmanuel Agesin, BB, Koehn, MA, Wolfe, K, Korobova, T, Morris, K, Klevjer, K, van Schie, K, Vezirian, K, Damnjanović, K, Thommesen, KK, Schmidt, K, Filip, K, Staniaszek, K, Grzech, K, Hoyer, K, Moon, K, Khaobunmasiri, S, Rana, K, Janjić, K, Suchow, JW, Kielińska, J, Cruz Vásquez, JE, Chanal, J, Beitner, J, Vargas-Nieto, JC, Roxas, JCT, Taber, J, Urriago-Rayo, J, Pavlacic, JM, Benka, J, Bavolar, J, Soto, JA, Olofsson, JK, Vilsmeier, JK, Messerschmidt, J, Czamanski-Cohen, J, Waterschoot, J, Moss, JD, Boudesseul, J, Lee, JM, Kamburidis, J, Joy-Gaba, JA, Zickfeld, J, Miranda, JF, Verharen, JPH, Hristova, E, Beshears, JE, Djordjevic, JM, Bosch, J, Valentova, JV, Antfolk, J, Berkessel, JB, Schrötter, J, Urban, J, Röer, JP, Norton, JO, Silva, JR, Pickering, JS, Vintr, J, Uttley, J, Kunst, JR, Ndukaihe, ILG, Iyer, A, Vilares, I, Ivanov, A, Ropovik, I, Sula, I, Sarieva, I, Metin-Orta, I, Prusova, I, Pinto, I, Bozdoc, AI, Almeida, IAT, Pit, IL, Dalgar, I, Zakharov, I, Arinze, AI, Ihaya, K, Stephen, ID, Gjoneska, B, Brohmer, H, Flowe, H, Godbersen, H, Kocalar, HE, Hedgebeth, MV, Chuan-Peng, H, Sharifian, M, Manley, H, Akkas, H, Hajdu, N, Azab, H, Kaminski, G, Nilsonne, G, Anjum, G, Travaglino, GA, Feldman, G, Pfuhl, G, Czarnek, G, Marcu, GM, Hofer, G, Banik, G, Adetula, GA, Bijlstra, G, Verbruggen, F, Kung, FYH, Martela, F, Foroni, F, Forest, J, Singer, G, Muchembled, 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K., Messerschmidt, J., Czamanski-Cohen, J., Waterschoot, J., Moss, J. D., Boudesseul, J., Lee, J. M., Kamburidis, J., Joy-Gaba, J. A., Zickfeld, J., Miranda, J. F., Verharen, J. P. H., Hristova, E., Beshears, J. E., Djordjevic, J. M., Bosch, J., Valentova, J. V., Antfolk, J., Berkessel, J. B., Schrotter, J., Urban, J., Roer, J. P., Norton, J. O., Silva, J. R., Pickering, J. S., Vintr, J., Uttley, J., Kunst, J. R., Ndukaihe, I. L. G., Iyer, A., Vilares, I., Ivanov, A., Ropovik, I., Sula, I., Groyecka-Bernard, A., Sarieva, I., Metin-Orta, I., Prusova, I., Pinto, I., Bozdoc, A. I., Almeida, I. A. T., Pit, I. L., Dalgar, I., Zakharov, I., Arinze, A. I., Ihaya, K., Stephen, I. D., Gjoneska, B., Brohmer, H., Flowe, H., Godbersen, H., Kocalar, H. E., Hedgebeth, M. V., Chuan-Peng, H., Sharifian, M., Manley, H., Akkas, H., Hajdu, N., Azab, H., Kaminski, G., Nilsonne, G., Anjum, G., Travaglino, G. A., Feldman, G., Pfuhl, G., Czarnek, G., Marcu, G. M., Hofer, G., Banik, G., Adetula, G. A., Bijlstra, G., Verbruggen, F., Kung, F. Y. H., Martela, F., Foroni, F., Forest, J., Singer, G., Muchembled, F., Azevedo, F., Mosannenzadeh, F., Marinova, E., Strukelj, E., Etebari, Z., Bradshaw, E. L., Baskin, E., Garcia, E. O. L., Musser, E., Van Steenkiste, I. M. M., Ahn, E. R., Quested, E., Pronizius, E., Jackson, E. A., Manunta, E., Agadullina, E., Sakan, D., Dursun, P., Dujols, O., Dubrov, D., Willis, M., Tumer, M., Beaudry, J. L., Popovic, D., Dunleavy, D., Djamai, I., Krupic, D., Herrera, D., Vega, D., Du, H., Mola, D., Chakarova, D., Davis, W. E., Holford, D. L., Lewis, D. M. G., Vaidis, D. C., Ozery, D. H., Ricaurte, D. Z., Storage, D., Sousa, D., Alvarez, D. S., Boller, D., Rosa, A. D., Dimova, D., Marko, D., Moreau, D., Reeck, C., Correia, R. C., Whitt, C. M., Lamm, C., Solorzano, C. S., Von Bastian, C. C., Sutherland, C. A. M., Ebersole, C. R., Overkott, C., Aberson, C. L., Wang, C., Niemiec, C. P., Karashiali, C., Noone, C., Chiu, F., Picciocchi, C., Brownlow, C., Karaarslan, C., Cellini, N., Esteban-Serna, C., Reyna, C., Ferreyra, C., Batres, C., Li, R., Grano, C., Carpentier, J., Tamnes, C. K., Fu, C. H. Y., Ishkhanyan, B., Bylinina, L., Jaeger, B., Bundt, C., Allred, T. B., Vermote, B. J., Bokkour, A., Bogatyreva, N., Shi, J., Chopik, W. J., Antazo, B., Behzadnia, B., Becker, M., Bayyat, M. M., Cocco, B., Ahmed, A., Chou, W. -L., Barkoukis, V., Hubena, B., Khaoudi, A., Zuro, B., Aczel, B., Baklanova, E., Bai, H., Balci, B. B., Babincak, P., Soenens, B., Dixson, B. J. W., Mokady, A., Kappes, H. B., Atari, M., Szala, A., Szabelska, A., Aruta, J. J. B., Domurat, A., Arinze, N. C., Modena, A., Adiguzel, A., Monajem, A., Ait El Arabi, K., Ozdogru, A. A., Rothbaum, A. O., Torres, A. O., Theodoropoulou, A., Skowronek, A., Urooj, A., Jurkovic, A. P., Singh, A., Kassianos, A. P., Findor, A., Hartanto, A., Landry, A. T., Ferreira, A., Santos, A. C., De La Rosa-Gomez, A., Gourdon-Kanhukamwe, A., Luxon, A. M., Todsen, A. L., Karababa, A., Janak, A., Pilato, A., Bran, A., Tullett, A. M., Kuzminska, A. O., Krafnick, A. J., Department of Industrial Engineering and Management, Aalto-yliopisto, Aalto University, Massey, D., Kurfali, Merve A., Collaboration, Psychological Science Accelerator Self-Determination Theory, FdR overig onderzoek, Persuasive Communication (ASCoR, FMG), and Organizational Psychology
Subjects: behavior change, Coronavirus disease 2019 (COVID-19), 230 Affective Neuroscience, INTENTIONS, L400, self-determination theory, Physical Distancing, Social Sciences, Intention, Ciências Sociais::Psicologia [Domínio/Área Científica], FATIGUE, motivation, PARENTAL PROHIBITION, SDG 3 - Good Health and Well-being, Pandemic, Humans, health communication, MESSAGES, Sociology, Pandemics, METAANALYSIS, COVID-19, Behaviour Change and Well-being, Multidisciplinary, business.industry, Social distance, Public relations, Motivation, INTERNALIZATION, business, BEHAVIOR
Abstract: Significance\ud \ud Communicating in ways that motivate engagement in social distancing remains a critical global public health priority during the COVID-19 pandemic. This study tested motivational qualities of messages about social distancing (those that promoted choice and agency vs. those that were forceful and shaming) in 25,718 people in 89 countries. The autonomy-supportive message decreased feelings of defying social distancing recommendations relative to the controlling message, and the controlling message increased controlled motivation, a less effective form of motivation, relative to no message. Message type did not impact intentions to socially distance, but people’s existing motivations were related to intentions. Findings were generalizable across a geographically diverse sample and may inform public health communication strategies in this and future global health emergencies.\ud \ud \ud \ud Abstract\ud \ud Finding communication strategies that effectively motivate social distancing continues to be a global public health priority during the COVID-19 pandemic. This cross-country, preregistered experiment (n = 25,718 from 89 countries) tested hypotheses concerning generalizable positive and negative outcomes of social distancing messages that promoted personal agency and reflective choices (i.e., an autonomy-supportive message) or were restrictive and shaming (i.e., a controlling message) compared with no message at all. Results partially supported experimental hypotheses in that the controlling message increased controlled motivation (a poorly internalized form of motivation relying on shame, guilt, and fear of social consequences) relative to no message. On the other hand, the autonomy-supportive message lowered feelings of defiance compared with the controlling message, but the controlling message did not differ from receiving no message at all. Unexpectedly, messages did not influence autonomous motivation (a highly internalized form of motivation relying on one’s core values) or behavioral intentions. Results supported hypothesized associations between people’s existing autonomous and controlled motivations and self-reported behavioral intentions to engage in social distancing. Controlled motivation was associated with more defiance and less long-term behavioral intention to engage in social distancing, whereas autonomous motivation was associated with less defiance and more short- and long-term intentions to social distance. Overall, this work highlights the potential harm of using shaming and pressuring language in public health communication, with implications for the current and future global health challenges.
Published: 2022

25. Polarimetric signatures of hot spots in black hole accretion flows

Author: Vos, J., primary, Mościbrodzka, M. A., additional, and Wielgus, M., additional
Published: 2022
Full Text: View/download PDF

26. Photon ring test of the Kerr hypothesis: Variation in the ring shape

Author: Paugnat, H., primary, Lupsasca, A., additional, Vincent, F. H., additional, and Wielgus, M., additional
Published: 2022
Full Text: View/download PDF

27. Images and photon ring signatures of thick disks around black holes

Author: Vincent, F. H., primary, Gralla, S. E., additional, Lupsasca, A., additional, and Wielgus, M., additional
Published: 2022
Full Text: View/download PDF

28. A first search of transients in the Galactic center from 230 GHz ALMA observations

Author: Mus, A., primary, Martí-Vidal, I., additional, Wielgus, M., additional, and Stroud, G., additional
Published: 2022
Full Text: View/download PDF

29. Orbital motion near Sagittarius A*

Author: Wielgus, M., primary, Moscibrodzka, M., additional, Vos, J., additional, Gelles, Z., additional, Martí-Vidal, I., additional, Farah, J., additional, Marchili, N., additional, Goddi, C., additional, and Messias, H., additional
Published: 2022
Full Text: View/download PDF

30. Millimeter Light Curves of Sagittarius A* Observed during the 2017 Event Horizon Telescope Campaign

Author: Wielgus, M., Marchili, N., Martí-Vidal, I., Moscibrodzka, M.A., Brinkerink, C.D., Bronzwaer, T.J.W., Davelaar, J., Falcke, H., Fraga-Encinas, R., Jimenez Rosales, A., La Bella, N., Müller, C., Musoke, G.R., Olivares, H., Roelofs, F.J., Tilanus, R.P.J., Rossum, D.R. van, Vos, J.T., Wondrak, M.F., Young, A., Zhao, G. -Y., Zhao, S.-S., Wielgus, M., Marchili, N., Martí-Vidal, I., Moscibrodzka, M.A., Brinkerink, C.D., Bronzwaer, T.J.W., Davelaar, J., Falcke, H., Fraga-Encinas, R., Jimenez Rosales, A., La Bella, N., Müller, C., Musoke, G.R., Olivares, H., Roelofs, F.J., Tilanus, R.P.J., Rossum, D.R. van, Vos, J.T., Wondrak, M.F., Young, A., Zhao, G. -Y., and Zhao, S.-S.
Abstract: Contains fulltext : 249733.pdf (Publisher’s version ) (Open Access)
Published: 2022

31. Orbital motion near Sagittarius A*: Constraints from polarimetric ALMA observations

Author: Wielgus, M., Moscibrodzka, M.A., Vos, J., Gelles, Z., Marti-Vidal, I, Farah, J., Goddi, C., Messias, H., Wielgus, M., Moscibrodzka, M.A., Vos, J., Gelles, Z., Marti-Vidal, I, Farah, J., Goddi, C., and Messias, H.
Abstract: Contains fulltext : 281840.pdf (Publisher’s version ) (Open Access)
Published: 2022

32. Polarimetric signatures of hot spots in black hole accretion flows

Author: Vos, J.T., Moscibrodzka, M.A., Wielgus, M., Vos, J.T., Moscibrodzka, M.A., and Wielgus, M.
Abstract: Contains fulltext : 286420.pdf (Publisher’s version ) (Open Access)
Published: 2022

33. Resolving the Inner Parsec of the Blazar J1924-2914 with the Event Horizon Telescope

Author: Issaoun, Sara, Wielgus, M., Jorstad, Svetlana, Krichbaum, T.P., Blackburn, L., Jimenez Rosales, A., Moscibrodzka, Monika, Young, A., Davelaar, Jordy, Brinkerink, Christiaan D., Bronzwaer, T.J.W., Falcke, H.D.E., Fraga Encinas, R., Olivares, H., Goddi, C., La Bella, N., Müller, C., Musoke, Gibwa, Roelofs, Freek, Tilanus, Remo P.J., Rossum, D.R. van, Vos, Jesse, Wondrak, Michael, Zhang, Shuo, Zhao, S., Issaoun, Sara, Wielgus, M., Jorstad, Svetlana, Krichbaum, T.P., Blackburn, L., Jimenez Rosales, A., Moscibrodzka, Monika, Young, A., Davelaar, Jordy, Brinkerink, Christiaan D., Bronzwaer, T.J.W., Falcke, H.D.E., Fraga Encinas, R., Olivares, H., Goddi, C., La Bella, N., Müller, C., Musoke, Gibwa, Roelofs, Freek, Tilanus, Remo P.J., Rossum, D.R. van, Vos, Jesse, Wondrak, Michael, Zhang, Shuo, and Zhao, S.
Abstract: Contains fulltext : 253355.pdf (Publisher’s version ) (Open Access)
Published: 2022

34. In COVID-19 health messaging, loss framing increases anxiety with Little-to-No concomitant benefits: Experimental evidence from 84 countries

Author: Dorison, C.A., Lerner, J.S., Heller, B.H., Rothman, A.J., Kawachi, I.I., Wang, K., Rees, V.W., Gill, B.P., Gibbs, N., Ebersole, C.R., Vally, Z., Tajchman, Z., Zsido, A.N., Zrimsek, M., Chen, Z., Ziano, I., Gialitaki, Z., Ceary, C.D., Lin, Y., Kunisato, Y., Yamada, Y., Xiao, Q., Jiang, X., Du, X., Yao, E., Wilson, J.P., Cyrus-Lai, W., Jimenez-Leal, W., Law, W., Collins, W.M., Richard, K.L., Vranka, M., Ankushev, V., Schei, V., Križanić, V., Kadreva, V.H., Adoric, V.C., Tran, U.S., Yeung, S.K., Hassan, W., Houston, R., Lima, T.J.S., Ostermann, T., Frizzo, T., Sverdrup, T.E., House, T., Gill, T., Fedotov, M., Paltrow, T., Jernsäther, T., Koptjevskaja-Tamm, M., Hostler, T.J., Ishii, T., Szaszi, B., Adamus, S., Suter, L., Habib, S., Studzinska, A., Stojanovska, D., Janssen, S.M.J., Stieger, S., Schulenberg, S.E., Tatachari, S., Azouaghe, S., Sorokowski, P., Sorokowska, A., Song, X., Lewis, S.C., Sinkolova, S., Grigoryev, D., Drexler, S.M., Daches, S., Geniole, S.N., Vračar, S., Massoni, S., Zorjan, S., Sarıoğuz, E., Izquierdo, S.M., Alves, S.G., Pöntinen, S., Solas, S.Á., Ordoñez-Riaño, S., Očovaj, S.B., Onie, S., Lins, S., Çoksan, S., Sacakli, A., Ruiz-Fernández, S., Geiger, S.J., FatahModares, S., Walczak, R.B., Betlehem, R., Vilar, R., Cárcamo, R., Ross, R.M., McCarthy, R., Ballantyne, T., Westgate, E.C., Afhami, R., Ren, D., Monteiro, R.P., Reips, U-D, Reggev, N., Calin-Jageman, R.J., Pourafshari, R., Oliveira, R., Nedelcheva-Datsova, M., Rahal, R-M, Ribeiro, R.R., Radtke, T., Searston, R., Habte, R., Zdybek, P., Chen, S-C, Maturan, P.L.G., Perillo, J.T., Isager, P.M., Kačmár, P., Macapagal, P.M., Szwed, P., Hanel, P.H.P., Forbes, P.A.G., Arriaga, P., Paris, B., Papachristopoulos, K., Correa, P.S., Kácha, O., Bernardo, M., Campos, O., Bravo, O.N., Galindo-Caballero, O.J., Ogbonnaya, C.E., Bialobrzeska, O., Kiselnikova, N., Simonovic, N., Cohen, N., Nock, N.L., Johannes, N., Albayrak-Aydemir, N., Say, N., Torunsky, N., Van Doren, N., Sunami, N., Rachev, N.R., Majeed, N.M., Schmidt, N-D, Nadif, K., Corral-Frías, N.S., Ouherrou, N., Pantazi, M., Lucas, M.Y., Vasilev, M.R., Ortiz, M.V., Butt, M.M., Kabir, M., Muda, R., Tejada Rivera, M.del.C.MC., Sirota, M., Seehuus, M., Parzuchowski, M., Toro, M., Hricova, M., Maldonado, M.A., Marszalek, M., Karekla, M., Mioni, G., Bosma, M.J., Westerlund, M., Vdovic, M., Bialek, M., Silan, M.A., Anne, M., Misiak, M., Grinberg, M., Capizzi, M., Espinoza Barría, M.F., Kurfali, M.A., Mensink, M.C., Harutyunyan, M., Khosla, M., Korbmacher, M., Adamkovič, M., Ribeiro, M.F.F., Terskova, M., Hruška, M., Martončik, M., Voracek, M., Čadek, M., Frias-Armenta, M., Kowal, M., Topor, M., Roczniewska, M., Oosterlinck, M., Kohlová, M.B., Paruzel-Czachura, M., Romanova, M., Papadatou-Pastou, M., Lund, M.L., Antoniadi, M., Jones, M.V., Ortiz, M.S., Manavalan, M., Muminov, A., Kossowska, M., Friedemann, M., Wielgus, M., Varella, M.A.C., Colloff, M.F., Bradford, M., Vaughn, L.A., Eudave, L., Vieira, L., Pineda, L.M.S., Pérez, L.C., Lazarevic, L.B., Jaremka, L.M., Kushnir, E., Anton-Boicuk, L., de Holanda Coelho, G.L., Ahlgren, L., Levitan, C.A., Micheli, L., Volz, L., Stojanovska, M., Boucher, L., Samojlenko, L., Delgado, L.G.J., Kaliska, L., Warmelink, L., Rojas-Berscia, L.M., Yu, K., Wachowicz, J., Desai, K., Barzykowski, K., Kozma, L., Evans, K., Kirgizova, K., Agesin, B.E., Koehn, M.A., Wolfe, K., Korobova, T., Klevjer, K., van Schie, K., Vezirian, K., Damnjanović, K., Thommesen, K.K., Schmidt, K., Filip, K., Grzech, K., Hoyer, K., Moon, K., Rana, K., Janjić, K., Suchow, J.W., Kielińska, J., Cruz Vásquez, J.E., Beitner, J., Vargas-Nieto, J.C., Roxas, J.C.T., Taber, J., Urriago-Rayo, J., Pavlacic, J.M., Bavolar, J., Soto, J.A., Olofsson, J.K., Vilsmeier, J.K., Messerschmidt, J., Czamanski-Cohen, J., Boudesseul, J., Lee, J.M., Kamburidis, J., Zickfeld, J., Miranda, J.F., Verharen, J.P.H., Hristova, E., Beshears, J.E., Đorđević, J.M., Bosch, J., Valentova, J.V., Antfolk, J., Berkessel, J.B., Schrötter, J., Urban, J., Röer, J.P., Norton, J.O., Silva, J.R., Pickering, J.S., Vintr, J., Uttley, J., Kunst, J.R., Ndukaihe, I.L.G., Iyer, A., Vilares, I., Ivanov, A., Ropovik, I., Sula, I., Sarieva, I., Metin-Orta, I., Prusova, I., Pinto, I., Bozdoc, A.I., Almeida, I.A.T., Pit, I.L., Dalgar, I., Zakharov, I., Arinze, A.I., Ihaya, K., Stephen, I.D., Gjoneska, B., Brohmer, H., Flowe, H., Godbersen, H., Kocalar, H.E., Hedgebeth, M.V., Chuan-Peng, H., Sharifian, M., Manley, H., Akkas, H., Hajdu, N., Azab, H., Kaminski, Gw., Nilsonne, G., Anjum, G., Travaglino, G.A., Feldman, G., Pfuhl, G., Czarnek, G., Marcu, G.M., Hofer, G., Banik, G., Adetula, G.A., Bijlstra, G., Verbruggen, F., Kung, F.Y.H., Foroni, F., Singer, G., Muchembled, F., Azevedo, F., Mosannenzadeh, F., Marinov, E., Štrukelj, E., Etebari, Z., Baskin, E., Garcia, E.O.L., Musser, E., van Steenkiste, I.M.M., Ahn, E.R., Pronizius, E., Jackson, E.A., Manunta, E., Agadullina, E., Šakan, D., Dursun, P., Dujols, O., Dubrov, D., Willis, M., Tümer, M., Beaudry, J.L., Popović, D., Dunleavy, D., Djamai, I., Krupić, D., Vega, D., Du, H., Mola, D., Davis, W.E., Holford, D.L., Lewis, D.M.G., Vaidis, D.C., Ozery, D.H., Ricaurte, D.Z., Storage, D., Sousa, D., Alvarez, D.S., Rosa, A.D., Marko, D., Moreau, D., Reeck, C., Correia, R.C., Whitt, C.M., Lamm, C., Solorzano, C.S., von Bastian, C.C., Sutherland, C.A.M., Overkott, C., Aberson, C.L., Wang, C., Karashiali, C., Noone, C., Chiu, F., Picciocchi, C., Karaarslan, C., Cellini, N., Esteban-Serna, C., Reyna, C., Batres, C., Li, R., Grano, C., Carpentier, J., Tamnes, C.K., Fu, C.H.Y., Ishkhanyan, B., Bylinina, L., Jaeger, B., Bundt, C., Allred, T.B., Bokkour, A., Bogatyreva, N., Chopik, W.J., Antazo, B., Behzadnia, B., Becker, M., Cocco, B., Chou, W-L, Hubena, B., Žuro, B., Aczel, B., Baklanova, E., Bai, H., Balci, B.B., Babinčák, P., Dixson, B.J.W., Mokady, A., Kappes, H.B., Atari, M., Szala, A., Szabelska, A., Aruta, J.J.B., Domurat, A., Arinze, N.C., Modena, A., Adiguzel, A., Monajem, A., ARABI, K.A.E., Özdoğru, A.A., Olaya Torres, A.J., Theodoropoulou, A., Jurković, A.P., Kassianos, A.P., Findor, A., Hartanto, A., Thibault Landry, A., Ferreira, A., Santos, A.C., De la Rosa-Gomez, A., Gourdon-Kanhukamwe, A., Todsen, A.L., Karababa, A., Janak, A., Bran, A., Tullett, A.M., Kuzminska, A.O., Krafnick, A.J., Urooj, A., Khaoudi, A., Ahmed, A., Groyecka-Bernard, A., Askelund, A.D., Adetula, A., Belaus, A., Charyate, A.C., Wichman, A.L., Stoyanova, A., Greenburgh, A., Thomas, A.G., Arvanitis, A., Forscher, P.S., Mallik, P.R., Primbs, M.A., Miller, J.K., Moshontz, H., Urry, H.L., IJzerman, H., Basnight-Brown, D.M., Chartier, C.R., Buchanan, E.M., Coles, N.A., Dorison, C.A., Lerner, J.S., Heller, B.H., Rothman, A.J., Kawachi, I.I., Wang, K., Rees, V.W., Gill, B.P., Gibbs, N., Ebersole, C.R., Vally, Z., Tajchman, Z., Zsido, A.N., Zrimsek, M., Chen, Z., Ziano, I., Gialitaki, Z., Ceary, C.D., Lin, Y., Kunisato, Y., Yamada, Y., Xiao, Q., Jiang, X., Du, X., Yao, E., Wilson, J.P., Cyrus-Lai, W., Jimenez-Leal, W., Law, W., Collins, W.M., Richard, K.L., Vranka, M., Ankushev, V., Schei, V., Križanić, V., Kadreva, V.H., Adoric, V.C., Tran, U.S., Yeung, S.K., Hassan, W., Houston, R., Lima, T.J.S., Ostermann, T., Frizzo, T., Sverdrup, T.E., House, T., Gill, T., Fedotov, M., Paltrow, T., Jernsäther, T., Koptjevskaja-Tamm, M., Hostler, T.J., Ishii, T., Szaszi, B., Adamus, S., Suter, L., Habib, S., Studzinska, A., Stojanovska, D., Janssen, S.M.J., Stieger, S., Schulenberg, S.E., Tatachari, S., Azouaghe, S., Sorokowski, P., Sorokowska, A., Song, X., Lewis, S.C., Sinkolova, S., Grigoryev, D., Drexler, S.M., Daches, S., Geniole, S.N., Vračar, S., Massoni, S., Zorjan, S., Sarıoğuz, E., Izquierdo, S.M., Alves, S.G., Pöntinen, S., Solas, S.Á., Ordoñez-Riaño, S., Očovaj, S.B., Onie, S., Lins, S., Çoksan, S., Sacakli, A., Ruiz-Fernández, S., Geiger, S.J., FatahModares, S., Walczak, R.B., Betlehem, R., Vilar, R., Cárcamo, R., Ross, R.M., McCarthy, R., Ballantyne, T., Westgate, E.C., Afhami, R., Ren, D., Monteiro, R.P., Reips, U-D, Reggev, N., Calin-Jageman, R.J., Pourafshari, R., Oliveira, R., Nedelcheva-Datsova, M., Rahal, R-M, Ribeiro, R.R., Radtke, T., Searston, R., Habte, R., Zdybek, P., Chen, S-C, Maturan, P.L.G., Perillo, J.T., Isager, P.M., Kačmár, P., Macapagal, P.M., Szwed, P., Hanel, P.H.P., Forbes, P.A.G., Arriaga, P., Paris, B., Papachristopoulos, K., Correa, P.S., Kácha, O., Bernardo, M., Campos, O., Bravo, O.N., Galindo-Caballero, O.J., Ogbonnaya, C.E., Bialobrzeska, O., Kiselnikova, N., Simonovic, N., Cohen, N., Nock, N.L., Johannes, N., Albayrak-Aydemir, N., Say, N., Torunsky, N., Van Doren, N., Sunami, N., Rachev, N.R., Majeed, N.M., Schmidt, N-D, Nadif, K., Corral-Frías, N.S., Ouherrou, N., Pantazi, M., Lucas, M.Y., Vasilev, M.R., Ortiz, M.V., Butt, M.M., Kabir, M., Muda, R., Tejada Rivera, M.del.C.MC., Sirota, M., Seehuus, M., Parzuchowski, M., Toro, M., Hricova, M., Maldonado, M.A., Marszalek, M., Karekla, M., Mioni, G., Bosma, M.J., Westerlund, M., Vdovic, M., Bialek, M., Silan, M.A., Anne, M., Misiak, M., Grinberg, M., Capizzi, M., Espinoza Barría, M.F., Kurfali, M.A., Mensink, M.C., Harutyunyan, M., Khosla, M., Korbmacher, M., Adamkovič, M., Ribeiro, M.F.F., Terskova, M., Hruška, M., Martončik, M., Voracek, M., Čadek, M., Frias-Armenta, M., Kowal, M., Topor, M., Roczniewska, M., Oosterlinck, M., Kohlová, M.B., Paruzel-Czachura, M., Romanova, M., Papadatou-Pastou, M., Lund, M.L., Antoniadi, M., Jones, M.V., Ortiz, M.S., Manavalan, M., Muminov, A., Kossowska, M., Friedemann, M., Wielgus, M., Varella, M.A.C., Colloff, M.F., Bradford, M., Vaughn, L.A., Eudave, L., Vieira, L., Pineda, L.M.S., Pérez, L.C., Lazarevic, L.B., Jaremka, L.M., Kushnir, E., Anton-Boicuk, L., de Holanda Coelho, G.L., Ahlgren, L., Levitan, C.A., Micheli, L., Volz, L., Stojanovska, M., Boucher, L., Samojlenko, L., Delgado, L.G.J., Kaliska, L., Warmelink, L., Rojas-Berscia, L.M., Yu, K., Wachowicz, J., Desai, K., Barzykowski, K., Kozma, L., Evans, K., Kirgizova, K., Agesin, B.E., Koehn, M.A., Wolfe, K., Korobova, T., Klevjer, K., van Schie, K., Vezirian, K., Damnjanović, K., Thommesen, K.K., Schmidt, K., Filip, K., Grzech, K., Hoyer, K., Moon, K., Rana, K., Janjić, K., Suchow, J.W., Kielińska, J., Cruz Vásquez, J.E., Beitner, J., Vargas-Nieto, J.C., Roxas, J.C.T., Taber, J., Urriago-Rayo, J., Pavlacic, J.M., Bavolar, J., Soto, J.A., Olofsson, J.K., Vilsmeier, J.K., Messerschmidt, J., Czamanski-Cohen, J., Boudesseul, J., Lee, J.M., Kamburidis, J., Zickfeld, J., Miranda, J.F., Verharen, J.P.H., Hristova, E., Beshears, J.E., Đorđević, J.M., Bosch, J., Valentova, J.V., Antfolk, J., Berkessel, J.B., Schrötter, J., Urban, J., Röer, J.P., Norton, J.O., Silva, J.R., Pickering, J.S., Vintr, J., Uttley, J., Kunst, J.R., Ndukaihe, I.L.G., Iyer, A., Vilares, I., Ivanov, A., Ropovik, I., Sula, I., Sarieva, I., Metin-Orta, I., Prusova, I., Pinto, I., Bozdoc, A.I., Almeida, I.A.T., Pit, I.L., Dalgar, I., Zakharov, I., Arinze, A.I., Ihaya, K., Stephen, I.D., Gjoneska, B., Brohmer, H., Flowe, H., Godbersen, H., Kocalar, H.E., Hedgebeth, M.V., Chuan-Peng, H., Sharifian, M., Manley, H., Akkas, H., Hajdu, N., Azab, H., Kaminski, Gw., Nilsonne, G., Anjum, G., Travaglino, G.A., Feldman, G., Pfuhl, G., Czarnek, G., Marcu, G.M., Hofer, G., Banik, G., Adetula, G.A., Bijlstra, G., Verbruggen, F., Kung, F.Y.H., Foroni, F., Singer, G., Muchembled, F., Azevedo, F., Mosannenzadeh, F., Marinov, E., Štrukelj, E., Etebari, Z., Baskin, E., Garcia, E.O.L., Musser, E., van Steenkiste, I.M.M., Ahn, E.R., Pronizius, E., Jackson, E.A., Manunta, E., Agadullina, E., Šakan, D., Dursun, P., Dujols, O., Dubrov, D., Willis, M., Tümer, M., Beaudry, J.L., Popović, D., Dunleavy, D., Djamai, I., Krupić, D., Vega, D., Du, H., Mola, D., Davis, W.E., Holford, D.L., Lewis, D.M.G., Vaidis, D.C., Ozery, D.H., Ricaurte, D.Z., Storage, D., Sousa, D., Alvarez, D.S., Rosa, A.D., Marko, D., Moreau, D., Reeck, C., Correia, R.C., Whitt, C.M., Lamm, C., Solorzano, C.S., von Bastian, C.C., Sutherland, C.A.M., Overkott, C., Aberson, C.L., Wang, C., Karashiali, C., Noone, C., Chiu, F., Picciocchi, C., Karaarslan, C., Cellini, N., Esteban-Serna, C., Reyna, C., Batres, C., Li, R., Grano, C., Carpentier, J., Tamnes, C.K., Fu, C.H.Y., Ishkhanyan, B., Bylinina, L., Jaeger, B., Bundt, C., Allred, T.B., Bokkour, A., Bogatyreva, N., Chopik, W.J., Antazo, B., Behzadnia, B., Becker, M., Cocco, B., Chou, W-L, Hubena, B., Žuro, B., Aczel, B., Baklanova, E., Bai, H., Balci, B.B., Babinčák, P., Dixson, B.J.W., Mokady, A., Kappes, H.B., Atari, M., Szala, A., Szabelska, A., Aruta, J.J.B., Domurat, A., Arinze, N.C., Modena, A., Adiguzel, A., Monajem, A., ARABI, K.A.E., Özdoğru, A.A., Olaya Torres, A.J., Theodoropoulou, A., Jurković, A.P., Kassianos, A.P., Findor, A., Hartanto, A., Thibault Landry, A., Ferreira, A., Santos, A.C., De la Rosa-Gomez, A., Gourdon-Kanhukamwe, A., Todsen, A.L., Karababa, A., Janak, A., Bran, A., Tullett, A.M., Kuzminska, A.O., Krafnick, A.J., Urooj, A., Khaoudi, A., Ahmed, A., Groyecka-Bernard, A., Askelund, A.D., Adetula, A., Belaus, A., Charyate, A.C., Wichman, A.L., Stoyanova, A., Greenburgh, A., Thomas, A.G., Arvanitis, A., Forscher, P.S., Mallik, P.R., Primbs, M.A., Miller, J.K., Moshontz, H., Urry, H.L., IJzerman, H., Basnight-Brown, D.M., Chartier, C.R., Buchanan, E.M., and Coles, N.A.
Abstract: The COVID-19 pandemic (and its aftermath) highlights a critical need to communicate health information effectively to the global public. Given that subtle differences in information framing can have meaningful effects on behavior, behavioral science research highlights a pressing question: Is it more effective to frame COVID-19 health messages in terms of potential losses (e.g., “If you do not practice these steps, you can endanger yourself and others”) or potential gains (e.g., “If you practice these steps, you can protect yourself and others”)? Collecting data in 48 languages from 15,929 participants in 84 countries, we experimentally tested the effects of message framing on COVID-19-related judgments, intentions, and feelings. Loss- (vs. gain-) framed messages increased self-reported anxiety among participants cross-nationally with little-to-no impact on policy attitudes, behavioral intentions, or information seeking relevant to pandemic risks. These results were consistent across 84 countries, three variations of the message framing wording, and 560 data processing and analytic choices. Thus, results provide an empirical answer to a global communication question and highlight the emotional toll of loss-framed messages. Critically, this work demonstrates the importance of considering unintended affective consequences when evaluating nudge-style interventions.
Published: 2022

35. Author Correction: A multi-country test of brief reappraisal interventions on emotions during the COVID-19 pandemic

Author: Wang, K., Goldenberg, A., Dorison, C.A., Miller, J.K., Uusberg, A., Lerner, J.S., Gross, J.J., Agesin, B.B., Bernardo, M., Campos, O., Eudave, L., Grzech, K., Ozery, D.H., Jackson, E.A., Garcia, E.O.L., Drexler, S.M., Jurković, A.P., Rana, K., Wilson, J.P., Antoniadi, M., Desai, K., Gialitaki, Z., Kushnir, E., Nadif, K., Bravo, O.N., Nauman, R., Oosterlinck, M., Pantazi, M., Pilecka, N., Szabelska, A., van Steenkiste, I.M.M., Filip, K., Bozdoc, A.I., Marcu, G.M., Agadullina, E., Adamkovič, M., Roczniewska, M., Reyna, C., Kassianos, A.P., Westerlund, M., Ahlgren, L., Pöntinen, S., Adetula, G.A., Dursun, P., Arinze, A.I., Arinze, N.C., Ogbonnaya, C.E., Ndukaihe, I.L.G., Dalgar, I., Akkas, H., Macapagal, P.M., Lewis, S., Metin-Orta, I., Foroni, F., Willis, M., Santos, A.C., Mokady, A., Reggev, N., Kurfali, M.A., Vasilev, M.R., Nock, N.L., Parzuchowski, M., Espinoza Barría, M.F., Vranka, M., Kohlová, M.B., Ropovik, I., Harutyunyan, M., Wang, C., Yao, E., Becker, M., Manunta, E., Kaminski, G., Boudesseul, J., Marko, D., Evans, K., Lewis, D.M.G., Findor, A., Landry, A.T., Aruta, J.J.B., Ortiz, M.S., Vally, Z., Pronizius, E., Voracek, M., Lamm, C., Grinberg, M., Li, R., Valentova, J.V., Mioni, G., Cellini, N., Chen, S-C, Zickfeld, J., Moon, K., Azab, H., Levy, N., Karababa, A., Beaudry, J.L., Boucher, L., Collins, W.M., Todsen, A.L., van Schie, K., Vintr, J., Bavolar, J., Kaliska, L., Križanić, V., Samojlenko, L., Pourafshari, R., Geiger, S.J., Beitner, J., Warmelink, L., Ross, R.M., Stephen, I.D., Hostler, T.J., Azouaghe, S., McCarthy, R., Szala, A., Grano, C., Solorzano, C.S., Anjum, G., Jimenez-Leal, W., Bradford, M., Pérez, L.C., Cruz Vásquez, J.E., Galindo-Caballero, O.J., Vargas-Nieto, J.C., Kácha, O., Arvanitis, A., Xiao, Q., Cárcamo, R., Zorjan, S., Tajchman, Z., Vilares, I., Pavlacic, J.M., Kunst, J.R., Tamnes, C.K., von Bastian, C.C., Atari, M., Sharifian, M.H., Hricova, M., Kačmár, P., Schrötter, J., Rahal, R-M, Cohen, N., FatahModares, S., Zrimsek, M., Zakharov, I., Koehn, M.A., Esteban-Serna, C., Calin-Jageman, R.J., Krafnick, A. J., Štrukelj, E., Isager, P.M., Urban, J., Silva, J.R., Martončik, M., Očovaj, S.B., Šakan, D., Kuzminska, A.O., Djordjevic, J.M., Almeida, I.A.T., Ferreira, A., Lazarevic, L.B., Manley, H., Ricaurte, D.Z., Monteiro, R.P., Etabari, Z., Musser, E., Dunleavy, D., Chou, W., Godbersen, H., Ruiz-Fernández, S., Reeck, C., Batres, C., Kirgizova, K., Muminov, A., Azevedo, F., Alvarez, D.S., Butt, M.M., Lee, J.M., Chen, Z., Verbruggen, F., Ziano, I., Tümer, M., Charyate, A.C.A., Dubrov, D., Tejada Rivera, M.d.C.M.C., Aberson, C., Pálfi, B., Maldonado, M.A., Hubena, B., Sacakli, A., Ceary, C.D., Richard, K.L., Singer, G., Perillo, J.T., Ballantyne, T., Cyrus-Lai, W., Fedotov, M., Du, H., Wielgus, M., Pit, I.L., Hruška, M., Sousa, D., Aczel, B., Hajdu, N., Szaszi, B., Adamus, S., Barzykowski, K., Micheli, L., Schmidt, N-D, Zsido, A.N., Paruzel-Czachura, M., Muda, R., Bialek, M., Kowal, M., Sorokowska, A., Misiak, M., Mola, D., Ortiz, M.V., Correa, P.S., Belaus, A., Muchembled, F., Ribeiro, R.R., Arriaga, P., Oliveira, R., Vaughn, L.A., Szwed, P., Kossowska, M., Czarnek, G., Kielińska, J., Antazo, B., Betlehem, R., Stieger, S., Nilsonne, G., Simonovic, N., Taber, J., Gourdon-Kanhukamwe, A., Domurat, A., Ihaya, K., Yamada, Y., Urooj, A., Gill, T., Čadek, M., Bylinina, L., Messerschmidt, J., Kurfalı, M., Adetula, A., Baklanova, E., Albayrak-Aydemir, N., Kappes, H.B., Gjoneska, B., House, T., Jones, M.V., Berkessel, J.B., Chopik, W.J., Çoksan, S., Seehuus, M., Khaoudi, A., Bokkour, A., El Arabi, K.A., Djamai, I., Iyer, A., Parashar, N., Adiguzel, A., Kocalar, H.E., Bundt, C., Norton, J.O., Papadatou-Pastou, M., De la Rosa-Gomez, A., Ankushev, V., Bogatyreva, N., Grigoryev, D., Ivanov, A., Prusova, I., Romanova, M., Sarieva, I., Terskova, M., Hristova, E., Kadreva, V.H., Janak, A., Schei, V., Sverdrup, T.E., Askelund, A.D., Pineda, L.M.S., Krupić, D., Levitan, C.A., Johannes, N., Ouherrou, N., Say, N., Sinkolova, S., Janjić, K., Stojanovska, M., Stojanovska, D., Khosla, M., Thomas, A.G., Kung, F.Y.H., Bijlstra, G., Mosannenzadeh, F., Balci, B.B., Reips, U-D, Baskin, E., Ishkhanyan, B., Czamanski-Cohen, J., Dixson, B.J.W., Moreau, D., Sutherland, C.A.M., Chuan-Peng, H., Noone, C., Flowe, H., Anne, M., Janssen, S.M.J., Topor, M., Majeed, N.M., Kunisato, Y., Yu, K., Daches, S., Hartanto, A., Vdovic, M., Anton-Boicuk, L., Forbes, P.A.G., Kamburidis, J., Marinova, E., Nedelcheva-Datsova, M., Rachev, N.R., Stoyanova, A., Schmidt, K., Suchow, J.W., Koptjevskaja-Tamm, M., Jernsäther, T., Olofsson, J.K., Bialobrzeska, O., Marszalek, M., Tatachari, S., Afhami, R., Law, W., Antfolk, J., Žuro, B., Van Doren, N., Soto, J.A., Searston, R., Miranda, J., Damnjanović, K., Yeung, S.K., Hoyer, K., Jaeger, B., Ren, D., Pfuhl, G., Klevjer, K., Corral-Frías, N.S., Frias-Armenta, M., Lucas, M.Y., Torres, A.O., Toro, M., Delgado, L.G.J., Vega, D., Solas, S.Á., Vilar, R., Massoni, S., Frizzo, T., Bran, A., Vaidis, D.C., Vieira, L., Paris, B., Capizzi, M., Coelho, G.L.d.H., Greenburgh, A., Whitt, C.M., Tullett, A.M., Du, X., Volz, L., Bosma, M.J., Karaarslan, C., Sarıoğuz, E., Allred, T.B., Korbmacher, M., Colloff, M.F., Lima, T.J.S., Ribeiro, M.F.F., Verharen, J.P.H., Karekla, M., Karashiali, C., Sunami, N., Jaremka, L.M., Storage, D., Habib, S., Studzinska, A., Hanel, P.H.P., Holford, D.L., Sirota, M., Wolfe, K., Chiu, F., Theodoropoulou, A., Ahn, E.R., Lin, Y., Westgate, E.C., Brohmer, H., Hofer, G., Dujols, O., Vezirian, K., Feldman, G., Travaglino, G.A., Ahmed, A., Li, M., Bosch, J., Torunsky, N., Bai, H., Manavalan, M., Song, X., Walczak, R.B., Zdybek, P., Friedemann, M., Rosa, A.D., Kozma, L., Alves, S.G., Lins, S., Pinto, I.R., Correia, R.C., Babinčák, P., Banik, G., Rojas-Berscia, L.M., Varella, M.A.C., Uttley, J., Beshears, J.E., Thommesen, K.K., Behzadnia, B., Geniole, S.N., Silan, M.A., Maturan, P.L.G., Vilsmeier, J.K., Tran, U.S., Izquierdo, S.M., Mensink, M.C., Sorokowski, P., Groyecka-Bernard, A., Radtke, T., Adoric, V.C., Carpentier, J., Özdoğru, A.A., Joy-Gaba, J.A., Hedgebeth, M.V., Ishii, T., Wichman, A.L., Röer, J.P., Ostermann, T., Davis, W.E., Suter, L., Papachristopoulos, K., Zabel, C., Onie, S., Ebersole, C.R., Chartier, C.R., Mallik, P.R., Urry, H.L., Buchanan, E.M., Coles, N.A., Primbs, M.A., Basnight-Brown, D.M., IJzerman, H., Forscher, P.S., Moshontz, H., Wang, K., Goldenberg, A., Dorison, C.A., Miller, J.K., Uusberg, A., Lerner, J.S., Gross, J.J., Agesin, B.B., Bernardo, M., Campos, O., Eudave, L., Grzech, K., Ozery, D.H., Jackson, E.A., Garcia, E.O.L., Drexler, S.M., Jurković, A.P., Rana, K., Wilson, J.P., Antoniadi, M., Desai, K., Gialitaki, Z., Kushnir, E., Nadif, K., Bravo, O.N., Nauman, R., Oosterlinck, M., Pantazi, M., Pilecka, N., Szabelska, A., van Steenkiste, I.M.M., Filip, K., Bozdoc, A.I., Marcu, G.M., Agadullina, E., Adamkovič, M., Roczniewska, M., Reyna, C., Kassianos, A.P., Westerlund, M., Ahlgren, L., Pöntinen, S., Adetula, G.A., Dursun, P., Arinze, A.I., Arinze, N.C., Ogbonnaya, C.E., Ndukaihe, I.L.G., Dalgar, I., Akkas, H., Macapagal, P.M., Lewis, S., Metin-Orta, I., Foroni, F., Willis, M., Santos, A.C., Mokady, A., Reggev, N., Kurfali, M.A., Vasilev, M.R., Nock, N.L., Parzuchowski, M., Espinoza Barría, M.F., Vranka, M., Kohlová, M.B., Ropovik, I., Harutyunyan, M., Wang, C., Yao, E., Becker, M., Manunta, E., Kaminski, G., Boudesseul, J., Marko, D., Evans, K., Lewis, D.M.G., Findor, A., Landry, A.T., Aruta, J.J.B., Ortiz, M.S., Vally, Z., Pronizius, E., Voracek, M., Lamm, C., Grinberg, M., Li, R., Valentova, J.V., Mioni, G., Cellini, N., Chen, S-C, Zickfeld, J., Moon, K., Azab, H., Levy, N., Karababa, A., Beaudry, J.L., Boucher, L., Collins, W.M., Todsen, A.L., van Schie, K., Vintr, J., Bavolar, J., Kaliska, L., Križanić, V., Samojlenko, L., Pourafshari, R., Geiger, S.J., Beitner, J., Warmelink, L., Ross, R.M., Stephen, I.D., Hostler, T.J., Azouaghe, S., McCarthy, R., Szala, A., Grano, C., Solorzano, C.S., Anjum, G., Jimenez-Leal, W., Bradford, M., Pérez, L.C., Cruz Vásquez, J.E., Galindo-Caballero, O.J., Vargas-Nieto, J.C., Kácha, O., Arvanitis, A., Xiao, Q., Cárcamo, R., Zorjan, S., Tajchman, Z., Vilares, I., Pavlacic, J.M., Kunst, J.R., Tamnes, C.K., von Bastian, C.C., Atari, M., Sharifian, M.H., Hricova, M., Kačmár, P., Schrötter, J., Rahal, R-M, Cohen, N., FatahModares, S., Zrimsek, M., Zakharov, I., Koehn, M.A., Esteban-Serna, C., Calin-Jageman, R.J., Krafnick, A. J., Štrukelj, E., Isager, P.M., Urban, J., Silva, J.R., Martončik, M., Očovaj, S.B., Šakan, D., Kuzminska, A.O., Djordjevic, J.M., Almeida, I.A.T., Ferreira, A., Lazarevic, L.B., Manley, H., Ricaurte, D.Z., Monteiro, R.P., Etabari, Z., Musser, E., Dunleavy, D., Chou, W., Godbersen, H., Ruiz-Fernández, S., Reeck, C., Batres, C., Kirgizova, K., Muminov, A., Azevedo, F., Alvarez, D.S., Butt, M.M., Lee, J.M., Chen, Z., Verbruggen, F., Ziano, I., Tümer, M., Charyate, A.C.A., Dubrov, D., Tejada Rivera, M.d.C.M.C., Aberson, C., Pálfi, B., Maldonado, M.A., Hubena, B., Sacakli, A., Ceary, C.D., Richard, K.L., Singer, G., Perillo, J.T., Ballantyne, T., Cyrus-Lai, W., Fedotov, M., Du, H., Wielgus, M., Pit, I.L., Hruška, M., Sousa, D., Aczel, B., Hajdu, N., Szaszi, B., Adamus, S., Barzykowski, K., Micheli, L., Schmidt, N-D, Zsido, A.N., Paruzel-Czachura, M., Muda, R., Bialek, M., Kowal, M., Sorokowska, A., Misiak, M., Mola, D., Ortiz, M.V., Correa, P.S., Belaus, A., Muchembled, F., Ribeiro, R.R., Arriaga, P., Oliveira, R., Vaughn, L.A., Szwed, P., Kossowska, M., Czarnek, G., Kielińska, J., Antazo, B., Betlehem, R., Stieger, S., Nilsonne, G., Simonovic, N., Taber, J., Gourdon-Kanhukamwe, A., Domurat, A., Ihaya, K., Yamada, Y., Urooj, A., Gill, T., Čadek, M., Bylinina, L., Messerschmidt, J., Kurfalı, M., Adetula, A., Baklanova, E., Albayrak-Aydemir, N., Kappes, H.B., Gjoneska, B., House, T., Jones, M.V., Berkessel, J.B., Chopik, W.J., Çoksan, S., Seehuus, M., Khaoudi, A., Bokkour, A., El Arabi, K.A., Djamai, I., Iyer, A., Parashar, N., Adiguzel, A., Kocalar, H.E., Bundt, C., Norton, J.O., Papadatou-Pastou, M., De la Rosa-Gomez, A., Ankushev, V., Bogatyreva, N., Grigoryev, D., Ivanov, A., Prusova, I., Romanova, M., Sarieva, I., Terskova, M., Hristova, E., Kadreva, V.H., Janak, A., Schei, V., Sverdrup, T.E., Askelund, A.D., Pineda, L.M.S., Krupić, D., Levitan, C.A., Johannes, N., Ouherrou, N., Say, N., Sinkolova, S., Janjić, K., Stojanovska, M., Stojanovska, D., Khosla, M., Thomas, A.G., Kung, F.Y.H., Bijlstra, G., Mosannenzadeh, F., Balci, B.B., Reips, U-D, Baskin, E., Ishkhanyan, B., Czamanski-Cohen, J., Dixson, B.J.W., Moreau, D., Sutherland, C.A.M., Chuan-Peng, H., Noone, C., Flowe, H., Anne, M., Janssen, S.M.J., Topor, M., Majeed, N.M., Kunisato, Y., Yu, K., Daches, S., Hartanto, A., Vdovic, M., Anton-Boicuk, L., Forbes, P.A.G., Kamburidis, J., Marinova, E., Nedelcheva-Datsova, M., Rachev, N.R., Stoyanova, A., Schmidt, K., Suchow, J.W., Koptjevskaja-Tamm, M., Jernsäther, T., Olofsson, J.K., Bialobrzeska, O., Marszalek, M., Tatachari, S., Afhami, R., Law, W., Antfolk, J., Žuro, B., Van Doren, N., Soto, J.A., Searston, R., Miranda, J., Damnjanović, K., Yeung, S.K., Hoyer, K., Jaeger, B., Ren, D., Pfuhl, G., Klevjer, K., Corral-Frías, N.S., Frias-Armenta, M., Lucas, M.Y., Torres, A.O., Toro, M., Delgado, L.G.J., Vega, D., Solas, S.Á., Vilar, R., Massoni, S., Frizzo, T., Bran, A., Vaidis, D.C., Vieira, L., Paris, B., Capizzi, M., Coelho, G.L.d.H., Greenburgh, A., Whitt, C.M., Tullett, A.M., Du, X., Volz, L., Bosma, M.J., Karaarslan, C., Sarıoğuz, E., Allred, T.B., Korbmacher, M., Colloff, M.F., Lima, T.J.S., Ribeiro, M.F.F., Verharen, J.P.H., Karekla, M., Karashiali, C., Sunami, N., Jaremka, L.M., Storage, D., Habib, S., Studzinska, A., Hanel, P.H.P., Holford, D.L., Sirota, M., Wolfe, K., Chiu, F., Theodoropoulou, A., Ahn, E.R., Lin, Y., Westgate, E.C., Brohmer, H., Hofer, G., Dujols, O., Vezirian, K., Feldman, G., Travaglino, G.A., Ahmed, A., Li, M., Bosch, J., Torunsky, N., Bai, H., Manavalan, M., Song, X., Walczak, R.B., Zdybek, P., Friedemann, M., Rosa, A.D., Kozma, L., Alves, S.G., Lins, S., Pinto, I.R., Correia, R.C., Babinčák, P., Banik, G., Rojas-Berscia, L.M., Varella, M.A.C., Uttley, J., Beshears, J.E., Thommesen, K.K., Behzadnia, B., Geniole, S.N., Silan, M.A., Maturan, P.L.G., Vilsmeier, J.K., Tran, U.S., Izquierdo, S.M., Mensink, M.C., Sorokowski, P., Groyecka-Bernard, A., Radtke, T., Adoric, V.C., Carpentier, J., Özdoğru, A.A., Joy-Gaba, J.A., Hedgebeth, M.V., Ishii, T., Wichman, A.L., Röer, J.P., Ostermann, T., Davis, W.E., Suter, L., Papachristopoulos, K., Zabel, C., Onie, S., Ebersole, C.R., Chartier, C.R., Mallik, P.R., Urry, H.L., Buchanan, E.M., Coles, N.A., Primbs, M.A., Basnight-Brown, D.M., IJzerman, H., Forscher, P.S., and Moshontz, H.
Abstract: Correction to: Nature Human Behaviour https://doi.org/10.1038/s41562-021-01173-x, published online 2 August 2021. In the version of this article initially published, the following authors were omitted from the author list and the Author contributions section for “investigation” and “writing and editing”: Nandor Hajdu (Institute of Psychology, ELTE Eötvös Loránd University, Budapest, Hungary), Jordane Boudesseul (Facultad de Psicología, Instituto de Investigación Científica, Universidad de Lima, Lima, Perú), Rafał Muda (Faculty of Economics, Maria Curie-Sklodowska University, Lublin, Poland) and Sandersan Onie (Black Dog Institute, UNSW Sydney, Sydney, Australia & Emotional Health for All Foundation, Jakarta, Indonesia). In addition, Saeideh FatahModares’ name was originally misspelled as Saiedeh FatahModarres in the author list. Further, affiliations have been corrected for Maria Terskova (National Research University Higher School of Economics, Moscow, Russia), Susana Ruiz Fernandez (FOM University of Applied Sciences, Essen; Leibniz-Institut für Wissensmedien, Tübingen, and LEAD Research Network, Eberhard Karls University, Tübingen, Germany), Hendrik Godbersen (FOM University of Applied Sciences, Essen, Germany), Gulnaz Anjum (Department of Psychology, Simon Fraser University, Burnaby, Canada, and Department of Economics & Social Sciences, Institute of Business Administration, Karachi, Pakistan). The changes have been made to the HTML and PDF versions of the article.
Published: 2022

36. In COVID-19 Health Messaging, Loss Framing Increases Anxiety with Little-to-No Concomitant Benefits: Experimental Evidence from 84 Countries

Author: Dorison, C. A., Lerner, J. S., Heller, B. H., Rothman, A. J., Kawachi, I. I., Wang, K., Rees, V. W., Gill, B. P., Gibbs, N., Ebersole, C. R., Vally, Z., Tajchman, Z., Zsido, A. N., Zrimsek, M., Chen, Z., Ziano, I., Gialitaki, Z., Ceary, C. D., Jang, Y., Lin, Y., Kunisato, Y., Yamada, Y., Xiao, Q., Jiang, X., Du, X., Yao, E., Ryan, W., Wilson, J. P., Cyrus-Lai, W., Jimenez-Leal, W., Law, W., Unanue, W., Collins, W. M., Richard, K. L., Vranka, M., Ankushev, V., Schei, V., DePaola, C., Lerche, V., Kovic, V., Križanić, V., Kadreva, V. H., Adoric, V. C., Tran, U. S., Yeung, S. K., Hassan, W., Houston, R., Machin, M. A., Lima, T. J. S., Ostermann, T., Frizzo, T., Sverdrup, T. E., House, T., Gill, T., Fedotov, M., Paltrow, T., Jernsäther, T., Rahman, T., Machin, T., Koptjevskaja-Tamm, M., Hostler, T. J., Ishii, T., Szaszi, B., Adamus, S., Suter, L., von Bormann, S. M., Habib, S., Studzinska, A., Stojanovska, D., Janssen, S. M. J., Stieger, S., Schulenberg, S. E., Tatachari, S., Azouaghe, S., Sorokowski, P., Sorokowska, A., Song, X., Morbée, S., Lewis, S. C., Sinkolova, S., Grigoryev, D., Drexler, S. M., Daches, S., Levine, S. L., Geniole, S. N., Akter, S., Vračar, S., Massoni, S., Costa, S., Zorjan, S., Sarıoğuz, E., Morales Izquierdo, S., Tshonda, S. S., Alves, S. G., Pöntinen, S., Álvarez Solas, S., Ordoñez-Riaño, S., Batić Očovaj, S., Onie, S., Lins, S., Biberauer, T., Çoksan, S., Khumkom, S., Sacakli, A., Ruiz-Fernández, S., Geiger, S. J., FatahModares, S., Walczak, R. B., Betlehem, R., Vilar, R., Doekemeijer, R., Cárcamo, R., Ross, R. M., McCarthy, R., Ballantyne, T., Westgate, E. C., Gargurevich, R., Afhami, R., Ren, D., Monteiro, R. P., Reips, U-D., Reggev, N., Calin-Jageman, R. J., Pourafshari, R., London, R., Oliveira, R., Nedelcheva-Datsova, M., Rahal, R-M., Ribeiro, R. R., Radtke, T., Searston, R., Jai-ai, R., Habte, R., Zdybek, P., Chen, S-C., Wajanatinapart, P., Maturan, P. L. G., Perillo, J. T., Isager, P. M., Kačmár, P., Macapagal, P. M., Maniaci, M. R., Szwed, P., Hanel, P. H. P., Forbes, P. A. G., Arriaga, P., Paris, B., Parashar, N., Papachristopoulos, K., Sebastián-Correa, P., Kácha, O., Bernardo, M., Campos, O., Niño Bravo, O., Galindo-Caballero, O. J., Ogbonnaya, C. E., Bialobrzeska, O., Kiselnikova, N., Simonovic, N., Cohen, N., Nock, N. L., Hernandez, A., Thogersen-Ntoumani, C., Ntoumanis, N., Johannes, N., Albayrak-Aydemir, N., Say, N., Neubauer, A. B., Martin, N. I., Torunsky, N., van Antwerpen, N., Van Doren, N., Sunami, N., Rachev, N. R., Majeed, N. M., Schmidt, N-D., Nadif, K., Corral-Frías, N. S., Ouherrou, N., Abbas, N., Pantazi, M., Lucas, M. Y., Vasilev, Martin R., Ortiz, M. V., Butt, M. M., Kurfali, M., Kabir, M., Muda, R., Tejada Rivera, M. C., Sirota, M., Seehuus, M., Parzuchowski, M., Toro, M., Hricova, M., Alarcón Maldonado, M., Rentzelas, P., Vansteenkiste, M., Metz, M. A., Marszalek, M., Karekla, M., Mioni, G., Bosma, M. J., Westerlund, M., Vdovic, M., Bialek, M., Silan, M. A., Anne, M., Misiak, M., Gugliandolo, M. C., Grinberg, M., Capizzi, M., Espinoza Barría, M. F., Kurfali, M. A., Mensink, M. C., Harutyunyan, M., Khosla, M., Dunn, M. R., Korbmacher, M., Adamkovič, M., Ribeiro, M. F. F., Terskova, M., Hruška, M., Martončik, M., Jansen, M., Voracek, M., Čadek, M., Frias-Armenta, M., Kowal, M., Topor, M., Roczniewska, M., Oosterlinck, M., Braun Kohlová, M., Paruzel-Czachura, M., Sabristov, M., Romanova, M., Papadatou-Pastou, M., Lund, M. L., Antoniadi, M., Magrin, M. E., Jones, M. V., Ortiz, M. S., Manavalan, M., Muminov, A., Kossowska, M., Friedemann, M., Wielgus, M., van Hooff, M. L. M., Varella, M. A. C., Standage, M., Nicolotti, M., Colloff, M. F., Bradford, M., Vaughn, L. A., Eudave, L., Vieira, L., Sanabria Pineda, L. M., Matos, L., Calderón Pérez, L., Lazarevic, L. B., Jaremka, L. M., Smit, E. S., Kushnir, E., Ferguson, L. J., Anton-Boicuk, L., Lins de Holanda Coelho, G., Ahlgren, L., Liga, F., Levitan, C. A., Micheli, L., Gunton, L-A., Volz, L., Stojanovska, M., Boucher, L., Samojlenko, L., Javela Delgado, L. G., Kaliska, L., Labadi, B., Warmelink, L., Rojas-Berscia, L. M., Yu, K., Wylie, K., Wachowicz, J., Desai, K., Barzykowski, K., Kozma, L., Evans, K., Kirgizova, K., Agesin, B. E., Koehn, M. A., Wolfe, K., Korobova, T., Morris, K., Klevjer, K., van Schie, K., Vezirian, K., Damnjanović, K., Krabbe Thommesen, K., Schmidt, K., Filip, K., Staniaszek, K., Grzech, K., Hoyer, K., Moon, K., Khaobunmasiri, S., Rana, K., Janjić, K., Suchow, J. W., Kielińska, J., Cruz Vásquez, J. E., Chanal, J., Beitner, J., Vargas-Nieto, J. C., Roxas, J. C. T., Taber, J., Urriago-Rayo, J., Pavlacic, J. M., Benka, J., Bavolar, J., Soto, J. A., Olofsson, J. K., Vilsmeier, J. K., Messerschmidt, J., Czamanski-Cohen, J., Waterschoot, J., Moss, J. D., Boudesseul, J., Lee, J. M., Kamburidis, J., Joy-Gaba, J. A., Zickfeld, J., Miranda, J. F., Verharen, J. P. H., Hristova, E., Beshears, J. E., Đorđević, J. M., Bosch, J., Valentova, J. V., Antfolk, J., Berkessel, J. B., Schrötter, J., Urban, J., Röer, J. P., Norton, J. O., Silva, J. R., Pickering, J. S., Vintr, J., Uttley, J., Kunst, J. R., Ndukaihe, I. L. G., Iyer, A., Vilares, I., Ivanov, A., Ropovik, I., Sula, I., Sarieva, I., Metin-Orta, I., Prusova, I., Pinto, I., Bozdoc, A. I., Almeida, I. A. T., Pit, I. L., Dalgar, I., Zakharov, I., Arinze, A. I., Ihaya, K., Stephen, I. D., Gjoneska, B., Brohmer, H., Flowe, H., Godbersen, H., Kocalar, H. E., Hedgebeth, M. V., Chuan-Peng, H., Sharifian, M. H., Manley, H., Akkas, H., Hajdu, N., Azab, H., Kaminski, G., Nilsonne, G., Anjum, G., Travaglino, G. A., Feldman, G., Pfuhl, G., Czarnek, G., Marcu, G. M., Hofer, G., Banik, G., Adetula, G. A., Bijlstra, G., Verbruggen, F., Kung, F. Y. H., Martela, F., Foroni, F., Forest, J., Singer, G., Muchembled, F., Azevedo, F., Mosannenzadeh, F., Marinova, E., Štrukelj, E., Etebari, Z., Baskin, E., Garcia, E. O. L., Musser, E., van Steenkiste, I. M. M., Bradshaw, E. L., Ahn, E. R., Quested, E., Pronizius, E., Jackson, E. A., Manunta, E., Agadullina, E., Šakan, D., Dursun, P., Dujols, O., Dubrov, D., Willis, M., Tümer, M., Beaudry, J. L., Popović, D., Dunleavy, D., Djamai, I., Krupić, D., Herrera, D., Vega, D., Du, H., Mola, D., Chakarova, D., Davis, W. E., Holford, D. L., Lewis, D. M. G., Vaidis, D. C., Hausman Ozery, D., Zambrano Ricaurte, D., Storage, D., Sousa, D., Serrato Alvarez, D., Boller, D., Dalla Rosa, A., Dimova, D., Marko, D., Moreau, D., Reeck, C., Correia, R. C., Whitt, C. M., Lamm, C., Singh Solorzano, C., von Bastian, C.C., Sutherland, C. A. M., Overkott, C., Aberson, C. L., Wang, C., Niemiec, C. P., Reimer, C., Karashiali, C., Noone, C., Chiu, F., Picciocchi, C., Eben, C., Brownlow, C., Karaarslan, C., Cellini, N., Esteban-Serna, C., Reyna, C., Ferreyra, C., Batres, C., Li, R., Grano, C., Carpentier, J., Tamnes, C. K., Fu, C. H. Y., Ishkhanyan, B., Bylinina, L., Jaeger, B., Bundt, C., Bulut Allred, T., Vermote, B. J., Bokkour, A., Bogatyreva, N., Shi, J., Chopik, W. J., Antazo, B., Becker, M., Bayyat, M. M., Cocco, B., Chou, W-L., Barkoukis, V., Aczel, B., Baklanova, E., Bai, H., Balci, B. B., Babinčák, P., Soenens, B., Dixson, B. J. W., Mokady, A., Kappes, H. B., Atari, M., Szala, A., Szabelska, A., Aruta, J. J. B., Domurat, A., Arinze, N. C., Modena, A., Adiguzel, A., Monajem, A., El Arabi, K. A., Özdoğru, A. A., Rothbaum, A. O., Torres, A. J. O., Theodoropoulou, A., Skowronek, A., Jurković, A. P., Singh, A., Kassianos, A. P., Findor, A., Hartanto, A., Thibault Landry, A., Ferreira, A., Caetano Santos, A., De la Rosa-Gomez, A., Gourdon-Kanhukamwe, A., Luxon, A. M., Todsen, A. L., Karababa, A., Janak, A., Pilato, A., Bran, A., Tullett, A. M., Kuzminska, A. O., Krafnick, A. J., Urooj, A., Khaoudi, A., Ahmed, A., Groyecka-Bernard, A., Askelund, A. D., Adetula, A., Belaus, A., Charyate, A. C., Wichman, A. L., Stoyanova, A., Greenburgh, A., Thomas, A. G., Arvanitis, A., Forscher, P. S., Mallik, P. R., Primbs, M. A., Miller, J. K., Moshontz, H., Urry, H. L., IJzerman, H., Basnight-Brown, D. M., Chartier, C. R., Buchanan, E. M., Coles, N. A., MÜ, Eğitim Fakültesi, Eğitim Bilimleri Bölümü, Kocalar, Halil Emre, Faculdade de Psicologia e de Ciências da Educação, Organizational Psychology, Jernsäther, Teodor [0000-0002-7030-3299], Tatachari, Srinivasan [0000-0003-1838-2361], Geiger, Sandra J [0000-0002-3262-5609], Butt, Muhammad Mussaffa [0000-0001-5271-111X], Varella, Marco A C [0000-0002-7274-7360], Stephen, Ian D [0000-0001-9714-8295], Kaminski, Gwenael [0000-0001-5300-5655], Bai, Hui [0000-0003-2671-5955], Coles, Nicholas A [0000-0001-8583-5610], Apollo - University of Cambridge Repository, Center Ph. D. Students, Department of Social Psychology, Tilburg University, and Medical and Clinical Psychology
Subjects: Nudges, Behaviour Change and Well-being, ddc:150, 230 Affective Neuroscience, SDG 3 - Good Health and Well-being, message framing, anxiety, nudges, COVID-19, Message framing, General Medicine, Anxiety
Abstract: Contains fulltext : 284232.pdf (Publisher’s version ) (Closed access) The COVID-19 pandemic (and its aftermath) highlights a critical need to communicate health information effectively to the global public. Given that subtle differences in information framing can have meaningful effects on behavior, behavioral science research highlights a pressing question: Is it more effective to frame COVID-19 health messages in terms of potential losses (e.g., "If you do not practice these steps, you can endanger yourself and others") or potential gains (e.g., "If you practice these steps, you can protect yourself and others")? Collecting data in 48 languages from 15,929 participants in 84 countries, we experimentally tested the effects of message framing on COVID-19-related judgments, intentions, and feelings. Loss- (vs. gain-) framed messages increased self-reported anxiety among participants cross-nationally with little-to-no impact on policy attitudes, behavioral intentions, or information seeking relevant to pandemic risks. These results were consistent across 84 countries, three variations of the message framing wording, and 560 data processing and analytic choices. Thus, results provide an empirical answer to a global communication question and highlight the emotional toll of loss-framed messages. Critically, this work demonstrates the importance of considering unintended affective consequences when evaluating nudge-style interventions. 26 p.
Published: 2022

37. Persistent Non-Gaussian Structure in the Image of Sagittarius A* at 86 GHz

Author: Issaoun, S., primary, Johnson, M. D., additional, Blackburn, L., additional, Broderick, A., additional, Tiede, P., additional, Wielgus, M., additional, Doeleman, S. S., additional, Falcke, H., additional, Akiyama, K., additional, Bower, G. C., additional, Brinkerink, C. D., additional, Chael, A., additional, Cho, I., additional, Gómez, J. L., additional, Hernández-Gómez, A., additional, Hughes, D., additional, Kino, M., additional, Krichbaum, T. P., additional, Liuzzo, E., additional, Loinard, L., additional, Markoff, S., additional, Marrone, D. P., additional, Mizuno, Y., additional, Moran, J. M., additional, Pidopryhora, Y., additional, Ros, E., additional, Rygl, K., additional, Shen, Z.-Q., additional, and Wagner, J., additional
Published: 2021
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38. First M87 Event Horizon Telescope Results. VIII. Magnetic Field Structure near the Event Horizon

Author: Akiyama, K. Algaba, J.C. Alberdi, A. Alef, W. Anantua, R. Asada, K. Azulay, R. Baczko, A.-K. Ball, D. Baloković, M. Barrett, J. Benson, B.A. Bintley, D. Blackburn, L. Blundell, R. Boland, W. Bouman, K.L. Bower, G.C. Boyce, H. Bremer, M. Brinkerink, C.D. Brissenden, R. Britzen, S. Broderick, A.E. Broguiere, D. Bronzwaer, T. Byun, D.-Y. Carlstrom, J.E. Chael, A. Chan, C.-K. Chatterjee, S. Chatterjee, K. Chen, M.-T. Chen, Y. Chesler, P.M. Cho, I. Christian, P. Conway, J.E. Cordes, J.M. Crawford, T.M. Crew, G.B. Cruz-Osorio, A. Cui, Y. Davelaar, J. De Laurentis, M. Deane, R. Dempsey, J. Desvignes, G. Dexter, J. Doeleman, S.S. Eatough, R.P. Falcke, H. Farah, J. Fish, V.L. Fomalont, E. Ford, H.A. Fraga-Encinas, R. Friberg, P. Fromm, C.M. Fuentes, A. Galison, P. Gammie, C.F. Garciá, R. Gelles, Z. Gentaz, O. Georgiev, B. Goddi, C. Gold, R. Gómez, J.L. Gómez-Ruiz, A.I. Gu, M. Gurwell, M. Hada, K. Haggard, D. Hecht, M.H. Hesper, R. Himwich, E. Ho, L.C. Ho, P. Honma, M. Huang, C.-W.L. Huang, L. Hughes, D.H. Ikeda, S. Inoue, M. Issaoun, S. James, D.J. Jannuzi, B.T. Janssen, M. Jeter, B. Jiang, W. Jimenez-Rosales, A. Johnson, M.D. Jorstad, S. Jung, T. Karami, M. Karuppusamy, R. Kawashima, T. Keating, G.K. Kettenis, M. Kim, D.-J. Kim, J.-Y. Kim, J. Kim, J. Kino, M. Koay, J.Y. Kofuji, Y. Koch, P.M. Koyama, S. Kramer, M. Kramer, C. Krichbaum, T.P. Kuo, C.-Y. Lauer, T.R. Lee, S.-S. Levis, A. Li, Y.-R. Li, Z. Lindqvist, M. Lico, R. Lindahl, G. Liu, J. Liu, K. Liuzzo, E. Lo, W.-P. Lobanov, A.P. Loinard, L. Lonsdale, C. Lu, R.-S. Macdonald, N.R. Mao, J. Marchili, N. Markoff, S. Marrone, D.P. Marscher, A.P. Martí-Vidal, I. Matsushita, S. Matthews, L.D. Medeiros, L. Menten, K.M. Mizuno, I. Mizuno, Y. Moran, J.M. Moriyama, K. Moscibrodzka, M. Müller, C. Musoke, G. Mejiás, A.M. Michalik, D. Nadolski, A. Nagai, H. Nagar, N.M. Nakamura, M. Narayan, R. Narayanan, G. Natarajan, I. Nathanail, A. Neilsen, J. Neri, R. Ni, C. Noutsos, A. Nowak, M.A. Okino, H. Olivares, H. Ortiz-León, G.N. Oyama, T. zel, F. Palumbo, D.C.M. Park, J. Patel, N. Pen, U.-L. Pesce, D.W. Piétu, V. Plambeck, R. Popstefanija, A. Porth, O. Pötzl, F.M. Prather, B. Preciado-López, J.A. Psaltis, D. Pu, H.-Y. Ramakrishnan, V. Rao, R. Rawlings, M.G. Raymond, A.W. Rezzolla, L. Ricarte, A. Ripperda, B. Roelofs, F. Rogers, A. Ros, E. Rose, M. Roshanineshat, A. Rottmann, H. Roy, A.L. Ruszczyk, C. Rygl, K.L.J. Sánchez, S. Sánchez-Arguelles, D. Sasada, M. Savolainen, T. Schloerb, F.P. Schuster, K.-F. Shao, L. Shen, Z. Small, D. Sohn, B.W. Soohoo, J. Sun, H. Tazaki, F. Tetarenko, A.J. Tiede, P. Tilanus, R.P.J. Titus, M. Toma, K. Torne, P. Trent, T. Traianou, E. Trippe, S. Bemmel, I.V. Van Langevelde, H.J. Van Rossum, D.R. Wagner, J. Ward-Thompson, D. Wardle, J. Weintroub, J. Wex, N. Wharton, R. Wielgus, M. Wong, G.N. Wu, Q. Yoon, D. Young, A. Young, K. Younsi, Z. Yuan, F. Yuan, Y.-F. Zensus, J.A. Zhao, G.-Y. Zhao, S.-S.
Subjects: Astrophysics::High Energy Astrophysical Phenomena, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics::Galaxy Astrophysics
Abstract: Event Horizon Telescope (EHT) observations at 230 GHz have now imaged polarized emission around the supermassive black hole in M87 on event-horizon scales. This polarized synchrotron radiation probes the structure of magnetic fields and the plasma properties near the black hole. Here we compare the resolved polarization structure observed by the EHT, along with simultaneous unresolved observations with the Atacama Large Millimeter/submillimeter Array, to expectations from theoretical models. The low fractional linear polarization in the resolved image suggests that the polarization is scrambled on scales smaller than the EHT beam, which we attribute to Faraday rotation internal to the emission region. We estimate the average density n e ∼ 104-7 cm-3, magnetic field strength B ∼ 1-30 G, and electron temperature T e ∼ (1-12) 1010 K of the radiating plasma in a simple one-zone emission model. We show that the net azimuthal linear polarization pattern may result from organized, poloidal magnetic fields in the emission region. In a quantitative comparison with a large library of simulated polarimetric images from general relativistic magnetohydrodynamic (GRMHD) simulations, we identify a subset of physical models that can explain critical features of the polarimetric EHT observations while producing a relativistic jet of sufficient power. The consistent GRMHD models are all of magnetically arrested accretion disks, where near-horizon magnetic fields are dynamically important. We use the models to infer a mass accretion rate onto the black hole in M87 of (3-20) 10-4 M o˙ yr-1. © 2021. The Author(s). Published by the American Astronomical Society..
Published: 2021

39. A multi-country test of brief reappraisal interventions on emotions during the COVID-19 pandemic

Author: Wang, K. Goldenberg, A. Dorison, C.A. Miller, J.K. Uusberg, A. Lerner, J.S. Gross, J.J. Agesin, B.B. Bernardo, M. Campos, O. Eudave, L. Grzech, K. Ozery, D.H. Jackson, E.A. Garcia, E.O.L. Drexler, S.M. Jurković, A.P. Rana, K. Wilson, J.P. Antoniadi, M. Desai, K. Gialitaki, Z. Kushnir, E. Nadif, K. Bravo, O.N. Nauman, R. Oosterlinck, M. Pantazi, M. Pilecka, N. Szabelska, A. van Steenkiste, I.M.M. Filip, K. Bozdoc, A.I. Marcu, G.M. Agadullina, E. Adamkovič, M. Roczniewska, M. Reyna, C. Kassianos, A.P. Westerlund, M. Ahlgren, L. Pöntinen, S. Adetula, G.A. Dursun, P. Arinze, A.I. Arinze, N.C. Ogbonnaya, C.E. Ndukaihe, I.L.G. Dalgar, I. Akkas, H. Macapagal, P.M. Lewis, S. Metin-Orta, I. Foroni, F. Willis, M. Santos, A.C. Mokady, A. Reggev, N. Kurfali, M.A. Vasilev, M.R. Nock, N.L. Parzuchowski, M. Espinoza Barría, M.F. Vranka, M. Kohlová, M.B. Ropovik, I. Harutyunyan, M. Wang, C. Yao, E. Becker, M. Manunta, E. Kaminski, G. Marko, D. Evans, K. Lewis, D.M.G. Findor, A. Landry, A.T. Aruta, J.J.B. Ortiz, M.S. Vally, Z. Pronizius, E. Voracek, M. Lamm, C. Grinberg, M. Li, R. Valentova, J.V. Mioni, G. Cellini, N. Chen, S.-C. Zickfeld, J. Moon, K. Azab, H. Levy, N. Karababa, A. Beaudry, J.L. Boucher, L. Collins, W.M. Todsen, A.L. van Schie, K. Vintr, J. Bavolar, J. Kaliska, L. Križanić, V. Samojlenko, L. Pourafshari, R. Geiger, S.J. Beitner, J. Warmelink, L. Ross, R.M. Stephen, I.D. Hostler, T.J. Azouaghe, S. McCarthy, R. Szala, A. Grano, C. Solorzano, C.S. Anjum, G. Jimenez-Leal, W. Bradford, M. Pérez, L.C. Cruz Vásquez, J.E. Galindo-Caballero, O.J. Vargas-Nieto, J.C. Kácha, O. Arvanitis, A. Xiao, Q. Cárcamo, R. Zorjan, S. Tajchman, Z. Vilares, I. Pavlacic, J.M. Kunst, J.R. Tamnes, C.K. von Bastian, C.C. Atari, M. Sharifian, M.H. Hricova, M. Kačmár, P. Schrötter, J. Rahal, R.-M. Cohen, N. FatahModarres, S. Zrimsek, M. Zakharov, I. Koehn, M.A. Esteban-Serna, C. Calin-Jageman, R.J. Krafnick, A.J. Štrukelj, E. Isager, P.M. Urban, J. Silva, J.R. Martončik, M. Očovaj, S.B. Šakan, D. Kuzminska, A.O. Djordjevic, J.M. Almeida, I.A.T. Ferreira, A. Lazarevic, L.B. Manley, H. Ricaurte, D.Z. Monteiro, R.P. Etabari, Z. Musser, E. Dunleavy, D. Chou, W. Godbersen, H. Ruiz-Fernández, S. Reeck, C. Batres, C. Kirgizova, K. Muminov, A. Azevedo, F. Alvarez, D.S. Butt, M.M. Lee, J.M. Chen, Z. Verbruggen, F. Ziano, I. Tümer, M. Charyate, A.C.A. Dubrov, D. Tejada Rivera, M.C.M.C. Aberson, C. Pálfi, B. Maldonado, M.A. Hubena, B. Sacakli, A. Ceary, C.D. Richard, K.L. Singer, G. Perillo, J.T. Ballantyne, T. Cyrus-Lai, W. Fedotov, M. Du, H. Wielgus, M. Pit, I.L. Hruška, M. Sousa, D. Aczel, B. Szaszi, B. Adamus, S. Barzykowski, K. Micheli, L. Schmidt, N.-D. Zsido, A.N. Paruzel-Czachura, M. Bialek, M. Kowal, M. Sorokowska, A. Misiak, M. Mola, D. Ortiz, M.V. Correa, P.S. Belaus, A. Muchembled, F. Ribeiro, R.R. Arriaga, P. Oliveira, R. Vaughn, L.A. Szwed, P. Kossowska, M. Czarnek, G. Kielińska, J. Antazo, B. Betlehem, R. Stieger, S. Nilsonne, G. Simonovic, N. Taber, J. Gourdon-Kanhukamwe, A. Domurat, A. Ihaya, K. Yamada, Y. Urooj, A. Gill, T. Čadek, M. Bylinina, L. Messerschmidt, J. Kurfalı, M. Adetula, A. Baklanova, E. Albayrak-Aydemir, N. Kappes, H.B. Gjoneska, B. House, T. Jones, M.V. Berkessel, J.B. Chopik, W.J. Çoksan, S. Seehuus, M. Khaoudi, A. Bokkour, A. El Arabi, K.A. Djamai, I. Iyer, A. Parashar, N. Adiguzel, A. Kocalar, H.E. Bundt, C. Norton, J.O. Papadatou-Pastou, M. De la Rosa-Gomez, A. Ankushev, V. Bogatyreva, N. Grigoryev, D. Ivanov, A. Prusova, I. Romanova, M. Sarieva, I. Terskova, M. Hristova, E. Kadreva, V.H. Janak, A. Schei, V. Sverdrup, T.E. Askelund, A.D. Pineda, L.M.S. Krupić, D. Levitan, C.A. Johannes, N. Ouherrou, N. Say, N. Sinkolova, S. Janjić, K. Stojanovska, M. Stojanovska, D. Khosla, M. Thomas, A.G. Kung, F.Y.H. Bijlstra, G. Mosannenzadeh, F. Balci, B.B. Reips, U.-D. Baskin, E. Ishkhanyan, B. Czamanski-Cohen, J. Dixson, B.J.W. Moreau, D. Sutherland, C.A.M. Chuan-Peng, H. Noone, C. Flowe, H. Anne, M. Janssen, S.M.J. Topor, M. Majeed, N.M. Kunisato, Y. Yu, K. Daches, S. Hartanto, A. Vdovic, M. Anton-Boicuk, L. Forbes, P.A.G. Kamburidis, J. Marinova, E. Nedelcheva-Datsova, M. Rachev, N.R. Stoyanova, A. Schmidt, K. Suchow, J.W. Koptjevskaja-Tamm, M. Jernsäther, T. Olofsson, J.K. Bialobrzeska, O. Marszalek, M. Tatachari, S. Afhami, R. Law, W. Antfolk, J. Žuro, B. Van Doren, N. Soto, J.A. Searston, R. Miranda, J. Damnjanović, K. Yeung, S.K. Krupić, D. Hoyer, K. Jaeger, B. Ren, D. Pfuhl, G. Klevjer, K. Corral-Frías, N.S. Frias-Armenta, M. Lucas, M.Y. Torres, A.O. Toro, M. Delgado, L.G.J. Vega, D. Solas, S.Á. Vilar, R. Massoni, S. Frizzo, T. Bran, A. Vaidis, D.C. Vieira, L. Paris, B. Capizzi, M. Coelho, G.L.H. Greenburgh, A. Whitt, C.M. Tullett, A.M. Du, X. Volz, L. Bosma, M.J. Karaarslan, C. Sarıoğuz, E. Allred, T.B. Korbmacher, M. Colloff, M.F. Lima, T.J.S. Ribeiro, M.F.F. Verharen, J.P.H. Karekla, M. Karashiali, C. Sunami, N. Jaremka, L.M. Storage, D. Habib, S. Studzinska, A. Hanel, P.H.P. Holford, D.L. Sirota, M. Wolfe, K. Chiu, F. Theodoropoulou, A. Ahn, E.R. Lin, Y. Westgate, E.C. Brohmer, H. Hofer, G. Dujols, O. Vezirian, K. Feldman, G. Travaglino, G.A. Ahmed, A. Li, M. Bosch, J. Torunsky, N. Bai, H. Manavalan, M. Song, X. Walczak, R.B. Zdybek, P. Friedemann, M. Rosa, A.D. Kozma, L. Alves, S.G. Lins, S. Pinto, I.R. Correia, R.C. Babinčák, P. Banik, G. Rojas-Berscia, L.M. Varella, M.A.C. Uttley, J. Beshears, J.E. Thommesen, K.K. Behzadnia, B. Geniole, S.N. Silan, M.A. Maturan, P.L.G. Vilsmeier, J.K. Tran, U.S. Izquierdo, S.M. Mensink, M.C. Sorokowski, P. Groyecka-Bernard, A. Radtke, T. Adoric, V.C. Carpentier, J. Özdoğru, A.A. Joy-Gaba, J.A. Hedgebeth, M.V. Ishii, T. Wichman, A.L. Röer, J.P. Ostermann, T. Davis, W.E. Suter, L. Papachristopoulos, K. Zabel, C. Ebersole, C.R. Chartier, C.R. Mallik, P.R. Urry, H.L. Buchanan, E.M. Coles, N.A. Primbs, M.A. Basnight-Brown, D.M. IJzerman, H. Forscher, P.S. Moshontz, H.
Abstract: The COVID-19 pandemic has increased negative emotions and decreased positive emotions globally. Left unchecked, these emotional changes might have a wide array of adverse impacts. To reduce negative emotions and increase positive emotions, we tested the effectiveness of reappraisal, an emotion-regulation strategy that modifies how one thinks about a situation. Participants from 87 countries and regions (n = 21,644) were randomly assigned to one of two brief reappraisal interventions (reconstrual or repurposing) or one of two control conditions (active or passive). Results revealed that both reappraisal interventions (vesus both control conditions) consistently reduced negative emotions and increased positive emotions across different measures. Reconstrual and repurposing interventions had similar effects. Importantly, planned exploratory analyses indicated that reappraisal interventions did not reduce intentions to practice preventive health behaviours. The findings demonstrate the viability of creating scalable, low-cost interventions for use around the world. Protocol registration: The stage 1 protocol for this Registered Report was accepted in principle on 12 May 2020. The protocol, as accepted by the journal, can be found at https://doi.org/10.6084/m9.figshare.c.4878591.v1 © 2021, The Author(s), under exclusive licence to Springer Nature Limited.
Published: 2021

40. Broadband Multi-wavelength Properties of M87 during the 2017 Event Horizon Telescope Campaign

Author: Algaba, J.C. Anczarski, J. Asada, K. Baloković, M. Chandra, S. Cui, Y.-Z. Falcone, A.D. Giroletti, M. Goddi, C. Hada, K. Haggard, D. Jorstad, S. Kaur, A. Kawashima, T. Keating, G. Kim, J.-Y. Kino, M. Komossa, S. Kravchenko, E.V. Krichbaum, T.P. Lee, S.-S. Lu, R.-S. Lucchini, M. Markoff, S. Neilsen, J. Nowak, M.A. Park, J. Principe, G. Ramakrishnan, V. Reynolds, M.T. Sasada, M. Savchenko, S.S. Williamson, K.E. Akiyama, K. Alberdi, A. Alef, W. Anantua, R. Azulay, R. Baczko, A.-K. Ball, D. Barrett, J. Bintley, D. Benson, B.A. Blackburn, L. Blundell, R. Boland, W. Bouman, K.L. Bower, G.C. Boyce, H. Bremer, M. Brinkerink, C.D. Brissenden, R. Britzen, S. Broderick, A.E. Broguiere, D. Bronzwaer, T. Byun, D.-Y. Carlstrom, J.E. Chael, A. Chan, C.-K. Chatterjee, S. Chatterjee, K. Chen, M.-T. Chen, Y. Chesler, P.M. Cho, I. Christian, P. Conway, J.E. Cordes, J.M. Crawford, T.M. Crew, G.B. Cruz-Osorio, A. Davelaar, J. De Laurentis, M. Deane, R. Dempsey, J. Desvignes, G. Dexter, J. Doeleman, S.S. Eatough, R.P. Falcke, H. Farah, J. Fish, V.L. Fomalont, E. Ford, H.A. Fraga-Encinas, R. Friberg, P. Fromm, C.M. Fuentes, A. Galison, P. Gammie, C.F. García, R. Gentaz, O. Georgiev, B. Gold, R. Gómez, J.L. Gómez-Ruiz, A.I. Gu, M. Gurwell, M. Hecht, M.H. Hesper, R. Ho, L.C. Ho, P. Honma, M. Huang, C.-W.L. Huang, L. Hughes, D.H. Ikeda, S. Inoue, M. Issaoun, S. James, D.J. Jannuzi, B.T. Janssen, M. Jeter, B. Jiang, W. Jiménez-Rosales, A. Johnson, M.D. Jung, T. Karami, M. Karuppusamy, R. Kettenis, M. Kim, D.-J. Kim, J. Kim, J. Koay, J.Y. Kofuji, Y. Koch, P.M. Koyama, S. Kramer, M. Kramer, C. Kuo, C.-Y. Lauer, T.R. Levis, A. Li, Y.-R. Li, Z. Lindqvist, M. Lico, R. Lindahl, G. Liu, J. Liu, K. Liuzzo, E. Lo, W.-P. Lobanov, A.P. Loinard, L. Lonsdale, C. Macdonald, N.R. Mao, J. Marchili, N. Marrone, D.P. Marscher, A.P. Martí-Vidal, I. Matsushita, S. Matthews, L.D. Medeiros, L. Menten, K.M. Mizuno, I. Mizuno, Y. Moran, J.M. Moriyama, K. Moscibrodzka, M. Müller, C. Musoke, G. Mejías, A.M. Nagai, H. Nagar, N.M. Nakamura, M. Narayan, R. Narayanan, G. Natarajan, I. Nathanail, A. Neri, R. Ni, C. Noutsos, A. Okino, H. Olivares, H. Ortiz-León, G.N. Oyama, T. Ozel, F. Palumbo, D.C.M. Patel, N. Pen, U.-L. Pesce, D.W. Piétu, V. Plambeck, R. Popstefanija, A. Porth, O. Pötzl, F.M. Prather, B. Preciado-López, J.A. Psaltis, D. Pu, H.-Y. Rao, R. Rawlings, M.G. Raymond, A.W. Rezzolla, L. Ricarte, A. Ripperda, B. Roelofs, F. Rogers, A. Ros, E. Rose, M. Roshanineshat, A. Rottmann, H. Roy, A.L. Ruszczyk, C. Rygl, K.L.J. Sánchez, S. Sánchez-Arguelles, D. Savolainen, T. Schloerb, F.P. Schuster, K.-F. Shao, L. Shen, Z. Small, D. Sohn, B.W. Soohoo, J. Sun, H. Tazaki, F. Tetarenko, A.J. Tiede, P. Tilanus, R.P.J. Titus, M. Toma, K. Torne, P. Trent, T. Traianou, E. Trippe, S. Van Bemmel, I. Van Langevelde, H.J. Van Rossum, D.R. Wagner, J. Ward-Thompson, D. Wardle, J. Weintroub, J. Wex, N. Wharton, R. Wielgus, M. Wong, G.N. Wu, Q. Yoon, D. Young, A. Young, K. Younsi, Z. Yuan, F. Yuan, Y.-F. Zensus, J.A. Zhao, G.-Y. Zhao, S.-S. Principe, G. Giroletti, M. D'Ammando, F. Orienti, M. Abdalla, H. Adam, R. Aharonian, F. Benkhali, F.A. Angüner, E.O. Arcaro, C. Armand, C. Armstrong, T. Ashkar, H. Backes, M. Baghmanyan, V. Barbosa Martins, V. Barnacka, A. Barnard, M. Becherini, Y. Berge, D. Bernlöhr, K. Bi, B. Böttcher, M. Boisson, C. Bolmont, J. De Bony De Lavergne, M. Breuhaus, M. Brun, F. Brun, P. Bryan, M. Büchele, M. Bulik, T. Bylund, T. Caroff, S. Carosi, A. Casanova, S. Chand, T. Chen, A. Cotter, G. Curyło, M. Damascene Mbarubucyeye, J. Davids, I.D. Davies, J. Deil, C. Devin, J. Dewilt, P. Dirson, L. Djannati-Ataï, A. Dmytriiev, A. Donath, A. Doroshenko, V. Duffy, C. Dyks, J. Egberts, K. Eichhorn, F. Einecke, S. Emery, G. Ernenwein, J.-P. Feijen, K. Fegan, S. Fiasson, A. De Clairfontaine, G.F. Fontaine, G. Funk, S. Füßling, M. Gabici, S. Gallant, Y.A. Giavitto, G. Giunti, L. Glawion, D. Glicenstein, J.F. Gottschall, D. Grondin, M.-H. Hahn, J. Haupt, M. Hermann, G. Hinton, J.A. Hofmann, W. Hoischen, C. Holch, T.L. Holler, M. Hörbe, M. Horns, D. Huber, D. Jamrozy, M. Jankowsky, D. Jankowsky, F. Jardin-Blicq, A. Joshi, V. Jung-Richardt, I. Kasai, E. Kastendieck, M.A. Katarzyński, K. Katz, U. Khangulyan, D. Khélifi, B. Klepser, S. Kluźniak, W. Komin, N. Konno, R. Kosack, K. Kostunin, D. Kreter, M. Lamanna, G. Lemiere, A. Lemoine-Goumard, M. Lenain, J.-P. Levy, C. Lohse, T. Lypova, I. Mackey, J. Majumdar, J. Malyshev, D. Malyshev, D. Marandon, V. Marchegiani, P. Marcowith, A. Mares, A. Martí-Devesa, G. Marx, R. Maurin, G. Meintjes, P.J. Meyer, M. Moderski, R. Mohamed, M. Mohrmann, L. Montanari, A. Moore, C. Morris, P. Moulin, E. Muller, J. Murach, T. Nakashima, K. Nayerhoda, A. De Naurois, M. Ndiyavala, H. Niederwanger, F. Niemiec, J. Oakes, L. O'Brien, P. Odaka, H. Ohm, S. Olivera-Nieto, L. De Ona Wilhelmi, E. Ostrowski, M. Panter, M. Panny, S. Parsons, R.D. Peron, G. Peyaud, B. Piel, Q. Pita, S. Poireau, V. Noel, A.P. Prokhorov, D.A. Prokoph, H. Pühlhofer, G. Punch, M. Quirrenbach, A. Rauth, R. Reichherzer, P. Reimer, A. Reimer, O. Remy, Q. Renaud, M. Rieger, F. Rinchiuso, L. Romoli, C. Rowell, G. Rudak, B. Ruiz-Velasco, E. Sahakian, V. Sailer, S. Sanchez, D.A. Santangelo, A. Sasaki, M. Scalici, M. Schutte, H.M. Schwanke, U. Schwemmer, S. Seglar-Arroyo, M. Senniappan, M. Seyffert, A.S. Shafi, N. Shiningayamwe, K. Simoni, R. Sinha, A. Sol, H. Specovius, A. Spencer, S. Spir-Jacob, M. Stawarz, Ł. Sun, L. Steenkamp, R. Stegmann, C. Steinmassl, S. Steppa, C. Takahashi, T. Tavernier, T. Taylor, A.M. Terrier, R. Tiziani, D. Tluczykont, M. Tomankova, L. Trichard, C. Tsirou, M. Tuffs, R. Uchiyama, Y. Van Der Walt, D.J. Van Eldik, C. Van Rensburg, C. Van Soelen, B. Vasileiadis, G. Veh, J. Venter, C. Vincent, P. Vink, J. Völk, H.J. Vuillaume, T. Wadiasingh, Z. Wagner, S.J. Watson, J. Werner, F. White, R. Wierzcholska, A. Wong, Y.W. Yusafzai, A. Zacharias, M. Zanin, R. Zargaryan, D. Zdziarski, A.A. Zech, A. Zhu, S.J. Zorn, J. Zouari, S. Żywucka, N. Acciari, V.A. Ansoldi, S. Antonelli, L.A. Engels, A.A. Artero, M. Asano, K. Baack, D. Babić, A. Baquero, A. De Almeida, U.B. Barrio, J.A. Becerra González, J. Bednarek, W. Bellizzi, L. Bernardini, E. Bernardos, M. Berti, A. Besenrieder, J. Bhattacharyya, W. Bigongiari, C. Biland, A. Blanch, O. Bonnoli, G. Bošnjak, Ž. Busetto, G. Carosi, R. Ceribella, G. Cerruti, M. Chai, Y. Chilingarian, A. Cikota, S. Colak, S.M. Colombo, E. Contreras, J.L. Cortina, J. Covino, S. D'Amico, G. D'Elia, V. Da Vela, P. Dazzi, F. De Angelis, A. De Lotto, B. Delfino, M. Delgado, J. Delgado Mendez, C. Depaoli, D. Di Pierro, F. Di Venere, L. Do Souto Espineira, E. Dominis Prester, D. Donini, A. Dorner, D. Doro, M. Elsaesser, D. Fallah Ramazani, V. Fattorini, A. Ferrara, G. Fonseca, M.V. Font, L. Fruck, C. Fukami, S. García López, R.J. Garczarczyk, M. Gasparyan, S. Gaug, M. Giglietto, N. Giordano, F. Gliwny, P. Godinović, N. Green, J.G. Green, D. Hadasch, D. Hahn, A. Heckmann, L. Herrera, J. Hoang, J. Hrupec, D. Hütten, M. Inada, T. Inoue, S. Ishio, K. Iwamura, Y. Jiménez, I. Jormanainen, J. Jouvin, L. Kajiwara, Y. Karjalainen, M. Kerszberg, D. Kobayashi, Y. Kubo, H. Kushida, J. Lamastra, A. Lelas, D. Leone, F. Lindfors, E. Lombardi, S. Longo, F. López-Coto, R. López-Moya, M. López-Oramas, A. Loporchio, S. Machado De Oliveira Fraga, B. Maggio, C. Majumdar, P. Makariev, M. Mallamaci, M. Maneva, G. Manganaro, M. Mannheim, K. Maraschi, L. Mariotti, M. Martínez, M. Mazin, D. Menchiari, S. Mender, S. Mićanović, S. Miceli, D. Miener, T. Minev, M. Miranda, J.M. Mirzoyan, R. Molina, E. Moralejo, A. Morcuende, D. Moreno, V. Moretti, E. Neustroev, V. Nigro, C. Nilsson, K. Nishijima, K. Noda, K. Nozaki, S. Ohtani, Y. Oka, T. Otero-Santos, J. Paiano, S. Palatiello, M. Paneque, D. Paoletti, R. Paredes, J.M. Pavletić, L. Penil, P. Perennes, C. Persic, M. Moroni, P.G.P. Prandini, E. Priyadarshi, C. Puljak, I. Rhode, W. Ribó, M. Rico, J. Righi, C. Rugliancich, A. Saha, L. Sahakyan, N. Saito, T. Sakurai, S. Satalecka, K. Saturni, F.G. Schleicher, B. Schmidt, K. Schweizer, T. Sitarek, J. Šnidarić, I. Sobczynska, D. Spolon, A. Stamerra, A. Strom, D. Strzys, M. Suda, Y. Surić, T. Takahashi, M. Tavecchio, F. Temnikov, P. Terzić, T. Teshima, M. Tosti, L. Truzzi, S. Tutone, A. Ubach, S. Van Scherpenberg, J. Vanzo, G. Vazquez Acosta, M. Ventura, S. Verguilov, V. Vigorito, C.F. Vitale, V. Vovk, I. Will, M. Wunderlich, C. Zarić, D. Adams, C.B. Benbow, W. Brill, A. Capasso, M. Christiansen, J.L. Chromey, A.J. Daniel, M.K. Errando, M. Farrell, K.A. Feng, Q. Finley, J.P. Fortson, L. Furniss, A. Gent, A. Giuri, C. Hassan, T. Hervet, O. Holder, J. Hughes, G. Humensky, T.B. Jin, W. Kaaret, P. Kertzman, M. Kieda, D. Kumar, S. Lang, M.J. Lundy, M. Maier, G. Moriarty, P. Mukherjee, R. Nieto, D. Nievas-Rosillo, M. O'Brien, S. Ong, R.A. Otte, A.N. Patel, S. Pfrang, K. Pohl, M. Prado, R.R. Pueschel, E. Quinn, J. Ragan, K. Reynolds, P.T. Ribeiro, D. Richards, G.T. Roache, E. Rulten, C. Ryan, J.L. Santander, M. Sembroski, G.H. Shang, R. Weinstein, A. Williams, D.A. Williamson, T.J. Hirota, T. Cui, L. Niinuma, K. Ro, H. Sakai, N. Sawada-Satoh, S. Wajima, K. Wang, N. Liu, X. Yonekura, Y.
Subjects: Astrophysics::High Energy Astrophysical Phenomena, Astrophysics::Cosmology and Extragalactic Astrophysics
Abstract: In 2017, the Event Horizon Telescope (EHT) Collaboration succeeded in capturing the first direct image of the center of the M87 galaxy. The asymmetric ring morphology and size are consistent with theoretical expectations for a weakly accreting supermassive black hole of mass ∼6.5 × 109 M o˙. The EHTC also partnered with several international facilities in space and on the ground, to arrange an extensive, quasi-simultaneous multi-wavelength campaign. This Letter presents the results and analysis of this campaign, as well as the multi-wavelength data as a legacy data repository. We captured M87 in a historically low state, and the core flux dominates over HST-1 at high energies, making it possible to combine core flux constraints with the more spatially precise very long baseline interferometry data. We present the most complete simultaneous multi-wavelength spectrum of the active nucleus to date, and discuss the complexity and caveats of combining data from different spatial scales into one broadband spectrum. We apply two heuristic, isotropic leptonic single-zone models to provide insight into the basic source properties, but conclude that a structured jet is necessary to explain M87's spectrum. We can exclude that the simultaneous γ-ray emission is produced via inverse Compton emission in the same region producing the EHT mm-band emission, and further conclude that the γ-rays can only be produced in the inner jets (inward of HST-1) if there are strongly particle-dominated regions. Direct synchrotron emission from accelerated protons and secondaries cannot yet be excluded. © 2021. The Author(s). Published by the American Astronomical Society..
Published: 2021

41. Constraints on black-hole charges with the 2017 EHT observations of M87∗

Author: Kocherlakota, P. Rezzolla, L. Falcke, H. Fromm, C.M. Kramer, M. Mizuno, Y. Nathanail, A. Olivares, H. Younsi, Z. Akiyama, K. Alberdi, A. Alef, W. Algaba, J.C. Anantua, R. Asada, K. Azulay, R. Baczko, A.-K. Ball, D. Baloković, M. Barrett, J. Benson, B.A. Bintley, D. Blackburn, L. Blundell, R. Boland, W. Bouman, K.L. Bower, G.C. Boyce, H. Bremer, M. Brinkerink, C.D. Brissenden, R. Britzen, S. Broderick, A.E. Broguiere, D. Bronzwaer, T. Byun, D.-Y. Carlstrom, J.E. Chael, A. Chan, C.-K. Chatterjee, S. Chatterjee, K. Chen, M.-T. Chen, Y. Chesler, P.M. Cho, I. Christian, P. Conway, J.E. Cordes, J.M. Crawford, T.M. Crew, G.B. Cruz-Osorio, A. Cui, Y. Davelaar, J. De Laurentis, M. Deane, R. Dempsey, J. Desvignes, G. Doeleman, S.S. Eatough, R.P. Farah, J. Fish, V.L. Fomalont, E. Fraga-Encinas, R. Friberg, P. Ford, H.A. Fuentes, A. Galison, P. Gammie, C.F. García, R. Gentaz, O. Georgiev, B. Goddi, C. Gold, R. Gómez, J.L. Gómez-Ruiz, A.I. Gu, M. Gurwell, M. Hada, K. Haggard, D. Hecht, M.H. Hesper, R. Ho, L.C. Ho, P. Honma, M. Huang, C.-W.L. Huang, L. Hughes, D.H. Ikeda, S. Inoue, M. Issaoun, S. James, D.J. Jannuzi, B.T. Janssen, M. Jeter, B. Jiang, W. Jimenez-Rosales, A. Johnson, M.D. Jorstad, S. Jung, T. Karami, M. Karuppusamy, R. Kawashima, T. Keating, G.K. Kettenis, M. Kim, D.-J. Kim, J.-Y. Kim, J. Kim, J. Kino, M. Koay, J.Y. Kofuji, Y. Koch, P.M. Koyama, S. Kramer, C. Krichbaum, T.P. Kuo, C.-Y. Lauer, T.R. Lee, S.-S. Levis, A. Li, Y.-R. Li, Z. Lindqvist, M. Lico, R. Lindahl, G. Liu, J. Liu, K. Liuzzo, E. Lo, W.-P. Lobanov, A.P. Loinard, L. Lonsdale, C. Lu, R.-S. Macdonald, N.R. Mao, J. Marchili, N. Markoff, S. Marrone, D.P. Marscher, A.P. Martí-Vidal, I. Matsushita, S. Matthews, L.D. Medeiros, L. Menten, K.M. Mizuno, I. Moran, J.M. Moriyama, K. Moscibrodzka, M. Müller, C. Musoke, G. Mejías, A.M. Nagai, H. Nagar, N.M. Nakamura, M. Narayan, R. Narayanan, G. Natarajan, I. Neilsen, J. Neri, R. Ni, C. Noutsos, A. Nowak, M.A. Okino, H. Ortiz-León, G.N. Oyama, T. Özel, F. Palumbo, D.C.M. Park, J. Patel, N. Pen, U.-L. Pesce, D.W. Piétu, V. Plambeck, R. Popstefanija, A. Porth, O. Pötzl, F.M. Prather, B. Preciado-López, J.A. Psaltis, D. Pu, H.-Y. Ramakrishnan, V. Rao, R. Rawlings, M.G. Raymond, A.W. Ricarte, A. Ripperda, B. Roelofs, F. Rogers, A. Ros, E. Rose, M. Roshanineshat, A. Rottmann, H. Roy, A.L. Ruszczyk, C. Rygl, K.L.J. Sánchez, S. Sánchez-Arguelles, D. Sasada, M. Savolainen, T. Schloerb, F.P. Schuster, K.-F. Shao, L. Shen, Z. Small, D. Sohn, B.W. Soohoo, J. Sun, H. Tazaki, F. Tetarenko, A.J. Tiede, P. Tilanus, R.P.J. Titus, M. Toma, K. Torne, P. Trent, T. Traianou, E. Trippe, S. Van Bemmel, I. Van Langevelde, H.J. Van Rossum, D.R. Wagner, J. Ward-Thompson, D. Wardle, J. Weintroub, J. Wex, N. Wharton, R. Wielgus, M. Wong, G.N. Wu, Q. Yoon, D. Young, A. Young, K. Yuan, F. Yuan, Y.-F. Zensus, J.A. Zhao, G.-Y. Zhao, S.-S. (EHT Collaboration)
Subjects: General Relativity and Quantum Cosmology, Astrophysics::High Energy Astrophysical Phenomena
Abstract: Our understanding of strong gravity near supermassive compact objects has recently improved thanks to the measurements made by the Event Horizon Telescope (EHT). We use here the M87∗ shadow size to infer constraints on the physical charges of a large variety of nonrotating or rotating black holes. For example, we show that the quality of the measurements is already sufficient to rule out that M87∗ is a highly charged dilaton black hole. Similarly, when considering black holes with two physical and independent charges, we are able to exclude considerable regions of the space of parameters for the doubly-charged dilaton and the Sen black holes. © 2021 authors. Published by the American Physical Society.
Published: 2021

42. Event Horizon Telescope observations of the jet launching and collimation in Centaurus A

Author: Janssen, M. Falcke, H. Kadler, M. Ros, E. Wielgus, M. Akiyama, K. Baloković, M. Blackburn, L. Bouman, K.L. Chael, A. Chan, C.-K. Chatterjee, K. Davelaar, J. Edwards, P.G. Fromm, C.M. Gómez, J.L. Goddi, C. Issaoun, S. Johnson, M.D. Kim, J. Koay, J.Y. Krichbaum, T.P. Liu, J. Liuzzo, E. Markoff, S. Markowitz, A. Marrone, D.P. Mizuno, Y. Müller, C. Ni, C. Pesce, D.W. Ramakrishnan, V. Roelofs, F. Rygl, K.L.J. van Bemmel, I. Alberdi, A. Alef, W. Algaba, J.C. Anantua, R. Asada, K. Azulay, R. Baczko, A.-K. Ball, D. Barrett, J. Benson, B.A. Bintley, D. Blundell, R. Boland, W. Bower, G.C. Boyce, H. Bremer, M. Brinkerink, C.D. Brissenden, R. Britzen, S. Broderick, A.E. Broguiere, D. Bronzwaer, T. Byun, D.-Y. Carlstrom, J.E. Chatterjee, S. Chen, M.-T. Chen, Y. Chesler, P.M. Cho, I. Christian, P. Conway, J.E. Cordes, J.M. Crawford, T.M. Crew, G.B. Cruz-Osorio, A. Cui, Y. De Laurentis, M. Deane, R. Dempsey, J. Desvignes, G. Dexter, J. Doeleman, S.S. Eatough, R.P. Farah, J. Fish, V.L. Fomalont, E. Ford, H.A. Fraga-Encinas, R. Friberg, P. Fuentes, A. Galison, P. Gammie, C.F. García, R. Gelles, Z. Gentaz, O. Georgiev, B. Gold, R. Gómez-Ruiz, A.I. Gu, M. Gurwell, M. Hada, K. Haggard, D. Hecht, M.H. Hesper, R. Himwich, E. Ho, L.C. Ho, P. Honma, M. Huang, C.-W.L. Huang, L. Hughes, D.H. Ikeda, S. Inoue, M. James, D.J. Jannuzi, B.T. Jeter, B. Jiang, W. Jimenez-Rosales, A. Jorstad, S. Jung, T. Karami, M. Karuppusamy, R. Kawashima, T. Keating, G.K. Kettenis, M. Kim, D.-J. Kim, J.-Y. Kim, J. Kino, M. Kofuji, Y. Koyama, S. Kramer, M. Kramer, C. Kuo, C.-Y. Lauer, T.R. Lee, S.-S. Levis, A. Li, Y.-R. Li, Z. Lindqvist, M. Lico, R. Lindahl, G. Liu, K. Lo, W.-P. Lobanov, A.P. Loinard, L. Lonsdale, C. Lu, R.-S. MacDonald, N.R. Mao, J. Marchili, N. Marscher, A.P. Martí-Vidal, I. Matsushita, S. Matthews, L.D. Medeiros, L. Menten, K.M. Mizuno, I. Moran, J.M. Moriyama, K. Moscibrodzka, M. Musoke, G. Mejías, A.M. Nagai, H. Nagar, N.M. Nakamura, M. Narayan, R. Narayanan, G. Natarajan, I. Nathanail, A. Neilsen, J. Neri, R. Noutsos, A. Nowak, M.A. Okino, H. Olivares, H. Ortiz-León, G.N. Oyama, T. Özel, F. Palumbo, D.C.M. Park, J. Patel, N. Pen, U.-L. Piétu, V. Plambeck, R. PopStefanija, A. Porth, O. Pötzl, F.M. Prather, B. Preciado-López, J.A. Psaltis, D. Pu, H.-Y. Rao, R. Rawlings, M.G. Raymond, A.W. Rezzolla, L. Ricarte, A. Ripperda, B. Rogers, A. Rose, M. Roshanineshat, A. Rottmann, H. Roy, A.L. Ruszczyk, C. Sánchez, S. Sánchez-Arguelles, D. Sasada, M. Savolainen, T. Schloerb, F.P. Schuster, K.-F. Shao, L. Shen, Z. Small, D. Sohn, B.W. SooHoo, J. Sun, H. Tazaki, F. Tetarenko, A.J. Tiede, P. Tilanus, R.P.J. Titus, M. Torne, P. Trent, T. Traianou, E. Trippe, S. van Bemmel, I. van Langevelde, H.J. van Rossum, D.R. Wagner, J. Ward-Thompson, D. Wardle, J. Weintroub, J. Wex, N. Wharton, R. Wong, G.N. Wu, Q. Yoon, D. Young, A. Young, K. Younsi, Z. Yuan, F. Yuan, Y.-F. Zensus, J.A. Zhao, G.-Y. Zhao, S.-S. The Event Horizon Telescope Collaboration
Abstract: Very-long-baseline interferometry (VLBI) observations of active galactic nuclei at millimetre wavelengths have the power to reveal the launching and initial collimation region of extragalactic radio jets, down to 10–100 gravitational radii (rg ≡ GM/c2) scales in nearby sources1. Centaurus A is the closest radio-loud source to Earth2. It bridges the gap in mass and accretion rate between the supermassive black holes (SMBHs) in Messier 87 and our Galactic Centre. A large southern declination of −43° has, however, prevented VLBI imaging of Centaurus A below a wavelength of 1 cm thus far. Here we show the millimetre VLBI image of the source, which we obtained with the Event Horizon Telescope at 228 GHz. Compared with previous observations3, we image the jet of Centaurus A at a tenfold higher frequency and sixteen times sharper resolution and thereby probe sub-lightday structures. We reveal a highly collimated, asymmetrically edge-brightened jet as well as the fainter counterjet. We find that the source structure of Centaurus A resembles the jet in Messier 87 on ~500 rg scales remarkably well. Furthermore, we identify the location of Centaurus A’s SMBH with respect to its resolved jet core at a wavelength of 1.3 mm and conclude that the source’s event horizon shadow4 should be visible at terahertz frequencies. This location further supports the universal scale invariance of black holes over a wide range of masses5,6. © 2021, The Author(s).
Published: 2021

43. Polarimetric Properties of Event Horizon Telescope Targets from ALMA

Author: Goddi, C. Martí-Vidal, I. Messias, H. Bower, G.C. Broderick, A.E. Dexter, J. Marrone, D.P. Moscibrodzka, M. Nagai, H. Algaba, J.C. Asada, K. Crew, G.B. Gómez, J.L. Impellizzeri, C.M.V. Janssen, M. Kadler, M. Krichbaum, T.P. Lico, R. Matthews, L.D. Nathanail, A. Ricarte, A. Ros, E. Younsi, Z. Akiyama, K. Alberdi, A. Alef, W. Anantua, R. Azulay, R. Baczko, A.-K. Ball, D. Baloković, M. Barrett, J. Benson, B.A. Bintley, D. Blackburn, L. Blundell, R. Boland, W. Bouman, K.L. Boyce, H. Bremer, M. Brinkerink, C.D. Brissenden, R. Britzen, S. Broguiere, D. Bronzwaer, T. Byun, D.-Y. Carlstrom, J.E. Chael, A. Chan, C.-K. Chatterjee, S. Chatterjee, K. Chen, M.-T. Chen, Y. Chesler, P.M. Cho, I. Christian, P. Conway, J.E. Cordes, J.M. Crawford, T.M. Cruz-Osorio, A. Cui, Y. Davelaar, J. De Laurentis, M. Deane, R. Dempsey, J. Desvignes, G. Doeleman, S.S. Eatough, R.P. Falcke, H. Farah, J. Fish, V.L. Fomalont, E. Ford, H.A. Fraga-Encinas, R. Freeman, W.T. Friberg, P. Fromm, C.M. Fuentes, A. Galison, P. Gammie, C.F. Garciá, R. Gentaz, O. Georgiev, B. Gold, R. Gómez-Ruiz, A.I. Gu, M. Gurwell, M. Hada, K. Haggard, D. Hecht, M.H. Hesper, R. Ho, L.C. Ho, P. Honma, M. Huang, C.-W.L. Huang, L. Hughes, D.H. Inoue, M. Issaoun, S. James, D.J. Jannuzi, B.T. Jeter, B. Jiang, W. Jimenez-Rosales, A. Johnson, M.D. Jorstad, S. Jung, T. Karami, M. Karuppusamy, R. Kawashima, T. Keating, G.K. Kettenis, M. Kim, D.-J. Kim, J.-Y. Kim, J. Kim, J. Kino, M. Koay, J.Y. Kofuji, Y. Koch, P.M. Koyama, S. Kramer, M. Kramer, C. Kuo, C.-Y. Lauer, T.R. Lee, S.-S. Levis, A. Li, Y.-R. Li, Z. Lindqvist, M. Lindahl, G. Liu, J. Liu, K. Liuzzo, E. Lo, W.-P. Lobanov, A.P. Loinard, L. Lonsdale, C. Lu, R.-S. Macdonald, N.R. Mao, J. Marchili, N. Markoff, S. Marscher, A.P. Matsushita, S. Medeiros, L. Menten, K.M. Mizuno, I. Mizuno, Y. Moran, J.M. Moriyama, K. Müller, C. Musoke, G. Mejiás, A.M. Nagar, N.M. Nakamura, M. Narayan, R. Narayanan, G. Natarajan, I. Neilsen, J. Neri, R. Ni, C. Noutsos, A. Nowak, M.A. Okino, H. Olivares, H. Ortiz-León, G.N. Oyama, T. zel, F. Palumbo, D.C.M. Park, J. Patel, N. Pen, U.-L. Pesce, D.W. Piétu, V. Plambeck, R. Popstefanija, A. Porth, O. Pötzl, F.M. Prather, B. Preciado-López, J.A. Psaltis, D. Pu, H.-Y. Ramakrishnan, V. Rao, R. Rawlings, M.G. Raymond, A.W. Rezzolla, L. Ripperda, B. Roelofs, F. Rogers, A. Rose, M. Roshanineshat, A. Rottmann, H. Roy, A.L. Ruszczyk, C. Rygl, K.L.J. Sánchez, S. Sánchez-Arguelles, D. Sasada, M. Savolainen, T. Schloerb, F.P. Schuster, K.-F. Shao, L. Shen, Z. Small, D. Sohn, B.W. Soohoo, J. Sun, H. Tazaki, F. Tetarenko, A.J. Tiede, P. Tilanus, R.P.J. Titus, M. Toma, K. Torne, P. Trent, T. Traianou, E. Trippe, S. Bemmel, I.V. Van Langevelde, H.J. Van Rossum, D.R. Wagner, J. Ward-Thompson, D. Wardle, J. Weintroub, J. Wex, N. Wharton, R. Wielgus, M. Wong, G.N. Wu, Q. Yoon, D. Young, A. Young, K. Yuan, F. Yuan, Y.-F. Zensus, J.A. Zhao, G.-Y. Zhao, S.-S. Bruni, G. Gopakumar, A. Hernández-Gómez, A. Herrero-Illana, R. Ingram, A. Komossa, S. Kovalev, Y.Y. Muders, D. Perucho, M. Rösch, F. Valtonen, M.
Abstract: We present the results from a full polarization study carried out with the Atacama Large Millimeter/submillimeter Array (ALMA) during the first Very Long Baseline Interferometry (VLBI) campaign, which was conducted in 2017 April in the λ3 mm and λ1.3 mm bands, in concert with the Global mm-VLBI Array (GMVA) and the Event Horizon Telescope (EHT), respectively. We determine the polarization and Faraday properties of all VLBI targets, including Sgr A∗, M87, and a dozen radio-loud active galactic nuclei (AGNs), in the two bands at several epochs in a time window of 10 days. We detect high linear polarization fractions (2%-15%) and large rotation measures (RM > 103.3-105.5 rad m-2), confirming the trends of previous AGN studies at millimeter wavelengths. We find that blazars are more strongly polarized than other AGNs in the sample, while exhibiting (on average) order-of-magnitude lower RM values, consistent with the AGN viewing angle unification scheme. For Sgr A∗ we report a mean RM of (-4.2 0.3) 105 rad m-2 at 1.3 mm, consistent with measurements over the past decade and, for the first time, an RM of (-2.1 0.1) 105 rad m-2 at 3 mm, suggesting that about half of the Faraday rotation at 1.3 mm may occur between the 3 mm photosphere and the 1.3 mm source. We also report the first unambiguous measurement of RM toward the M87 nucleus at millimeter wavelengths, which undergoes significant changes in magnitude and sign reversals on a one year timescale, spanning the range from -1.2 to 0.3 105 rad m-2 at 3 mm and -4.1 to 1.5 105 rad m-2 at 1.3 mm. Given this time variability, we argue that, unlike the case of Sgr A∗, the RM in M87 does not provide an accurate estimate of the mass accretion rate onto the black hole. We put forward a two-component model, comprised of a variable compact region and a static extended region, that can simultaneously explain the polarimetric properties observed by both the EHT (on horizon scales) and ALMA (which observes the combined emission from both components). These measurements provide critical constraints for the calibration, analysis, and interpretation of simultaneously obtained VLBI data with the EHT and GMVA. © 2021. The American Astronomical Society.
Published: 2021

44. A multi-country test of brief reappraisal interventions on emotions during the COVID-19 pandemic

Author: Wang, K., Goldenberg, A., Dorison, C.A., Miller, J.K., Uusberg, A., Lerner, J.S., Gross, J.J., Agesin, B.B., Bernardo, M., Campos, O., Eudave, L., Grzech, K., Ozery, D.H., Jackson, E.A., Garcia, E.O.L., Drexler, S.M., Jurković, A.P., Rana, K., Wilson, J.P., Antoniadi, M., Desai, K., Gialitaki, Z., Kushnir, E., Nadif, K., Bravo, O.N., Nauman, R., Oosterlinck, M., Pantazi, M., Pilecka, N., Szabelska, A., van Steenkiste, I.M.M., Filip, K., Bozdoc, A.I., Marcu, G.M., Agadullina, E., Adamkovič, M., Roczniewska, M., Reyna, C., Kassianos, A.P., Westerlund, M., Ahlgren, L., Pöntinen, S., Adetula, G.A., Dursun, P., Arinze, A.I., Arinze, N.C., Ogbonnaya, C.E., Ndukaihe, I.L.G., Dalgar, I., Akkas, H., Macapagal, P.M., Lewis, S., Metin-Orta, I., Foroni, F., Willis, M., Santos, A.C., Mokady, A., Reggev, N., Kurfali, M.A., Vasilev, M.R., Nock, N.L., Parzuchowski, M., Espinoza Barría, M.F., Vranka, M., Kohlová, M.B., Ropovik, I., Harutyunyan, M., Wang, C., Yao, E., Becker, M., Manunta, E., Kaminski, G., Marko, D., Evans, K., Lewis, D.M.G., Findor, A., Landry, A.T., Aruta, J.J.B., Ortiz, M.S., Vally, Z., Pronizius, E., Voracek, M., Lamm, C., Grinberg, M., Li, R., Valentova, J.V., Mioni, G., Cellini, N., Chen, S-C, Zickfeld, J., Moon, K., Azab, H., Levy, N., Karababa, A., Beaudry, J.L., Boucher, L., Collins, W.M., Todsen, A.L., van Schie, K., Vintr, J., Bavolar, J., Kaliska, L., Križanić, V., Samojlenko, L., Pourafshari, R., Geiger, S.J., Beitner, J., Warmelink, L., Ross, R.M., Stephen, I.D., Hostler, T.J., Azouaghe, S., McCarthy, R., Szala, A., Grano, C., Solorzano, C.S., Anjum, G., Jimenez-Leal, W., Bradford, M., Pérez, L.C., Cruz Vásquez, J.E., Galindo-Caballero, O.J., Vargas-Nieto, J.C., Kácha, O., Arvanitis, A., Xiao, Q., Cárcamo, R., Zorjan, S., Tajchman, Z., Vilares, I., Pavlacic, J.M., Kunst, J.R., Tamnes, C.K., von Bastian, C.C., Atari, M., Sharifian, M., Hricova, M., Kačmár, P., Schrötter, J., Rahal, R-M, Cohen, N., FatahModarres, S., Zrimsek, M., Zakharov, I., Koehn, M.A., Esteban-Serna, C., Calin-Jageman, R.J., Krafnick, A.J., Štrukelj, E., Isager, P.M., Urban, J., Silva, J.R., Martončik, M., Očovaj, S.B., Šakan, D., Kuzminska, A.O., Djordjevic, J.M., Almeida, I.A.T., Ferreira, A., Lazarevic, L.B., Manley, H., Ricaurte, D.Z., Monteiro, R.P., Etabari, Z., Musser, E., Dunleavy, D., Chou, W., Godbersen, H., Ruiz-Fernández, S., Reeck, C., Batres, C., Kirgizova, K., Muminov, A., Azevedo, F., Alvarez, D.S., Butt, M.M., Lee, J.M., Chen, Z., Verbruggen, F., Ziano, I., Tümer, M., Charyate, A.C.A., Dubrov, D., Tejada Rivera, M.d.C.M.C., Aberson, C., Pálfi, B., Maldonado, M.A., Hubena, B., Sacakli, A., Ceary, C.D., Richard, K.L., Singer, G., Perillo, J.T., Ballantyne, T., Cyrus-Lai, W., Fedotov, M., Du, H., Wielgus, M., Pit, I.L., Hruška, M., Sousa, D., Aczel, B., Szaszi, B., Adamus, S., Barzykowski, K., Micheli, L., Schmidt, N-D, Zsido, A.N., Paruzel-Czachura, M., Bialek, M., Kowal, M., Sorokowska, A., Misiak, M., Mola, D., Ortiz, M.V., Correa, P.S., Belaus, A., Muchembled, F., Ribeiro, R.R., Arriaga, P., Oliveira, R., Vaughn, L.A., Szwed, P., Kossowska, M., Czarnek, G., Kielińska, J., Antazo, B., Betlehem, R., Stieger, S., Nilsonne, G., Simonovic, N., Taber, J., Gourdon-Kanhukamwe, A., Domurat, A., Ihaya, K., Yamada, Y., Urooj, A., Gill, T., Čadek, M., Bylinina, L., Messerschmidt, J., Kurfalı, M., Adetula, A., Baklanova, E., Albayrak-Aydemir, N., Kappes, H.B., Gjoneska, B., House, T., Jones, M.V., Berkessel, J.B., Chopik, W.J., Çoksan, S., Seehuus, M., Khaoudi, A., Bokkour, A., El Arabi, K.A., Djamai, I., Iyer, A., Parashar, N., Adiguzel, A., Kocalar, H.E., Bundt, C., Norton, J.O., Papadatou-Pastou, M., De la Rosa-Gomez, A., Ankushev, V., Bogatyreva, N., Grigoryev, D., Ivanov, A., Prusova, I., Romanova, M., Sarieva, I., Terskova, M., Hristova, E., Kadreva, V.H., Janak, A., Schei, V., Sverdrup, T.E., Askelund, A.D., Pineda, L.M.S., Krupić, D., Levitan, C.A., Johannes, N., Ouherrou, N., Say, N., Sinkolova, S., Janjić, K., Stojanovska, M., Stojanovska, D., Khosla, M., Thomas, A.G., Kung, F.Y.H., Bijlstra, G., Mosannenzadeh, F., Balci, B.B., Reips, U-D, Baskin, E., Ishkhanyan, B., Czamanski-Cohen, J., Dixson, B.J.W., Moreau, D., Sutherland, C.A.M., Chuan-Peng, H., Noone, C., Flowe, H., Anne, M., Janssen, S.M.J., Topor, M., Majeed, N.M., Kunisato, Y., Yu, K., Daches, S., Hartanto, A., Vdovic, M., Anton-Boicuk, L., Forbes, P.A.G., Kamburidis, J., Marinova, E., Nedelcheva-Datsova, M., Rachev, N.R., Stoyanova, A., Schmidt, K., Suchow, J.W., Koptjevskaja-Tamm, M., Jernsäther, T., Olofsson, J.K., Bialobrzeska, O., Marszalek, M., Tatachari, S., Afhami, R., Law, W., Antfolk, J., Žuro, B., Van Doren, N., Soto, J.A., Searston, R., Miranda, J., Damnjanović, K., Yeung, S.K., Hoyer, K., Jaeger, B., Ren, D., Pfuhl, G., Klevjer, K., Corral-Frías, N.S., Frias-Armenta, M., Lucas, M.Y., Torres, A.O., Toro, M., Delgado, L.G.J., Vega, D., Solas, S.Á., Vilar, R., Massoni, S., Frizzo, T., Bran, A., Vaidis, D.C., Vieira, L., Paris, B., Capizzi, M., Coelho, G.L.de.H., Greenburgh, A., Whitt, C.M., Tullett, A.M., Du, X., Volz, L., Bosma, M.J., Karaarslan, C., Sarıoğuz, E., Allred, T.B., Korbmacher, M., Colloff, M.F., Lima, T.J.S., Ribeiro, M.F.F., Verharen, J.P.H., Karekla, M., Karashiali, C., Sunami, N., Jaremka, L.M., Storage, D., Habib, S., Studzinska, A., Hanel, P.H.P., Holford, D.L., Sirota, M., Wolfe, K., Chiu, F., Theodoropoulou, A., Ahn, E.R., Lin, Y., Westgate, E.C., Brohmer, H., Hofer, G., Dujols, O., Vezirian, K., Feldman, G., Travaglino, G.A., Ahmed, A., Li, M., Bosch, J., Torunsky, N., Bai, H., Manavalan, M., Song, X., Walczak, R.B., Zdybek, P., Friedemann, M., Rosa, A.D., Kozma, L., Alves, S.G., Lins, S., Pinto, I.R., Correia, R.C., Babinčák, P., Banik, G., Rojas-Berscia, L.M., Varella, M.A.C., Uttley, J., Beshears, J.E., Thommesen, K.K., Behzadnia, B., Geniole, S.N., Silan, M.A., Maturan, P.L.G., Vilsmeier, J.K., Tran, U.S., Izquierdo, S.M., Mensink, M.C., Sorokowski, P., Groyecka-Bernard, A., Radtke, T., Adoric, V.C., Carpentier, J., Özdoğru, A.A., Joy-Gaba, J.A., Hedgebeth, M.V., Ishii, T., Wichman, A.L., Röer, J.P., Ostermann, T., Davis, W.E., Suter, L., Papachristopoulos, K., Zabel, C., Ebersole, C.R., Chartier, C.R., Mallik, P.R., Urry, H.L., Buchanan, E.M., Coles, N.A., Primbs, M.A., Basnight-Brown, D.M., IJzerman, H., Forscher, P.S., Moshontz, H., Wang, K., Goldenberg, A., Dorison, C.A., Miller, J.K., Uusberg, A., Lerner, J.S., Gross, J.J., Agesin, B.B., Bernardo, M., Campos, O., Eudave, L., Grzech, K., Ozery, D.H., Jackson, E.A., Garcia, E.O.L., Drexler, S.M., Jurković, A.P., Rana, K., Wilson, J.P., Antoniadi, M., Desai, K., Gialitaki, Z., Kushnir, E., Nadif, K., Bravo, O.N., Nauman, R., Oosterlinck, M., Pantazi, M., Pilecka, N., Szabelska, A., van Steenkiste, I.M.M., Filip, K., Bozdoc, A.I., Marcu, G.M., Agadullina, E., Adamkovič, M., Roczniewska, M., Reyna, C., Kassianos, A.P., Westerlund, M., Ahlgren, L., Pöntinen, S., Adetula, G.A., Dursun, P., Arinze, A.I., Arinze, N.C., Ogbonnaya, C.E., Ndukaihe, I.L.G., Dalgar, I., Akkas, H., Macapagal, P.M., Lewis, S., Metin-Orta, I., Foroni, F., Willis, M., Santos, A.C., Mokady, A., Reggev, N., Kurfali, M.A., Vasilev, M.R., Nock, N.L., Parzuchowski, M., Espinoza Barría, M.F., Vranka, M., Kohlová, M.B., Ropovik, I., Harutyunyan, M., Wang, C., Yao, E., Becker, M., Manunta, E., Kaminski, G., Marko, D., Evans, K., Lewis, D.M.G., Findor, A., Landry, A.T., Aruta, J.J.B., Ortiz, M.S., Vally, Z., Pronizius, E., Voracek, M., Lamm, C., Grinberg, M., Li, R., Valentova, J.V., Mioni, G., Cellini, N., Chen, S-C, Zickfeld, J., Moon, K., Azab, H., Levy, N., Karababa, A., Beaudry, J.L., Boucher, L., Collins, W.M., Todsen, A.L., van Schie, K., Vintr, J., Bavolar, J., Kaliska, L., Križanić, V., Samojlenko, L., Pourafshari, R., Geiger, S.J., Beitner, J., Warmelink, L., Ross, R.M., Stephen, I.D., Hostler, T.J., Azouaghe, S., McCarthy, R., Szala, A., Grano, C., Solorzano, C.S., Anjum, G., Jimenez-Leal, W., Bradford, M., Pérez, L.C., Cruz Vásquez, J.E., Galindo-Caballero, O.J., Vargas-Nieto, J.C., Kácha, O., Arvanitis, A., Xiao, Q., Cárcamo, R., Zorjan, S., Tajchman, Z., Vilares, I., Pavlacic, J.M., Kunst, J.R., Tamnes, C.K., von Bastian, C.C., Atari, M., Sharifian, M., Hricova, M., Kačmár, P., Schrötter, J., Rahal, R-M, Cohen, N., FatahModarres, S., Zrimsek, M., Zakharov, I., Koehn, M.A., Esteban-Serna, C., Calin-Jageman, R.J., Krafnick, A.J., Štrukelj, E., Isager, P.M., Urban, J., Silva, J.R., Martončik, M., Očovaj, S.B., Šakan, D., Kuzminska, A.O., Djordjevic, J.M., Almeida, I.A.T., Ferreira, A., Lazarevic, L.B., Manley, H., Ricaurte, D.Z., Monteiro, R.P., Etabari, Z., Musser, E., Dunleavy, D., Chou, W., Godbersen, H., Ruiz-Fernández, S., Reeck, C., Batres, C., Kirgizova, K., Muminov, A., Azevedo, F., Alvarez, D.S., Butt, M.M., Lee, J.M., Chen, Z., Verbruggen, F., Ziano, I., Tümer, M., Charyate, A.C.A., Dubrov, D., Tejada Rivera, M.d.C.M.C., Aberson, C., Pálfi, B., Maldonado, M.A., Hubena, B., Sacakli, A., Ceary, C.D., Richard, K.L., Singer, G., Perillo, J.T., Ballantyne, T., Cyrus-Lai, W., Fedotov, M., Du, H., Wielgus, M., Pit, I.L., Hruška, M., Sousa, D., Aczel, B., Szaszi, B., Adamus, S., Barzykowski, K., Micheli, L., Schmidt, N-D, Zsido, A.N., Paruzel-Czachura, M., Bialek, M., Kowal, M., Sorokowska, A., Misiak, M., Mola, D., Ortiz, M.V., Correa, P.S., Belaus, A., Muchembled, F., Ribeiro, R.R., Arriaga, P., Oliveira, R., Vaughn, L.A., Szwed, P., Kossowska, M., Czarnek, G., Kielińska, J., Antazo, B., Betlehem, R., Stieger, S., Nilsonne, G., Simonovic, N., Taber, J., Gourdon-Kanhukamwe, A., Domurat, A., Ihaya, K., Yamada, Y., Urooj, A., Gill, T., Čadek, M., Bylinina, L., Messerschmidt, J., Kurfalı, M., Adetula, A., Baklanova, E., Albayrak-Aydemir, N., Kappes, H.B., Gjoneska, B., House, T., Jones, M.V., Berkessel, J.B., Chopik, W.J., Çoksan, S., Seehuus, M., Khaoudi, A., Bokkour, A., El Arabi, K.A., Djamai, I., Iyer, A., Parashar, N., Adiguzel, A., Kocalar, H.E., Bundt, C., Norton, J.O., Papadatou-Pastou, M., De la Rosa-Gomez, A., Ankushev, V., Bogatyreva, N., Grigoryev, D., Ivanov, A., Prusova, I., Romanova, M., Sarieva, I., Terskova, M., Hristova, E., Kadreva, V.H., Janak, A., Schei, V., Sverdrup, T.E., Askelund, A.D., Pineda, L.M.S., Krupić, D., Levitan, C.A., Johannes, N., Ouherrou, N., Say, N., Sinkolova, S., Janjić, K., Stojanovska, M., Stojanovska, D., Khosla, M., Thomas, A.G., Kung, F.Y.H., Bijlstra, G., Mosannenzadeh, F., Balci, B.B., Reips, U-D, Baskin, E., Ishkhanyan, B., Czamanski-Cohen, J., Dixson, B.J.W., Moreau, D., Sutherland, C.A.M., Chuan-Peng, H., Noone, C., Flowe, H., Anne, M., Janssen, S.M.J., Topor, M., Majeed, N.M., Kunisato, Y., Yu, K., Daches, S., Hartanto, A., Vdovic, M., Anton-Boicuk, L., Forbes, P.A.G., Kamburidis, J., Marinova, E., Nedelcheva-Datsova, M., Rachev, N.R., Stoyanova, A., Schmidt, K., Suchow, J.W., Koptjevskaja-Tamm, M., Jernsäther, T., Olofsson, J.K., Bialobrzeska, O., Marszalek, M., Tatachari, S., Afhami, R., Law, W., Antfolk, J., Žuro, B., Van Doren, N., Soto, J.A., Searston, R., Miranda, J., Damnjanović, K., Yeung, S.K., Hoyer, K., Jaeger, B., Ren, D., Pfuhl, G., Klevjer, K., Corral-Frías, N.S., Frias-Armenta, M., Lucas, M.Y., Torres, A.O., Toro, M., Delgado, L.G.J., Vega, D., Solas, S.Á., Vilar, R., Massoni, S., Frizzo, T., Bran, A., Vaidis, D.C., Vieira, L., Paris, B., Capizzi, M., Coelho, G.L.de.H., Greenburgh, A., Whitt, C.M., Tullett, A.M., Du, X., Volz, L., Bosma, M.J., Karaarslan, C., Sarıoğuz, E., Allred, T.B., Korbmacher, M., Colloff, M.F., Lima, T.J.S., Ribeiro, M.F.F., Verharen, J.P.H., Karekla, M., Karashiali, C., Sunami, N., Jaremka, L.M., Storage, D., Habib, S., Studzinska, A., Hanel, P.H.P., Holford, D.L., Sirota, M., Wolfe, K., Chiu, F., Theodoropoulou, A., Ahn, E.R., Lin, Y., Westgate, E.C., Brohmer, H., Hofer, G., Dujols, O., Vezirian, K., Feldman, G., Travaglino, G.A., Ahmed, A., Li, M., Bosch, J., Torunsky, N., Bai, H., Manavalan, M., Song, X., Walczak, R.B., Zdybek, P., Friedemann, M., Rosa, A.D., Kozma, L., Alves, S.G., Lins, S., Pinto, I.R., Correia, R.C., Babinčák, P., Banik, G., Rojas-Berscia, L.M., Varella, M.A.C., Uttley, J., Beshears, J.E., Thommesen, K.K., Behzadnia, B., Geniole, S.N., Silan, M.A., Maturan, P.L.G., Vilsmeier, J.K., Tran, U.S., Izquierdo, S.M., Mensink, M.C., Sorokowski, P., Groyecka-Bernard, A., Radtke, T., Adoric, V.C., Carpentier, J., Özdoğru, A.A., Joy-Gaba, J.A., Hedgebeth, M.V., Ishii, T., Wichman, A.L., Röer, J.P., Ostermann, T., Davis, W.E., Suter, L., Papachristopoulos, K., Zabel, C., Ebersole, C.R., Chartier, C.R., Mallik, P.R., Urry, H.L., Buchanan, E.M., Coles, N.A., Primbs, M.A., Basnight-Brown, D.M., IJzerman, H., Forscher, P.S., and Moshontz, H.
Abstract: The COVID-19 pandemic has increased negative emotions and decreased positive emotions globally. Left unchecked, these emotional changes might have a wide array of adverse impacts. To reduce negative emotions and increase positive emotions, we tested the effectiveness of reappraisal, an emotion-regulation strategy that modifies how one thinks about a situation. Participants from 87 countries and regions (n = 21,644) were randomly assigned to one of two brief reappraisal interventions (reconstrual or repurposing) or one of two control conditions (active or passive). Results revealed that both reappraisal interventions (vesus both control conditions) consistently reduced negative emotions and increased positive emotions across different measures. Reconstrual and repurposing interventions had similar effects. Importantly, planned exploratory analyses indicated that reappraisal interventions did not reduce intentions to practice preventive health behaviours. The findings demonstrate the viability of creating scalable, low-cost interventions for use around the world.
Published: 2021

45. Broadband Multi-wavelength Properties of M87 during the 2017 Event Horizon Telescope Campaign

Author: Algaba, J. C., Anczarski, J., Asada, K., BalokoviÄ, M., Chandra, S., Cui, Y. -Z, Falcone, A. D., Giroletti, M., Goddi, C., Hada, K., Haggard, D., Jorstad, S., Kaur, A., Kawashima, T., Keating, G., Kim, J. -Y, Kino, M., Komossa, S., Kravchenko, E. V., Krichbaum, T. P., Lee, S. -S, Lu, R. -S, Lucchini, M., Markoff, S., Neilsen, J., Nowak, M. A., Park, J., Principe, G., Ramakrishnan, V., Reynolds, M. T., Sasada, M., Savchenko, S. S., Williamson, K. E., Akiyama, K., Alberdi, A., Alef, W., Anantua, R., Azulay, R., Baczko, A. -K, Ball, D., Barrett, J., Bintley, D., Benson, B. A., Blackburn, L., Blundell, R., Boland, W., Bouman, K. L., Bower, G. C., Boyce, H., Bremer, M., Brinkerink, C. D., Brissenden, R., Britzen, S., Broderick, A. E., Broguiere, D., Bronzwaer, T., Byun, D. -Y, Carlstrom, J. E., Chael, A., Chan, C. -K, Chatterjee, S., Chatterjee, K., Chen, M. -T, Chen, Y., Chesler, P. M., Cho, I., Christian, P., Conway, J. E., Cordes, J. M., Crawford, T. M., Crew, G. B., Cruz-Osorio, A., Davelaar, J., De Laurentis, M., Deane, R., Dempsey, J., Desvignes, G., Dexter, J., Doeleman, S. S., Eatough, R. P., Falcke, H., Farah, J., Fish, V. L., Fomalont, E., Ford, H. A., Fraga-Encinas, R., Friberg, P., Fromm, C. M., Fuentes, A., Galison, P., Gammie, C. F., GarcÃa, R., Gentaz, O., Georgiev, B., Gold, R., GÃ³mez, J. L., GÃ³mez-Ruiz, A. I., Gu, M., Gurwell, M., Hecht, M. H., Hesper, R., Ho, L. C., Ho, P., Honma, M., Huang, C. -WL., Huang, L., Hughes, D. H., Ikeda, S., Inoue, M., Issaoun, S., James, D. J., Jannuzi, B. T., Janssen, M., Jeter, B., Jiang, W., JimÃ©nez-Rosales, A., Johnson, M. D., Jung, T., Karami, M., Karuppusamy, R., Kettenis, M., Kim, D. -J, Kim, J., Koay, J. Y., Kofuji, Y., Koch, P. M., Koyama, S., Kramer, M., Kramer, C., Kuo, C. -Y, Lauer, T. R., Levis, A., Li, Y. -R, Li, Z., Lindqvist, M., Lico, R., Lindahl, G., Liu, J., Liu, K., Liuzzo, E., Lo, W. -P, Lobanov, A. P., Loinard, L., Lonsdale, C., Macdonald, N. R., Mao, J., Marchili, N., Marrone, D. P., Marscher, A. P., MartÃ-Vidal, I., Matsushita, S., Matthews, L. D., Medeiros, L., Menten, K. M., Mizuno, I., Mizuno, Y., Moran, J. M., Moriyama, K., Moscibrodzka, M., MÃŒller, C., Musoke, G., MejÃas, A. M., Nagai, H., Nagar, N. M., Nakamura, M., Narayan, R., Narayanan, G., Natarajan, I., Nathanail, A., Neri, R., Ni, C., Noutsos, A., Okino, H., Olivares, H., Ortiz-LeÃ³n, G. N., Oyama, T., Ozel, F., Palumbo, D. C. M., Patel, N., Pen, U. -L, Pesce, D. W., PiÃ©tu, V., Plambeck, R., Popstefanija, A., Porth, O., PÃ¶tzl, F. M., Prather, B., Preciado-LÃ³pez, J. A., Psaltis, D., Pu, H. -Y, Rao, R., Rawlings, M. G., Raymond, A. W., Rezzolla, L., Ricarte, A., Ripperda, B., Roelofs, F., Rogers, A., Ros, E., Rose, M., Roshanineshat, A., Rottmann, H., Roy, A. L., Ruszczyk, C., Rygl, K. L. J., SÃ¡nchez, S., SÃ¡nchez-Arguelles, D., Savolainen, T., Schloerb, F. P., Schuster, K. -F, Shao, L., Shen, Z., Small, D., Sohn, B. W., Soohoo, J., Sun, H., Tazaki, F., Tetarenko, A. J., Tiede, P., Tilanus, R. P. J., Titus, M., Toma, K., Torne, P., Trent, T., Traianou, E., Trippe, S., Van Bemmel, I., Van Langevelde, H. J., Van Rossum, D. R., Wagner, J., Ward-Thompson, D., Wardle, J., Weintroub, J., Wex, N., Wharton, R., Wielgus, M., Wong, G. N., Wu, Q., Yoon, D., Young, A., Young, K., Younsi, Z., Yuan, F., Yuan, Y. -F, Zensus, J. A., Zhao, G. -Y, Zhao, S. -S, D’Ammando, F., Orienti, M., Abdalla, H., Adam, R., Aharonian, F., Benkhali, F. A., AngÃŒner, E. O., Arcaro, C., Armand, C., Armstrong, T., Ashkar, H., Backes, M., Baghmanyan, V., Barbosa Martins, V., Barnacka, A., Barnard, M., Becherini, Yvonne, Berge, D., BernlÃ¶hr, K., Bi, B., BÃ¶ttcher, M., Boisson, C., Bolmont, J., De Bony De Lavergne, M., Breuhaus, M., Brun, F., Brun, P., Bryan, M., BÃŒchele, M., Bulik, T., Bylund, Tomas, Caroff, S., Carosi, A., Casanova, S., Chand, T., Chen, A., Cotter, G., CuryÅo, M., Damascene Mbarubucyeye, J., Davids, I. D., Davies, J., Deil, C., Devin, J., Dewilt, P., Dirson, L., Djannati-AtaÃ¯, A., Dmytriiev, A., Donath, A., Doroshenko, V., Duffy, C., Dyks, J., Egberts, K., Eichhorn, F., Einecke, S., Emery, G., Ernenwein, J. -P, Feijen, K., Fegan, S., Fiasson, A., De Clairfontaine, G. F., Fontaine, G., Funk, S., FÃŒÃling, M., Gabici, S., Gallant, Y. A., Giavitto, G., Giunti, L., Glawion, D., Glicenstein, J. F., Gottschall, D., Grondin, M. -H, Hahn, J., Haupt, M., Hermann, G., Hinton, J. A., Hofmann, W., Hoischen, C., Holch, T. L., Holler, M., HÃ¶rbe, M., Horns, D., Huber, D., Jamrozy, M., Jankowsky, D., Jankowsky, F., Jardin-Blicq, A., Joshi, V., Jung-Richardt, I., Kasai, E., Kastendieck, M. A., KatarzyÅski, K., Katz, U., Khangulyan, D., KhÃ©lifi, B., Klepser, S., KluÅºniak, W., Komin, N., Konno, R., Kosack, K., Kostunin, D., Kreter, M., Lamanna, G., Lemiere, A., Lemoine-Goumard, M., Lenain, J. -P, Levy, C., Lohse, T., Lypova, I., Mackey, J., Majumdar, J., Malyshev, D., Marandon, V., Marchegiani, P., Marcowith, A., Mares, A., MartÃ-Devesa, G., Marx, R., Maurin, G., Meintjes, P. J., Meyer, M., Moderski, R., Mohamed, M., Mohrmann, L., Montanari, A., Moore, C., Morris, P., Moulin, E., Muller, J., Murach, T., Nakashima, K., Nayerhoda, A., De Naurois, M., Ndiyavala, H., Niederwanger, F., Niemiec, J., Oakes, L., O’Brien, P., Odaka, H., Ohm, S., Olivera-Nieto, L., De Ona Wilhelmi, E., Ostrowski, M., Panter, M., Panny, S., Parsons, R. D., Peron, G., Peyaud, B., Piel, Q., Pita, S., Poireau, V., Noel, A. P., Prokhorov, D. A., Prokoph, H., PÃŒhlhofer, G., Punch, Michael, Quirrenbach, A., Rauth, R., Reichherzer, P., Reimer, A., Reimer, O., Remy, Q., Renaud, M., Rieger, F., Rinchiuso, L., Romoli, C., Rowell, G., Rudak, B., Ruiz-Velasco, E., Sahakian, V., Sailer, S., Sanchez, D. A., Santangelo, A., Sasaki, M., Scalici, M., Schutte, H. M., Schwanke, U., Schwemmer, S., Seglar-Arroyo, M., Senniappan, M., Seyffert, A. S., Shafi, N., Shiningayamwe, K., Simoni, R., Sinha, A., Sol, H., Specovius, A., Spencer, S., Spir-Jacob, M., Stawarz, Å., Sun, L., Steenkamp, R., Stegmann, C., Steinmassl, S., Steppa, C., Takahashi, T., Tavernier, T., Taylor, A. M., Terrier, R., Tiziani, D., Tluczykont, M., Tomankova, L., Trichard, C., Tsirou, M., Tuffs, R., Uchiyama, Y., Van Der Walt, D. J., Van Eldik, C., Van Rensburg, C., Van Soelen, B., Vasileiadis, G., Veh, J., Venter, C., Vincent, P., Vink, J., VÃ¶lk, H. J., Vuillaume, T., Wadiasingh, Z., Wagner, S. J., Watson, J., Werner, F., White, R., Wierzcholska, A., Wong, Y. W., Yusafzai, A., Zacharias, M., Zanin, R., Zargaryan, D., Zdziarski, A. A., Zech, A., Zhu, S. J., Zorn, J., Zouari, S., Å»ywucka, N., Acciari, V. A., Ansoldi, S., Antonelli, L. A., Engels, A. A., Artero, M., Asano, K., Baack, D., BabiÄ, A., Baquero, A., De Almeida, U. B., Barrio, J. A., Becerra GonzÃ¡lez, J., Bednarek, W., Bellizzi, L., Bernardini, E., Bernardos, M., Berti, A., Besenrieder, J., Bhattacharyya, W., Bigongiari, C., Biland, A., Blanch, O., Bonnoli, G., BoÅ¡njak, Åœ., Busetto, G., Carosi, R., Ceribella, G., Cerruti, M., Chai, Y., Chilingarian, A., Cikota, S., Colak, S. M., Colombo, E., Contreras, J. L., Cortina, J., Covino, S., D’Amico, G., D’Elia, V., Da Vela, P., Dazzi, F., De Angelis, A., De Lotto, B., Delfino, M., Delgado, J., Delgado Mendez, C., Depaoli, D., Di Pierro, F., Di Venere, L., Do Souto Espineira, E., Dominis Prester, D., Donini, A., Dorner, D., Doro, M., Elsaesser, D., Fallah Ramazani, V., Fattorini, A., Ferrara, G., Fonseca, M. V., Font, L., Fruck, C., Fukami, S., GarcÃa LÃ³pez, R. J., Garczarczyk, M., Gasparyan, S., Gaug, M., Giglietto, N., Giordano, F., Gliwny, P., GodinoviÄ, N., Green, J. G., Green, D., Hadasch, D., Hahn, A., Heckmann, L., Herrera, J., Hoang, J., Hrupec, D., HÃŒtten, M., Inada, T., Inoue, S., Ishio, K., Iwamura, Y., JimÃ©nez, I., Jormanainen, J., Jouvin, L., Kajiwara, Y., Karjalainen, M., Kerszberg, D., Kobayashi, Y., Kubo, H., Kushida, J., Lamastra, A., Lelas, D., Leone, F., Lindfors, E., Lombardi, S., Longo, F., LÃ³pez-Coto, R., LÃ³pez-Moya, M., LÃ³pez-Oramas, A., Loporchio, S., Machado De Oliveira Fraga, B., Maggio, C., Majumdar, P., Makariev, M., Mallamaci, M., Maneva, G., Manganaro, M., Mannheim, K., Maraschi, L., Mariotti, M., MartÃnez, M., Mazin, D., Menchiari, S., Mender, S., MiÄanoviÄ, S., Miceli, D., Miener, T., Minev, M., Miranda, J. M., Mirzoyan, R., Molina, E., Moralejo, A., Morcuende, D., Moreno, V., Moretti, E., Neustroev, V., Nigro, C., Nilsson, K., Nishijima, K., Noda, K., Nozaki, S., Ohtani, Y., Oka, T., Otero-Santos, J., Paiano, S., Palatiello, M., Paneque, D., Paoletti, R., Paredes, J. M., PavletiÄ, L., Penil, P., Perennes, C., Persic, M., Moroni, P. G. P., Prandini, E., Priyadarshi, C., Puljak, I., Rhode, W., RibÃ³, M., Rico, J., Righi, C., Rugliancich, A., Saha, L., Sahakyan, N., Saito, T., Sakurai, S., Satalecka, K., Saturni, F. G., Schleicher, B., Schmidt, K., Schweizer, T., Sitarek, J., Å nidariÄ, I., Sobczynska, D., Spolon, A., Stamerra, A., Strom, D., Strzys, M., Suda, Y., SuriÄ, T., Takahashi, M., Tavecchio, F., Temnikov, P., TerziÄ, T., Teshima, M., Tosti, L., Truzzi, S., Tutone, A., Ubach, S., Van Scherpenberg, J., Vanzo, G., Vazquez Acosta, M., Ventura, S., Verguilov, V., Vigorito, C. F., Vitale, V., Vovk, I., Will, M., Wunderlich, C., ZariÄ, D., Adams, C. B., Benbow, W., Brill, A., Capasso, M., Christiansen, J. L., Chromey, A. J., Daniel, M. K., Errando, M., Farrell, K. A., Feng, Q., Finley, J. P., Fortson, L., Furniss, A., Gent, A., Giuri, C., Hassan, T., Hervet, O., Holder, J., Hughes, G., Humensky, T. B., Jin, W., Kaaret, P., Kertzman, M., Kieda, D., Kumar, S., Lang, M. J., Lundy, M., Maier, G., Moriarty, P., Mukherjee, R., Nieto, D., Nievas-Rosillo, M., O’Brien, S., Ong, R. A., Otte, A. N., Patel, S., Pfrang, K., Pohl, M., Prado, R. R., Pueschel, E., Quinn, J., Ragan, K., Reynolds, P. T., Ribeiro, D., Richards, G. T., Roache, E., Rulten, C., Ryan, J. L., Santander, M., Sembroski, G. H., Shang, R., Weinstein, A., Williams, D. A., Williamson, T. J., Hirota, T., Cui, L., Niinuma, K., Ro, H., Sakai, N., Sawada-Satoh, S., Wajima, K., Wang, N., Liu, X., Yonekura, Y., Algaba, J. C., Anczarski, J., Asada, K., BalokoviÄ, M., Chandra, S., Cui, Y. -Z, Falcone, A. D., Giroletti, M., Goddi, C., Hada, K., Haggard, D., Jorstad, S., Kaur, A., Kawashima, T., Keating, G., Kim, J. -Y, Kino, M., Komossa, S., Kravchenko, E. V., Krichbaum, T. P., Lee, S. -S, Lu, R. -S, Lucchini, M., Markoff, S., Neilsen, J., Nowak, M. A., Park, J., Principe, G., Ramakrishnan, V., Reynolds, M. T., Sasada, M., Savchenko, S. S., Williamson, K. E., Akiyama, K., Alberdi, A., Alef, W., Anantua, R., Azulay, R., Baczko, A. -K, Ball, D., Barrett, J., Bintley, D., Benson, B. A., Blackburn, L., Blundell, R., Boland, W., Bouman, K. L., Bower, G. C., Boyce, H., Bremer, M., Brinkerink, C. D., Brissenden, R., Britzen, S., Broderick, A. E., Broguiere, D., Bronzwaer, T., Byun, D. -Y, Carlstrom, J. E., Chael, A., Chan, C. -K, Chatterjee, S., Chatterjee, K., Chen, M. -T, Chen, Y., Chesler, P. M., Cho, I., Christian, P., Conway, J. E., Cordes, J. M., Crawford, T. M., Crew, G. B., Cruz-Osorio, A., Davelaar, J., De Laurentis, M., Deane, R., Dempsey, J., Desvignes, G., Dexter, J., Doeleman, S. S., Eatough, R. P., Falcke, H., Farah, J., Fish, V. L., Fomalont, E., Ford, H. A., Fraga-Encinas, R., Friberg, P., Fromm, C. M., Fuentes, A., Galison, P., Gammie, C. F., GarcÃa, R., Gentaz, O., Georgiev, B., Gold, R., GÃ³mez, J. L., GÃ³mez-Ruiz, A. I., Gu, M., Gurwell, M., Hecht, M. H., Hesper, R., Ho, L. C., Ho, P., Honma, M., Huang, C. -WL., Huang, L., Hughes, D. H., Ikeda, S., Inoue, M., Issaoun, S., James, D. J., Jannuzi, B. T., Janssen, M., Jeter, B., Jiang, W., JimÃ©nez-Rosales, A., Johnson, M. D., Jung, T., Karami, M., Karuppusamy, R., Kettenis, M., Kim, D. -J, Kim, J., Koay, J. Y., Kofuji, Y., Koch, P. M., Koyama, S., Kramer, M., Kramer, C., Kuo, C. -Y, Lauer, T. R., Levis, A., Li, Y. -R, Li, Z., Lindqvist, M., Lico, R., Lindahl, G., Liu, J., Liu, K., Liuzzo, E., Lo, W. -P, Lobanov, A. P., Loinard, L., Lonsdale, C., Macdonald, N. R., Mao, J., Marchili, N., Marrone, D. P., Marscher, A. P., MartÃ-Vidal, I., Matsushita, S., Matthews, L. D., Medeiros, L., Menten, K. M., Mizuno, I., Mizuno, Y., Moran, J. M., Moriyama, K., Moscibrodzka, M., MÃŒller, C., Musoke, G., MejÃas, A. M., Nagai, H., Nagar, N. M., Nakamura, M., Narayan, R., Narayanan, G., Natarajan, I., Nathanail, A., Neri, R., Ni, C., Noutsos, A., Okino, H., Olivares, H., Ortiz-LeÃ³n, G. N., Oyama, T., Ozel, F., Palumbo, D. C. M., Patel, N., Pen, U. -L, Pesce, D. W., PiÃ©tu, V., Plambeck, R., Popstefanija, A., Porth, O., PÃ¶tzl, F. M., Prather, B., Preciado-LÃ³pez, J. A., Psaltis, D., Pu, H. -Y, Rao, R., Rawlings, M. G., Raymond, A. W., Rezzolla, L., Ricarte, A., Ripperda, B., Roelofs, F., Rogers, A., Ros, E., Rose, M., Roshanineshat, A., Rottmann, H., Roy, A. L., Ruszczyk, C., Rygl, K. L. J., SÃ¡nchez, S., SÃ¡nchez-Arguelles, D., Savolainen, T., Schloerb, F. P., Schuster, K. -F, Shao, L., Shen, Z., Small, D., Sohn, B. W., Soohoo, J., Sun, H., Tazaki, F., Tetarenko, A. J., Tiede, P., Tilanus, R. P. J., Titus, M., Toma, K., Torne, P., Trent, T., Traianou, E., Trippe, S., Van Bemmel, I., Van Langevelde, H. J., Van Rossum, D. R., Wagner, J., Ward-Thompson, D., Wardle, J., Weintroub, J., Wex, N., Wharton, R., Wielgus, M., Wong, G. N., Wu, Q., Yoon, D., Young, A., Young, K., Younsi, Z., Yuan, F., Yuan, Y. -F, Zensus, J. A., Zhao, G. -Y, Zhao, S. -S, D’Ammando, F., Orienti, M., Abdalla, H., Adam, R., Aharonian, F., Benkhali, F. A., AngÃŒner, E. O., Arcaro, C., Armand, C., Armstrong, T., Ashkar, H., Backes, M., Baghmanyan, V., Barbosa Martins, V., Barnacka, A., Barnard, M., Becherini, Yvonne, Berge, D., BernlÃ¶hr, K., Bi, B., BÃ¶ttcher, M., Boisson, C., Bolmont, J., De Bony De Lavergne, M., Breuhaus, M., Brun, F., Brun, P., Bryan, M., BÃŒchele, M., Bulik, T., Bylund, Tomas, Caroff, S., Carosi, A., Casanova, S., Chand, T., Chen, A., Cotter, G., CuryÅo, M., Damascene Mbarubucyeye, J., Davids, I. D., Davies, J., Deil, C., Devin, J., Dewilt, P., Dirson, L., Djannati-AtaÃ¯, A., Dmytriiev, A., Donath, A., Doroshenko, V., Duffy, C., Dyks, J., Egberts, K., Eichhorn, F., Einecke, S., Emery, G., Ernenwein, J. -P, Feijen, K., Fegan, S., Fiasson, A., De Clairfontaine, G. F., Fontaine, G., Funk, S., FÃŒÃling, M., Gabici, S., Gallant, Y. A., Giavitto, G., Giunti, L., Glawion, D., Glicenstein, J. F., Gottschall, D., Grondin, M. -H, Hahn, J., Haupt, M., Hermann, G., Hinton, J. A., Hofmann, W., Hoischen, C., Holch, T. L., Holler, M., HÃ¶rbe, M., Horns, D., Huber, D., Jamrozy, M., Jankowsky, D., Jankowsky, F., Jardin-Blicq, A., Joshi, V., Jung-Richardt, I., Kasai, E., Kastendieck, M. A., KatarzyÅski, K., Katz, U., Khangulyan, D., KhÃ©lifi, B., Klepser, S., KluÅºniak, W., Komin, N., Konno, R., Kosack, K., Kostunin, D., Kreter, M., Lamanna, G., Lemiere, A., Lemoine-Goumard, M., Lenain, J. -P, Levy, C., Lohse, T., Lypova, I., Mackey, J., Majumdar, J., Malyshev, D., Marandon, V., Marchegiani, P., Marcowith, A., Mares, A., MartÃ-Devesa, G., Marx, R., Maurin, G., Meintjes, P. J., Meyer, M., Moderski, R., Mohamed, M., Mohrmann, L., Montanari, A., Moore, C., Morris, P., Moulin, E., Muller, J., Murach, T., Nakashima, K., Nayerhoda, A., De Naurois, M., Ndiyavala, H., Niederwanger, F., Niemiec, J., Oakes, L., O’Brien, P., Odaka, H., Ohm, S., Olivera-Nieto, L., De Ona Wilhelmi, E., Ostrowski, M., Panter, M., Panny, S., Parsons, R. D., Peron, G., Peyaud, B., Piel, Q., Pita, S., Poireau, V., Noel, A. P., Prokhorov, D. 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Abstract: In 2017, the Event Horizon Telescope (EHT) Collaboration succeeded in capturing the first direct image of the center of the M87 galaxy. The asymmetric ring morphology and size are consistent with theoretical expectations for a weakly accreting supermassive black hole of mass âŒ6.5 Ã 109 M oË. The EHTC also partnered with several international facilities in space and on the ground, to arrange an extensive, quasi-simultaneous multi-wavelength campaign. This Letter presents the results and analysis of this campaign, as well as the multi-wavelength data as a legacy data repository. We captured M87 in a historically low state, and the core flux dominates over HST-1 at high energies, making it possible to combine core flux constraints with the more spatially precise very long baseline interferometry data. We present the most complete simultaneous multi-wavelength spectrum of the active nucleus to date, and discuss the complexity and caveats of combining data from different spatial scales into one broadband spectrum. We apply two heuristic, isotropic leptonic single-zone models to provide insight into the basic source properties, but conclude that a structured jet is necessary to explain M87’s spectrum. We can exclude that the simultaneous Î³-ray emission is produced via inverse Compton emission in the same region producing the EHT mm-band emission, and further conclude that the Î³-rays can only be produced in the inner jets (inward of HST-1) if there are strongly particle-dominated regions. Direct synchrotron emission from accelerated protons and secondaries cannot yet be excluded. Â© 2021. The Author(s). Published by the American Astronomical Society..
Published: 2021
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46. Elliptical Accretion Disk as a Model for Tidal Disruption Events

Author: Liu, F. K., primary, Cao, C. Y., additional, Abramowicz, M. A., additional, Wielgus, M., additional, Cao, R., additional, and Zhou, Z. Q., additional
Published: 2021
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47. Geometric modeling of M87* as a Kerr black hole or a non-Kerr compact object

Author: Vincent, F. H., primary, Wielgus, M., additional, Abramowicz, M. A., additional, Gourgoulhon, E., additional, Lasota, J.-P., additional, Paumard, T., additional, and Perrin, G., additional
Published: 2021
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48. Monitoring the Morphology of M87*in 2009-2017 with the Event Horizon Telescope

Author: Wielgus, M., Akiyama, Kazunori, Blackburn, L., Chan, Chi-kwan, Dexter, J., Doeleman, Sheperd S., Issaoun, Sara, Brinkerink, C.D., Bronzwaer, T.J.W., Davelaar, Jordy, Falcke, H.D.E., Goddi, C., Janssen, Michael, Mościbrodzka, M.A., Müller, C., Musoke, Gibwa, Natarajan, Iniyan, Olivares, H., Roelofs, Freek, Rossum, D.R. van, Tilanus, Remo P.J., Young, A., Zhao, S., Zhu, Ziyan, Wielgus, M., Akiyama, Kazunori, Blackburn, L., Chan, Chi-kwan, Dexter, J., Doeleman, Sheperd S., Issaoun, Sara, Brinkerink, C.D., Bronzwaer, T.J.W., Davelaar, Jordy, Falcke, H.D.E., Goddi, C., Janssen, Michael, Mościbrodzka, M.A., Müller, C., Musoke, Gibwa, Natarajan, Iniyan, Olivares, H., Roelofs, Freek, Rossum, D.R. van, Tilanus, Remo P.J., Young, A., Zhao, S., and Zhu, Ziyan
Abstract: Contains fulltext : 225237.pdf (publisher's version ) (Open Access)
Published: 2020

49. SYMBA: An end-to-end VLBI synthetic data generation pipeline

Author: Roelofs, F., primary, Janssen, M., additional, Natarajan, I., additional, Deane, R., additional, Davelaar, J., additional, Olivares, H., additional, Porth, O., additional, Paine, S. N., additional, Bouman, K. L., additional, Tilanus, R. P. J., additional, van Bemmel, I. M., additional, Falcke, H., additional, Akiyama, K., additional, Alberdi, A., additional, Alef, W., additional, Asada, K., additional, Azulay, R., additional, Baczko, A., additional, Ball, D., additional, Baloković, M., additional, Barrett, J., additional, Bintley, D., additional, Blackburn, L., additional, Boland, W., additional, Bower, G. C., additional, Bremer, M., additional, Brinkerink, C. D., additional, Brissenden, R., additional, Britzen, S., additional, Broderick, A. E., additional, Broguiere, D., additional, Bronzwaer, T., additional, Byun, D., additional, Carlstrom, J. E., additional, Chael, A., additional, Chan, C., additional, Chatterjee, S., additional, Chatterjee, K., additional, Chen, M., additional, Chen, Y., additional, Cho, I., additional, Christian, P., additional, Conway, J. E., additional, Cordes, J. M., additional, Crew, G. B., additional, Cui, Y., additional, De Laurentis, M., additional, Dempsey, J., additional, Desvignes, G., additional, Dexter, J., additional, Doeleman, S. S., additional, Eatough, R. P., additional, Fish, V. L., additional, Fomalont, E., additional, Fraga-Encinas, R., additional, Friberg, P., additional, Fromm, C. M., additional, Gómez, J. L., additional, Galison, P., additional, Gammie, C. F., additional, García, R., additional, Gentaz, O., additional, Georgiev, B., additional, Goddi, C., additional, Gold, R., additional, Gu, M., additional, Gurwell, M., additional, Hada, K., additional, Hecht, M. H., additional, Hesper, R., additional, Ho, L. C., additional, Ho, P., additional, Honma, M., additional, Huang, C. L., additional, Huang, L., additional, Hughes, D. H., additional, Ikeda, S., additional, Inoue, M., additional, Issaoun, S., additional, James, D. J., additional, Jannuzi, B. T., additional, Jeter, B., additional, Jiang, W., additional, Johnson, M. D., additional, Jorstad, S., additional, Jung, T., additional, Karami, M., additional, Karuppusamy, R., additional, Kawashima, T., additional, Keating, G. K., additional, Kettenis, M., additional, Kim, J., additional, Kino, M., additional, Koay, J. Y., additional, Koch, P. M., additional, Koyama, S., additional, Kramer, M., additional, Kramer, C., additional, Krichbaum, T. P., additional, Kuo, C., additional, Lauer, T. R., additional, Lee, S., additional, Li, Y., additional, Li, Z., additional, Lindqvist, M., additional, Lico, R., additional, Liu, K., additional, Liuzzo, E., additional, Lo, W., additional, Lobanov, A. P., additional, Loinard, L., additional, Lonsdale, C., additional, Lu, R., additional, MacDonald, N. R., additional, Mao, J., additional, Markoff, S., additional, Marrone, D. P., additional, Marscher, A. P., additional, Martí-Vidal, I., additional, Matsushita, S., additional, Matthews, L. D., additional, Medeiros, L., additional, Menten, K. M., additional, Mizuno, Y., additional, Mizuno, I., additional, Moran, J. M., additional, Moriyama, K., additional, Moscibrodzka, M., additional, Müller, C., additional, Nagai, H., additional, Nagar, N. M., additional, Nakamura, M., additional, Narayan, R., additional, Narayanan, G., additional, Neri, R., additional, Ni, C., additional, Noutsos, A., additional, Okino, H., additional, Ortiz-León, G. N., additional, Oyama, T., additional, Özel, F., additional, Palumbo, D. C. M., additional, Patel, N., additional, Pen, U., additional, Pesce, D. W., additional, Piétu, V., additional, Plambeck, R., additional, PopStefanija, A., additional, Prather, B., additional, Preciado-López, J. A., additional, Psaltis, D., additional, Pu, H., additional, Ramakrishnan, V., additional, Rao, R., additional, Rawlings, M. G., additional, Raymond, A. W., additional, Rezzolla, L., additional, Ripperda, B., additional, Rogers, A., additional, Ros, E., additional, Rose, M., additional, Roshanineshat, A., additional, Rottmann, H., additional, Roy, A. L., additional, Ruszczyk, C., additional, Ryan, B. R., additional, Rygl, K. L. J., additional, Sánchez, S., additional, Sánchez-Arguelles, D., additional, Sasada, M., additional, Savolainen, T., additional, Schloerb, F. P., additional, Schuster, K., additional, Shao, L., additional, Shen, Z., additional, Small, D., additional, Won Sohn, B., additional, SooHoo, J., additional, Tazaki, F., additional, Tiede, P., additional, Titus, M., additional, Toma, K., additional, Torne, P., additional, Traianou, E., additional, Trent, T., additional, Trippe, S., additional, Tsuda, S., additional, van Langevelde, H. J., additional, van Rossum, D. R., additional, Wagner, J., additional, Wardle, J., additional, Weintroub, J., additional, Wex, N., additional, Wharton, R., additional, Wielgus, M., additional, Wong, G. N., additional, Wu, Q., additional, Young, A., additional, Young, K., additional, Younsi, Z., additional, Yuan, F., additional, Yuan, Y., additional, Zensus, J. A., additional, Zhao, G., additional, Zhao, S., additional, and Zhu, Z., additional
Published: 2020
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50. Studying Black Holes on Horizon Scales with VLBI Ground Arrays

Author: Blackburn, L., Doeleman, S., Dexter, J., Gomez, J.L., Johnson, M.D., Palumbo, D.C., Weintroub, J., Farah, J.R., Fish, V., Loinard, L., Lonsdale, C., Narayanan, G., Patel, N.A., Pesce, D.W., Raymond, A., Tilanus, R.P.J., Wielgus, M., Akiyama, K., Bower, G., Broderick, A., Deane, R., Fromm, C., Gammie, C., Gold, R., Janssen, M., Kawashima, T., Krichbaum, T., Marrone, D.P., Matthews, L.D., Mizuno, Y., Rezzolla, L., Roelofs, F., Ros, E., Savolainen, T.K., Yuan, F., and Zhao, G.
Published: 2019

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