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2. The CompactLight Design Study

Author

D’Auria, G., Adli, E., Aicheler, M., Aksoy, A., Alesini, D., Apsimon, R., Arnsberg, J., Auchettl, R., Bainbridge, A., Balazs, K., Bantekas, D., Bedolla, J., Behtouei, M., Bellaveglia, M., vd Berg, M., Bernhard, A., Bignami, A., Breitenbach, M., Breukers, M., Burt, G., Cai, J., Calvi, M., Cardelli, F., Carpanese, M., Cortes, H. M. Castaneda, Castilla, A., Cianchi, A., Clarke, J., Cowie, L., Croia, M., Cross, A., Danailov, M., Dattoli, G., Deleval, S., Mitri, S. Di, Diomede, M., Dowd, R., Dunning, D., Easton, J., Fang, W., Fatehi, S., Faus-Golfe, A., Ferianis, M., Ferrario, M., Ficcadenti, L., Gallo, A., Gazis, E., Gazis, N., Geometrante, R., Gethmann, J., Gioppo, R., Giribono, A., González-Iglesias, D., Goryashko, V., Grohmann, S., Gu, Q., Han, Y., Hinton, A., Hobi, A., Hoekstra, R., Huang, X., Jacewicz, M., Jones, J., Kaertner, F., Karagiannaki, A., Kokole, M., Kotitsa, R., Kotsopoulos, D., Krasch, B., Latina, A., Lepercq, P., Liu, X., Lucas, T. G., Luiten, O. J., Maheshwari, M., Mahnic, J., Mak, A., Marcos, J., Marin, E., Marinov, K., Martínez, B. G., Mercier, B., Migliorati, M., Milharcic, T., Mostacci, A., Mu noz, R., Musat, V., Mutsaers, P. H. A., Nergiz, Z., Nguyen, F., Nix, L., Palumbo, L., Parodi, M., Pavlica, R., Pellegrino, L., Pereira, D. E., Perez, F., Petralia, A., Piersanti, L., Pockar, J., Pramatari, K., Priem, H., Primozic, U., Rassool, R., Reiche, S., Revilak, P., Richter, S. C., Rochow, R., Rossi, C., Salén, P., Schmidt, T., Schoerling, D., Schulte, D., Scifo, J., Sheehy, S., Shepherd, B., Spataro, B., Stapnes, S., Stragier, X. F. D., Syratchev, I., Tabacco, C., Tan, J., Tanke, E., Taylor, G., Telahi, I., Thompson, N., Trachanas, E., Tzanetou, K. S., Vaccarezza, C., Vainola, J., Vannozzi, A., Volpi, M., Wang, C., Williams, P., Wu, X., Wuensch, W., Yap, J., Zangrando, M., Zhang, K., Zhang, L., Zhao, Y., Zhao, Z., and Zhu, D.

Published
2024
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5. Correlation between structure and dynamics of CO$_2$ confined in Mg-MOF-74 and the role of inter-crystalline space: A molecular dynamics simulation study

Author

Dhiman, I., Berg, M. C., Cole, David R., and Gautam, Siddharth

Subjects
Physics - Chemical Physics
Abstract

Mg-MOF-74 is a metal-organic framework (MOF) that exhibits a high capacity for CO$_2$ adsorption. Given the importance of CO$_2$ confinement in Mg-MOF-74 for capture and storage applications, it is important to understand the structural and dynamical behavior of CO$_2$ in Mg-MOF-74 pores. While most molecular simulation studies use ideal single crystal models of nano-porous substrates, the existence of inter-crystalline space has been shown to have profound effects on the sorption, structure and dynamics of the adsorbed fluid. To address these issues, we report a molecular dynamics simulation study at 300 K, of CO$_2$ confined in several models of Mg-MOF-74 with systematically inserted inter-crystalline spacing of different widths. Both structural and dynamical behavior of CO$_2$ is studied in 5 models of Mg-MOF-74, each at 4 different loadings. Six strong sites of CO$_2$ adsorption are found at the periphery of the pores of Mg-MOF-74 in addition to a relatively weak adsorption at the center of the pore. On insertion of inter-crystalline spacing, additional six sites of strong adsorption are seen in the inter-crystalline space close to the pore opening. These additional sites delocalize as the inter-crystalline space is widened and the population of guest molecules adsorbed at the pore center grows at the expense of peripheral population. This redistribution of guest molecules has important implications for their dynamics. While in the model without inter-crystalline space, translation motion is found to be slower at higher loadings, as wider inter-crystalline space is introduced, anomalous loading dependence of translational diffusivity is observed. In general, inserting inter-crystalline spacing is found to enhance both translational as well as rotational motion of the guest molecules. The results reported here provide valuable insight to carbon capture and storage., Comment: 15 pages, 9 figures

Published
2022
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6. Clinical and self-reported markers of reproductive function in female survivors of childhood Hodgkin lymphoma

Author

Drechsel, K. C. E., Broer, S. L., Stoutjesdijk, F. S., Twisk, J. W. R., van den Berg, M. H., Lambalk, C. B., van Leeuwen, F. E., Overbeek, A., van den Heuvel-Eibrink, M. M., van Dorp, W., de Vries, A. C. H., Loonen, J. J., van der Pal, H. J., Kremer, L. C., Tissing, W. J., Versluys, B., Kaspers, G. J. L., van Dulmen-den Broeder, E., and Veening, M. A.

Published
2023
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7. Interplay of As (im)mobilisation processes in groundwater: Learning from hydrochemical investigations

Author

Stopelli, E., primary, Duyen, V.T., additional, Mai, T.T., additional, Trang, P.T.K., additional, Viet, P.H., additional, Lightfoot, A., additional, Kipfer, R., additional, Schneider, M., additional, Eiche, E., additional, Kontny, A., additional, Neumann, T., additional, Glodowska, M., additional, Patzner, M., additional, Kappler, A., additional, Kleindienst, S., additional, Rathi, B., additional, Cirpka, O., additional, Bostick, B.C., additional, Prommer, H., additional, Winkel, L.H.E., additional, and Berg, M., additional

Published
2024
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11. On efficiency and localisation for the torsion function

Author

Berg, M. van den, Bucur, D., and Kappeler, T.

Subjects
Mathematics - Analysis of PDEs, Mathematics - Spectral Theory
Abstract

We consider the torsion function for the Dirichlet Laplacian $-\Delta$, and for the Schr\"odinger operator $- \Delta + V$ on an open set $\Omega\subset \R^m$ of finite Lebesgue measure $0<|\Omega|<\infty$ with a real-valued, non-negative, measurable potential $V.$ We investigate the efficiency and the phenomenon of localisation for the torsion function, and their interplay with the geometry of the first Dirichlet eigenfunction., Comment: 33 pages. The published version in Potential Analysis (2022) 57, 571--600 has some typos: Theorem 3(i): the first exponent should read $(m-2)/m$; Example 2 Line 2: .... $B(p_{n+1};cn^{-\beta})$.....; Formula (109): $\kappa^{-1}$ missing after the second inequality

Published
2020

12. De patiënt met een intoxicatie

Author

van den Berg, M. J. W., Kramers, C., Lafeber, M., Vroegop, M. P., Tan, E.C.T.H., editor, Kaasjager, H.A.H., editor, Kooij, F.O., editor, Motz, C., editor, Verdonschot, R.J.C.G., editor, and Wulterkens, Th.W., editor

Published
2023
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13. The X-ray Emissivity of Low-Density Stellar Populations

Author

Heinke, C. O., Ivanov, M. G., Koch, E. W., Andrews, R., Chomiuk, L., Cohn, H. N., Crothers, S., de Boer, T., Ivanova, N., Kong, A. K. H., Leigh, N. W. C., Lugger, P. M., Nelson, L., Parr, C. J., Rosolowsky, E. W., Ruiter, A. J., Sarazin, C. L., Shaw, A. W., Sivakoff, G. R., and Berg, M. van den

Subjects
Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Astrophysics of Galaxies
Abstract

The dynamical production of low-mass X-ray binaries and brighter cataclysmic variables (CVs) in dense globular clusters is well-established. We investigate how the X-ray emissivity of fainter X-ray binaries (principally CVs and coronally active binaries) varies between different environments. We compile calculations (largely from the literature) of the X-ray emissivity of old stellar populations, including open and globular clusters and several galaxies. We investigate three literature claims of unusual X-ray sources in low-density stellar populations. We show that a suggested quiescent neutron star in the open cluster NGC 6819 is a foreground M dwarf. We show that the suggested diffuse X-ray emission from an old nova shell in the globular cluster NGC 6366 is actually a background galaxy cluster. And we show that a suggested population of quiescent X-ray binaries in the Sculptor Dwarf Galaxy is mostly (perhaps entirely) background galaxies. We find that above densities of $10^4$ M$_{\odot}$/pc$^3$, the X-ray emissivity of globular clusters increases, due to dynamical production of X-ray emitting systems. Below this density, globular clusters have lower X-ray emissivity than the other populations, and we do not see a strong dependence of X-ray emissivity due to density effects. We find significant correlations between X-ray emissivity and binary fraction, metallicity, and density. Sampling these fits via bootstrap techniques gives less significant correlations, but confirms the effect of metallicity on low-density populations, and that of density on the full globular cluster sample., Comment: 28 pages, 23 figures. MNRAS, in press

Published
2020
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14. Think Global, Act Local: The Influence of Environment Age and Host Mass on Type Ia Supernova Light Curves

Author

Rose, B. M., Garnavich, P. M., and Berg, M. A.

Subjects
Astrophysics - Cosmology and Nongalactic Astrophysics, Astrophysics - Astrophysics of Galaxies
Abstract

The reliability of Type Ia supernovae (SNIa) may be limited by the imprint of their galactic origins. To investigate the connection between supernovae and their host characteristics, we developed an improved method to estimate the stellar population age of the host as well as the local environment around the site of the supernova. We use a Bayesian method to estimate the star formation history and mass weighted age of a supernova's environment by matching observed spectral energy distributions to a synthesized stellar population. Applying this age estimator to both the photometrically and spectroscopically classified Sloan Digital Sky Survey II supernovae (N=103) we find a $0.114 \pm 0.039~{\rm mag}$ `step' in the average Hubble residual at a stellar age of $\sim 8~\text{Gyr}$; it is nearly twice the size of the currently popular mass step. We then apply a principal component analysis on the SALT2 parameters, host stellar mass, and local environment age. We find that a new parameter, PC$_1$, consisting of a linear combination of stretch, host stellar mass, and local age, shows a very significant ($4.7\sigma$) correlation with Hubble residuals. There is a much broader range of PC$_1$ values found in the Hubble flow sample when compared with the Cepheid calibration galaxies. These samples have mildly statistically different average PC$_1$ values, at $\sim 2.5\sigma$, resulting in at most a 1.3% reduction in the evaluation of H$_0$. Despite accounting for the highly significant trend in SNIa Hubble residuals, there remains a 9% discrepancy between the most recent precision estimates of H$_0$ using SNIa and the CMB., Comment: 23 pages, 17 figures, 11 tables, accepted to ApJ

Published
2019
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20. On a P\'olya functional for rhombi, isosceles triangles, and thinning convex sets

Author

Berg, M. van den, Ferone, V., Nitsch, C., and Trombetti, C.

Subjects
Mathematics - Analysis of PDEs, Mathematics - Optimization and Control, 49J45, 49R05, 35P15, 47A75, 35J25
Abstract

Let $\Omega$ be an open convex set in ${\mathbb R}^m$ with finite width, and let $v_{\Omega}$ be the torsion function for $\Omega$, i.e. the solution of $-\Delta v=1, v\in H_0^1(\Omega)$. An upper bound is obtained for the product of $\Vert v_{\Omega}\Vert_{L^{\infty}(\Omega)}\lambda(\Omega)$, where $\lambda(\Omega)$ is the bottom of the spectrum of the Dirichlet Laplacian acting in $L^2(\Omega)$. The upper bound is sharp in the limit of a thinning sequence of convex sets. For planar rhombi and isosceles triangles with area $1$, it is shown that $\Vert v_{\Omega}\Vert_{L^{1}(\Omega)}\lambda(\Omega)\ge \frac{\pi^2}{24}$, and that this bound is sharp., Comment: 12 pages, 4 figures

Published
2018

21. Quantifying the AGN-driven outflows in ULIRGs (QUADROS) II: evidence for compact outflow regions from HST [OIII] imaging observations

Author

Tadhunter, C., Zaurín, J. Rodríguez, Rose, M., Spence, R. A. W., Batcheldor, D., Berg, M. A., Almeida, C. Ramos, Spoon, H., Sparks, W., and Chiaberge, M.

Subjects
Astrophysics - Astrophysics of Galaxies
Abstract

The true importance of the warm, AGN-driven outflows for the evolution of galaxies remains uncertain. Measurements of the radial extents of the outflows are key for quantifying their masses and kinetic powers, and also establishing whether the AGN outflows are galaxy-wide. Therefore, as part of a larger project to investigate the significance of warm, AGN-driven outflows in the most rapidly evolving galaxies in the local universe, here we present deep Hubble Space Telescope ( HST) narrow-band [OIII]$\lambda$5007 observations of a complete sample of 8 nearby ULIRGs with optical AGN nuclei. Combined with the complementary information provided by our ground-based spectroscopy, the HST images show that the warm gas outflows are relatively compact for most of the objects in the sample: in three objects the outflow regions are barely resolved at the resolution of HST ($0.065 < R_{[OIII]} < 0.12$ kpc); in a further four cases the outflows are spatially resolved but with flux weighted mean radii in the range $0.65 < R_{[OIII]} < 1.2$ kpc; and in only one object (Mrk273) is there clear evidence for a more extended outflow, with a maximum extent of $R_{[OIII]}\sim5$ kpc. Overall, our observations show little evidence for the galaxy-wide outflows predicted by some models of AGN feedback., Comment: 14 pages, 3 figures, accepted for publication in MNRAS

Published
2018
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22. HST spectrum and timing of the ultra-compact X-ray binary candidate 47 Tuc X9

Author

Tudor, V., Miller-Jones, J. C. A., Knigge, C., Maccarone, T. J., Tauris, T. M., Bahramian, A., Chomiuk, L., Heinke, C. O., Sivakoff, G. R., Strader, J., Plotkin, R. M., Soria, R., Albrow, M. D., Anderson, G. E., Berg, M. van den, Bernardini, F., Bogdanov, S., Britt, C. T., Russell, D. M., and Zurek, D. R.

Subjects
Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Solar and Stellar Astrophysics
Abstract

To confirm the nature of the donor star in the ultra-compact X-ray binary candidate 47 Tuc X9, we obtained optical spectra (3,000$-$10,000 {\AA}) with the Hubble Space Telescope / Space Telescope Imaging Spectrograph. We find no strong emission or absorption features in the spectrum of X9. In particular, we place $3\sigma$ upper limits on the H$\alpha$ and HeII $\lambda 4686$ emission line equivalent widths $-$EW$_{\mathrm{H\alpha}} \lesssim 14$ {\AA} and $-$EW$_{\mathrm{HeII}} \lesssim 9$ {\AA}, respectively. This is much lower than seen for typical X-ray binaries at a similar X-ray luminosity (which, for $L_{\mathrm{2-10 keV}} \approx 10^{33}-10^{34}$ erg s$^{-1}$ is typically $-$EW$_{\mathrm{H\alpha}} \sim 50$ {\AA}). This supports our previous suggestion (by Bahramian et al.) of an H-poor donor in X9. We perform timing analysis on archival far-ultraviolet, $V$ and $I$-band data to search for periodicities. In the optical bands we recover the seven-day superorbital period initially discovered in X-rays, but we do not recover the orbital period. In the far-ultraviolet we find evidence for a 27.2 min period (shorter than the 28.2 min period seen in X-rays). We find that either a neutron star or black hole could explain the observed properties of X9. We also perform binary evolution calculations, showing that the formation of an initial black hole / He-star binary early in the life of a globular cluster could evolve into a present-day system such as X9 (should the compact object in this system indeed be a black hole) via mass-transfer driven by gravitational wave radiation., Comment: 20 pages, 12 figures. Accepted for publication in MNRAS

Published
2018
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23. A Targeted Analysis of Serial Cytokine Measures and Nonpulmonary Organ System Failure in Children With Acute Respiratory Failure: Individual Measures and Trajectories Over Time

Author

Ardila, Silvia M., Weeks, Heidi M., Dahmer, Mary K., Kaciroti, Niko, Quasney, Michael, Sapru, Anil, Curley, Martha A. Q., Flori, Heidi R., Bateman, Scot T., Berg, M. D., Borasino, Santiago, Bysani, G. Kris, Cowl, Allison S., Bowens, Cindy Darnell, Vincent, E., Faustino, S., Fineman, Lori D., Godshall, A. J., Hirshberg, Ellie, Kirby, Aileen L., McLaughlin, Gwenn E., Medar, Shivanand, Oren, Phineas P., Schneider, James B., Schwarz, Adam J., Shanley, Thomas P., Source, Lauren R., Truemper, Edward J., Vander Heyden, Michele A., Wittmayer, Kim, Zuppa, Athena, and Wypij, David

Published
2023
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26. Hepatitis C Elimination in the Netherlands (CELINE): How nationwide retrieval of lost to follow-up hepatitis C patients contributes to micro-elimination

Author

van den Berg, M., Honkoop, P., Abraham, S., Bosman, S., van Wijngaarden, P., Steenhuisen, K., Friederich, P., Dofferhoff, A.S. M., Berkhout, J., ter Borg, F., da Silva, J.M., Verhagen, M.A.M.T., Vos, X., Vlaar, K., Douma, R., Erkelen, W.G., den Reijer, M., Hoebe, C.J.P.A., Heil, J., Baven, M., van Soest, H., Korkmaz, K. Sebib, Bezemer, G., Lammers, A.J.J., Debast, S.B., de Jong, H.J.M., Bus, P., Sturm, P., den Hollander, J., Kampschreur, L.M., Venneman, N., Bosma, F., Koc, O.M., Ackens, R., van Oorschot, E., Klemt-Kropp, M., Baak, L.C., Brouwer, J.T., Spanier, B.W.M., Swanink, C., Blokzijl, H., Knoester, M., Liedorp, P., van Bergeijk, J., van Nunen, A., Isfordink, Cas J., van Dijk, Marleen, Brakenhoff, Sylvia M., Kracht, Patricia A.M., Arends, Joop E., de Knegt, Robert J., van der Valk, Marc, and Drenth, Joost P.H.

Published
2022
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27. Torsional rigidity for cylinders with a Brownian fracture

Author

Berg, M. van den and Hollander, F. den

Subjects
Mathematics - Probability, Mathematics - Analysis of PDEs, 35J20, 60G50
Abstract

We obtain bounds for the expected loss of torsional rigidity of a cylinder $\Omega_L=(-L/2,L/2) \times \Omega\subset \R^3$ of length $L$ due to a Brownian fracture that starts at a random point in $\Omega_L,$ and runs until the first time it exits $\Omega_L$. These bounds are expressed in terms of the geometry of the cross-section $\Omega \subset \R^2$. It is shown that if $\Omega$ is a disc with radius $R$, then in the limit as $L \rightarrow \infty$ the expected loss of torsional rigidity equals $cR^5$ for some $c\in (0,\infty)$. We derive bounds for $c$ in terms of the expected Newtonian capacity of the trace of a Brownian path that starts at the centre of a ball in $\R^3$ with radius $1,$ and runs until the first time it exits this ball., Comment: 18 pages

Published
2017

28. Long-term observations of pulsars in the globular clusters 47 Tucanae and M15

Author

Ridolfi, A., Freire, P. C. C., Kramer, M., Bassa, C. G., Camilo, F., D'Amico, N., Desvignes, G., Heinke, C. O., Jordan, C., Lorimer, D. R., Lyne, A., Manchester, R. N., Pan, Z., Sarkissian, J., Torne, P., Berg, M. van den, Venkataraman, A., and Wex, N.

Subjects
Astrophysics - High Energy Astrophysical Phenomena
Abstract

Multi-decade observing campaigns of the globular clusters 47 Tucanae and M15 have led to an outstanding number of discoveries. Here, we report on the latest results of the long-term observations of the pulsars in these two clusters. For most of the pulsars in 47 Tucanae we have measured, among other things, their higher-order spin period derivatives, which have in turn provided stringent constraints on the physical parameters of the cluster, such as its distance and gravitational potential. For M15, we have studied the relativistic spin precession effect in PSR B2127+11C. We have used full-Stokes observations to model the precession effect, and to constrain the system geometry. We find that the visible beam of the pulsar is swiftly moving away from our line of sight and may very soon become undetectable. On the other hand, we expect to see the opposite emission beam sometime between 2041 and 2053., Comment: 4 pages, 1 figure, accepted for publication in the proceedings of IAU Symposium 337 - Pulsar Astrophysics: The Next Fifty Years

Published
2017
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29. Mid-UV Studies of the Transitional Millisecond Pulsars XSS J12270-4859 and PSR J1023+0038 During Their Radio Pulsar States

Author

Sandoval, L. E. Rivera, Santisteban, J. V. Hernandez, Degenaar, N., Wijnands, R., Knigge, C., Miller, J. M., Reynolds, M., Altamirano, D., Berg, M. van den, and Hill, A.

Subjects
Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Solar and Stellar Astrophysics
Abstract

We report mid-UV (MUV) observations taken with HST/WFC3, Swift/UVOT and GALEX/NUV of the transitional millisecond pulsars XSS J12270-4859 and PSR J1023+0038 during their radio pulsar states. Both systems were detected in our images and showed MUV variability. At similar orbital phases, the MUV luminosities of both pulsars are comparable. This suggests that the emission processes involved in both objects are similar. We estimated limits on the mass ratio, companion's temperature, inclination, and distance to XSS J12270-4859 by using a Markov Chain Monte Carlo algorithm to fit published folded optical light curves. Using the resulting parameters, we modeled MUV light curves in our HST filters. The resulting models failed to fit our MUV observations. Fixing the mass ratio of XSS J12270-4859 to the value reported in other studies, we obtained a distance of ~3.2 kpc. This is larger than the one derived from radio measurements (~1.4 kpc). Assuming a uniform prior for the mass ratio, the distance is similar to that from radio measurements. However, it requires an undermassive companion (~0.01 M_sun). We conclude that a direct heating model alone can not fully explain the observations in optical and MUV. Therefore, an additional radiation source is needed. The source could be an intrabinary shock which contributes to the MUV flux and likely to the optical one as well. During the radio pulsar state, the MUV orbital variations of PSR J1023+0038 detected with GALEX, suggests the presence of an asymmetric intrabinary shock., Comment: Accepted for publication in MNRAS. 16 pages, 10 figures, 2 tables. Minor changes with respect to previous arXiv version

Published
2017
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30. New Cataclysmic Variables and other Exotic Binaries in the Globular Cluster 47 Tucanae

Author

Sandoval, L. E. Rivera, Berg, M. van den, Heinke, C. O., Cohn, H. N., Lugger, P. M., Anderson, J., Cool, A. M., Edmonds, P. D., Wijnands, R., Ivanova, N., and Grindlay, J. E.

Subjects
Astrophysics - Solar and Stellar Astrophysics, Astrophysics - Astrophysics of Galaxies, Astrophysics - High Energy Astrophysical Phenomena
Abstract

We present 22 new (+3 confirmed) cataclysmic variables (CVs) in the non core-collapsed globular cluster 47 Tucanae (47 Tuc). The total number of CVs in the cluster is now 43, the largest sample in any globular cluster so far. For the identifications we used near-ultraviolet (NUV) and optical images from the Hubble Space Telescope, in combination with X-ray results from the Chandra X-ray Observatory. This allowed us to build the deepest NUV CV luminosity function of the cluster to date. We found that the CVs in 47 Tuc are more concentrated towards the cluster center than the main sequence turnoff stars. We compared our results to the CV populations of the core-collapsed globular clusters NGC 6397 and NGC 6752. We found that 47 Tuc has fewer bright CVs per unit mass than those two other clusters. That suggests that dynamical interactions in core-collapsed clusters play a major role creating new CVs. In 47 Tuc, the CV population is probably dominated by primordial and old dynamically formed systems. We estimated that the CVs in 47 Tuc have total masses of approx. 1.4 M_sun. We also found that the X-ray luminosity function of the CVs in the three clusters is bimodal. Additionally, we discuss a possible double degenerate system and an intriguing/unclassified object. Finally, we present four systems that could be millisecond pulsar companions given their X-ray and NUV/optical colors. For one of them we present very strong evidence for being an ablated companion. The other three could be CO- or He-WDs., Comment: Published on MNRAS. 31 Pages, 23 Figures, 5 Tables. Minor changes with respect to previous arXiv version

Published
2017
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31. Development of a Blueprint for Integrated Care for Vulnerable Pregnant Women

Author

Harmsen van der Vliet-Torij, H. W., Venekamp, A. A., van Heijningen-Tousain, H. J. M., Wingelaar-Loomans, E., Scheele, J., de Graaf, J. P., and Lambregtse-van den Berg, M. P.

Subjects
High risk pregnancy -- Care and treatment, Health care teams -- Models -- Usage, Socially handicapped -- Health aspects, Pregnant women -- Care and treatment, Health care industry
Abstract

Purpose There has been increasing awareness of perinatal health and organisation of maternal and child health care in the Netherlands as a result of poor perinatal outcomes. Vulnerable women have a higher risk of these poor perinatal outcomes and also have a higher chance of receiving less adequate care. Therefore, within a consortium, embracing 100 organisations among professionals, educators, researchers, and policymakers, a joint aim was defined to support maternal and child health care professionals and social care professionals in providing adequate, integrated care for vulnerable pregnant women. Description Within the consortium, vulnerability is defined as the presence of psychopathology, psychosocial problems, and/or substance use, combined with a lack of individual and/or social resources. Three studies focussing on population characteristics, organisation of care and knowledge, skills, and attitudes of professionals regarding vulnerable pregnant women, were carried out. Outcomes were discussed in three field consultations. Assessment The outcomes of the studies, followed by the field consultations, resulted in a blueprint that was subsequently adapted to local operational care pathways in seven obstetric collaborations (organisational structures that consist of obstetricians of a single hospital and collaborating midwifery practices) and their collaborative partners. We conducted 12 interviews to evaluate the adaptation of the blueprint to local operational care pathways and its' embedding into the obstetric collaborations. Conclusion Practice-based research resulted in a blueprint tailored to the needs of maternal and child health care professionals and social care professionals and providing structure and uniformity to integrated care provision for vulnerable pregnant women., Author(s): H. W. Harmsen van der Vliet-Torij [sup.1] , A. A. Venekamp [sup.1] , H. J. M. van Heijningen-Tousain [sup.1] , E. Wingelaar-Loomans [sup.1] , J. Scheele [sup.1] , J. [...]

Published
2022
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32. Treatment Outcome Trends for Non-Ruptured Abdominal Aortic Aneurysms: A Nationwide Prospective Cohort Study

Author

van den Akker, P.J., Akkersdijk, G.P., Akkersdijk, W.L., van Andringa de Kempenaer, M.G., Arts, C.H.P., Avontuur, A.M., Bakker, O.J., Balm, R., Barendregt, W.B., Bekken, J.A., Bender, M.H.M., Bendermacher, B.L.W., van den Berg, M., Beuk, R.J., Blankensteijn, J.D., Bode, A.S., Bodegom, M.E., van der Bogt, K.E.A., Boll, A.P.M., Booster, M.H., Borger van der Burg, B.L.S., de Borst, G.J., Bos-van Rossum, W.T.G.J., Bosma, J., Botman, J.M.J., Bouwman, L.H., Brehm, V., de Bruijn, M.T., de Bruin, J.L., Brummel, P., van Brussel, J.P., Buijk, S.E., Buimer, M.G., Buscher, H.C.J.L., Cancrinus, E., Castenmiller, P.H., Cazander, G., Cuypers, P.h.W.M., Daemen, J.H.C., Dawson, I., Dierikx, J.E., Dijkstra, M.L., Diks, J., Dinkelman, M.K., Dirven, M., Dolmans, D.E.J.G.J., van Dortmont, L.M.C., Drouven, J.W., van der Eb, M.M., Eefting, D., van Eijck, G.J.W.M., Elshof, J.W.M., Elsman, B.H.P., van der Elst, A., van Engeland, M.I.A., van Eps, G.S., Faber, M.J., de Fijter, W.M., Fioole, B., Fritschy, W.M., Jin, P.H.P.F.K., Geelkerken, R.H., van Gent, W.B., Glade, G.J., Govaert, B., Groenendijk, R.P.R., de Groot, H.G.W., van den Haak, R.F.F., de Haan, E.F.A., Hajer, G.F., Hamming, J.F., van Hattum, E.S., Hazenberg, C.E.V.B., Hedeman Joosten, P.P.h.A., Helleman, J.N., van der Hem, L.G., Hendriks, J.M., van Herwaarden, J.A., Heyligers, J.M.M., Hinnen, J.W., Hissink, R.J., Ho, G.H., den Hoed, P.T., Hoedt, M.T.C., van Hoek, F., Hoencamp, R., Hoffmann, W.H., Hoksbergen, A.W.J., Hollander, E.J.F., Huisman, L.C., Hulsebos, R.G., Huntjens, K.M.B., Idu, M.M., Jacobs, M.J.H.M., van der Jagt, M.F.P., Jansbeken, J.R.H., Janssen, R.J.L., Jiang, H.H.L., de Jong, S.C., Jongbloed-Winkel, T.A., Jongkind, V., Kapma, M.R., Keller, B.P.J.A., Jahrome, A.K., Kievit, J.K., Klemm, P.L., Klinkert jr, P., Koedam, N.A., Koelemaij, M.J.W., Kolkert, J.L.P., Koning, G.G., Koning, O.H.J., Konings, R., Krasznai, A.G., Kropman, R.H.J., Kruse, R.R., van der Laan, L., van der Laan, M.J., van Laanen, J.H.H., van Lammeren, G.W., Lamprou, D.A.A., Lardenoije, J.H.P., Lauret, G.J., Leenders, B.J.M., Legemate, D.A., Leijdekkers, V.J., Lemson, M.S., Lensvelt, M.M.A., Lijkwan, M.A., van der Linden, F.T.h.P.M., Lung, P.F. Liqui, Loos, M.J.A., Loubert, M.C., van de Luijtgaarden, K.M., Mahmoud, D.E.A.K., Manshanden, C.G., Mattens, E.C.J.L., Meerwaldt, R., Mees, B.M.E., Menting, T.P., Metz, R., de Mol van Otterloo, J.C.A., Molegraaf, M.J., Montauban van Swijndregt, Y.C.A., Morak, M.J.M., van de Mortel, R.H.W., Mulder, W., Nagesser, S.K., Naves, C.C.L.M., Nederhoed, J.H., Nevenzel, A.M., de Nie, A.J., Nieuwenhuis, D.H., van Nieuwenhuizen, R.C., Nieuwenhuizen, J., Nio, D., Oomen, A.P.A., Oranen, B.I., Oskam, J., Palamba, H.W., Peppelenbosch, A.G., van Petersen, A.S., Petri, B.J., Pierie, M.E.N., Ploeg, A.J., Pol, R.A., Ponfoort, E.D., Poyck, P.P.C., Prent, A., Raa, S. ten, Raymakers, J.T.F.J., Reichmann, B.L., Reijnen, M.M.P.J., de Ridder, J.A.M., Rijbroek, A., van Rijn, M.J.E., de Roo, R.A., Rouwet, E.V., Saleem, B.R., van Sambeek, M.R.H.M., Samyn, M.G., van ’t Sant, H.P., van Schaik, J., van Schaik, P.M., Scharn, D.M., Scheltinga, M.R.M., Schepers, A., Schlejen, P.M., Schlösser, F.J.V., Schol, F.P.G., Scholtes, V.P.W., Schouten, O., Schreve, M.A., Schurink, G.W.H., Sikkink, C.J.J.M., Slaa, A. te, Smeets, H.J., Smeets, L., Smeets, R.R., de Smet, A.A.E.A., Smit, P.C., Smits, T.M., Snoeijs, M.G.J., Sondakh, A.O., Speijers, M.J., van der Steenhoven, T.J., van Sterkenburg, S.M.M., Stigter, D.A.A., Stokmans, R.A., Strating, R.P., Stultiëns, G.N.M., Sybrandy, J.E.M., Teijink, J.A.W., Telgenkamp, B.J., Testroote, M.J.G., Tha-In, T., The, R.M., Thijsse, W.J., Thomassen, I., Tielliu, I.F.J., van Tongeren, R.B.M., Toorop, R.J., Tournoij, E., Truijers, M., Türkcan, K., Tutein Nolthenius, R.P., Ünlü, C., Vaes, R.H.D., Vahl, A.C., Veen, E.J., Veger, H.T.C., Veldman, M.G., Verhagen, H.J.M., Verhoeven, B.A.N., Vermeulen, C.F.W., Vermeulen, E.G.J., Vierhout, B.P., van der Vijver-Coppen, R.J., Visser, M.J.T., van der Vliet, J.A., van Vlijmen - van Keulen, C.J., van der Vorst, J.R., Vos, A.W.F., Vos, C.G., Vos, G.A., de Vos, B., Voûte, M.T., Vriens, B.H.R., Vriens, P.W.H.E., de Vries, D.K., de Vries, J.P.P.M., de Vries, M., de Vries, A.C., van der Waal, C., Waasdorp, E.J., Wallis de Vries, B.M., van Walraven, L.A., van Wanroi, J.L., Warlé, M.C., van Weel, V., van Well, A.M.E., Welten, G.M.J.M., Wever, J.J., Wiersema, A.M., Wikkeling, O.R.M., Willaert, W.I.M., Wille, J., Willems, M.C.M., Willigendael, E.M., Wilschut, E.D., Wisselink, W., Witte, M.E., Wittens, C.H.A., Wong, C.Y., Yazar, O., Yeung, K.K., Zeebregts, C.J.A.M., van Zeeland, M.L.P., Alberga, Anna J., Karthaus, Eleonora G., Wilschut, Janneke A., de Bruin, Jorg L., Akkersdijk, George P., Geelkerken, Robert H., Hamming, Jaap F., Wever, Jan J., and Verhagen, Hence J.M.

Published
2022
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35. Rationale and design of the PHOspholamban RElated CArdiomyopathy intervention STudy (i-PHORECAST)

Author

te Rijdt, W. P., Hoorntje, E. T., de Brouwer, R., Oomen, A., Amin, A., van der Heijden, J. F., Karper, J. C., Westenbrink, B. D., Silljé, H. H. W., te Riele, A. S. J. M., Wiesfeld, A. C. P., van Gelder, I. C., Willems, T. P., van der Zwaag, P. A., van Tintelen, J. P., Hillege, J. H., Tan, H. L., van Veldhuisen, D. J., Asselbergs, F. W., de Boer, R. A., Wilde, A. A. M., and van den Berg, M. P.

Published
2022
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41. Long-term observations of the pulsars in 47 Tucanae. I. A study of four elusive binary systems

Author

Ridolfi, A., Freire, P., Torne, P., Heinke, C. O., Berg, M. van den, Jordan, C., Kramer, M., Bassa, C. G., Sarkissian, J., D'Amico, N., Lorimer, D., Camilo, F., Manchester, R. N., and Lyne, A.

Subjects
Astrophysics - High Energy Astrophysical Phenomena
Abstract

For the past couple of decades, the Parkes radio telescope has been regularly observing the millisecond pulsars in 47 Tucanae (47 Tuc). This long-term timing program was designed to address a wide range of scientific issues related to these pulsars and the globular cluster where they are located. In this paper, the first of a series, we address one of these objectives: the characterization of four previously known binary pulsars for which no precise orbital parameters were known, namely 47 Tuc P, V, W and X (pulsars 47 Tuc R and Y are discussed elsewhere). We determined the previously unknown orbital parameters of 47 Tuc V and X and greatly improved those of 47 Tuc P and W. For pulsars W and X we obtained, for the first time, full coherent timing solutions across the whole data span, which allowed a much more detailed characterization of these systems. 47 Tuc W, a well-known tight eclipsing binary pulsar, exhibits a large orbital period variability, as expected for a system of its class. 47 Tuc X turns out to be in a wide, extremely circular, 10.9-day long binary orbit and its position is ~3.8 arcmin away from the cluster center, more than three times the distance of any other pulsar in 47 Tuc. These characteristics make 47 Tuc X a very different object with respect to the other pulsars of the cluster., Comment: Accepted for publication by MNRAS, 18 pages, 11 figures

Published
2016
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42. On Polya's inequality for torsional rigidity and first Dirichlet eigenvalue

Author

Berg, M. van den, Ferone, V., Nitsch, C., and Trombetti, C.

Subjects
Mathematics - Analysis of PDEs, 49J45, 49R05, 35P15, 47A75, 35J25
Abstract

Let $\Omega$ be an open set in Euclidean space with finite Lebesgue measure $|\Omega|$. We obtain some properties of the set function $F:\Omega\mapsto \R^+$ defined by $$ F(\Omega)=\frac{T(\Omega)\lambda_1(\Omega)}{|\Omega|} ,$$ where $T(\Omega)$ and $\lambda_1(\Omega)$ are the torsional rigidity and the first eigenvalue of the Dirichlet Laplacian respectively. We improve the classical P\'olya bound $F(\Omega)\le 1,$ and show that $$F(\Omega)\le 1- \nu_m T(\Omega)|\Omega|^{-1-\frac2m},$$ where $\nu_m$ depends only on $m$. For any $m=2,3,\dots$ and $\epsilon\in (0,1)$ we construct an open set $\Omega_{\epsilon}\subset \R^m$ such that $F(\Omega_{\epsilon})\ge 1-\epsilon$., Comment: 18 pages, 1 figure

Published
2016

43. Outcomes in Octogenarians and the Effect of Comorbidities After Intact Abdominal Aortic Aneurysm Repair in the Netherlands: A Nationwide Cohort Study

Author

Van den Akker, P.J., Akkersdijk, G.J., Akkersdijk, G.P., Akkersdijk, W.L., van Andringa de Kempenaer, M.G., Arts, C.H., Avontuur, J.A., Bakker, O.J., Balm, R., Barendregt, W.B., Bekken, J.A., Bender, M.H., Bendermacher, B.L., van den Berg, M., Berger, P., Beuk, R.J., Blankensteijn, J.D., Bleker, R.J., Blok, J.J., Bode, A.S., Bodegom, M.E., van der Bogt, K.E., Boll, A.P., Booster, M.H., Borger van der Burg, B.L., de Borst, G.J., Bos- van Rossum, W.T., Bosma, J., Botman, J.M., Bouwman, L.H., Brehm, V., de Bruijn, M.T., de Bruin, J.L., Brummel, P., van Brussel, J.P., Buijk, S.E., Buijs, M.A., Buimer, M.G., Burger, D.H., Buscher, H.C., Cancrinus, E., Castenmiller, P.H., Cazander, G., Coester, A.M., Cuypers, P.H., Daemen, J.H., Dawson, I., Dierikx, J.E., Dijkstra, M.L., Diks, J., Dinkelman, M.K., Dirven, M., Dolmans, D.E., van Doorn, R.C., van Dortmont, L.M., Drouven, J.W., van der Eb, M.M., Eefting, D., van Eijck, G.J., Elshof, J.W., Elsman, B.H., van der Elst, A., van Engeland, M.I., van Eps, R.G., Faber, M.J., de Fijter, W.M., Fioole, B., Fokkema, T.M., Frans, F.A., Fritschy, W.M., Fung Kon Jin, P.H., Geelkerken, R.H., van Gent, W.B., Glade, G.J., Govaert, B., Groenendijk, R.P., de Groot, H.G., van den Haak, R.F., de Haan, E.F., Hajer, G.F., Hamming, J.F., van Hattum, E.S., Hazenberg, C.E., Hedeman Joosten, P.P., Helleman, J.N., van der Hem, L.G., Hendriks, J.M., van Herwaarden, J.A., Heyligers, J.M., Hinnen, J.W., Hissink, R.J., Ho, G.H., den Hoed, P.T., Hoedt, M.T., van Hoek, F., Hoencamp, R., Hoffmann, W.H., Hogendoorn, W., Hoksbergen, A.W., Hollander, E.J., Hommes, M., Hopmans, C.J., Huisman, L.C., Hulsebos, R.G., Huntjens, K.M., Idu, M.M., Jacobs, M.J., van der Jagt, M.F., Jansbeken, J.R., Janssen, R.J., Jiang, H.H., de Jong, S.C., Jongbloed-Winkel, T.A., Jongkind, V., Kapma, M.R., Keller, B.P., Khodadade Jahrome, A., Kievit, J.K., Klemm, P.L., Klinkert, P., Koedam, N.A., Koelemaij, M.J., Kolkert, J.L., Koning, G.G., Koning, O.H., Konings, R., Krasznai, A.G., Krol, R.M., Kropman, R.H., Kruse, R.R., van der Laan, L., van der Laan, M.J., van Laanen, J.H., van Lammeren, G.W., Lamprou, D.A., Lardenoye, J.H., Lauret, G.J., Leenders, B.J., Legemate, D.A., Leijdekkers, V.J., Lemson, M.S., Lensvelt, M.M., Lijkwan, M.A., Lind, R.C., van der Linden, F.T., Liqui Lung, P.F., Loos, M.J., Loubert, M.C., van de Luijtgaarden, K.M., Mahmoud, D.E., Manshanden, C.G., Mattens, E.C., Meerwaldt, R., Mees, B.M., von Meijenfeldt, G.C., Menting, T.P., Metz, R., Minnee, R.C., de Mol van Otterloo, J.C., Molegraaf, M.J., Montauban van Swijndregt, Y.C., Morak, M.J., van de Mortel, R.H., Mulder, W., Nagesser, S.K., Naves, C.C., Nederhoed, J.H., Nevenzel-Putters, A.M., de Nie, A.J., Nieuwenhuis, D.H., Nieuwenhuizen, J., van Nieuwenhuizen, R.C., Nio, D., Noyez, V.J., Oomen, A.P., Oranen, B.I., Oskam, J., Palamba, H.W., Peppelenbosch, A.G., van Petersen, A.S., Petri, B.J., Pierie, M.E., Ploeg, A.J., Pol, R.A., Ponfoort, E.D., Post, I.C., Poyck, P.P., Prent, A., ten Raa, S., Raymakers, J.T., Reichart, M., Reichmann, B.L., Reijnen, M.M., de Ridder, J.A., Rijbroek, A., van Rijn, M.J., de Roo, R.A., Rouwet, E.V., Saleem, B.R., Salemans, P.B., van Sambeek, M.R., Samyn, M.G., van ’t Sant, H.P., van Schaik, J., van Schaik, P.M., Scharn, D.M., Scheltinga, M.R., Schepers, A., Schlejen, P.M., Schlosser, F.J., Schol, F.P., Scholtes, V.P., Schouten, O., Schreve, M.A., Schurink, G.W., Sikkink, C.J., te Slaa, A., Smeets, H.J., Smeets, L., Smeets, R.R., de Smet, A.A., Smit, P.C., Smits, T.M., Snoeijs, M.G., Sondakh, A.O., Speijers, M.J., van der Steenhoven, T.J., van Sterkenburg, S.M., Stigter, D.A., Stokmans, R.A., Strating, R.P., Stultiëns, G.N., Sybrandy, J.E., Teijink, J.A., Telgenkamp, B.J., Teraa, M., Testroote, M.J., Tha-In, T., The, R.M., Thijsse, W.J., Thomassen, I., Tielliu, I.F., van Tongeren, R.B., Toorop, R.J., Tournoij, E., Truijers, M., Türkcan, K., Tutein Nolthenius, R.P., Ünlü, Ç., Vaes, R.H., Vafi, A.A., Vahl, A.C., Veen, E.J., Veger, H.T., Veldman, M.G., Velthuis, S., Verhagen, H.J., Verhoeven, B.A., Vermeulen, C.F., Vermeulen, E.G., Vierhout, B.P., van der Vijver-Coppen, R.J., Visser, M.J., van der Vliet, J.A., Vlijmen - van Keulen, C.J., Voorhoeve, R., van der Vorst, J.R., Vos, A.W., de Vos, B., Vos, C.G., Vos, G.A., Voute, M.T., Vriens, B.H., Vriens, P.W., de Vries, A.C., de Vries, D.K., de Vries, J.P., de Vries, M., van der Waal, C., Waasdorp, E.J., Wallis de Vries, B.M., van Walraven, L.A., van Wanroij, J.L., Warlé, M.C., van de Water, W., van Weel, V., van Well, A.M., Welten, G.M., Welten, R.J., Wever, J.J., Wiersema, A.M., Wikkeling, O.R., Willaert, W.I., Wille, J., Willems, M.C., Willigendael, E.M., Wilschut, E.D., Wisselink, W., Witte, M.E., Wittens, C.H., Wong, C.Y., Wouda, R., Yazar, O., Yeung, K.K., Zeebregts, C.J., van Zeeland, M.L., Alberga, Anna J., Karthaus, Eleonora G., van Zwet, Erik W., de Bruin, Jorg L., van Herwaarden, Joost A., Wever, Jan J., and Verhagen, Hence J.M.

Published
2021
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45. Nationwide Study to Predict Colonic Ischemia after Abdominal Aortic Aneurysm Repair in The Netherlands

Author

Van den Akker, L.H., Van den Akker, P.J., Akkersdijk, G.J., Akkersdijk, G.P., Akkersdijk, W.L., van Andringa de Kempenaer, M.G., Arts, C.H., Avontuur, J.A., Baal, J.G., Bakker, O.J., Balm, R., Barendregt, W.B., Bender, M.H., Bendermacher, B.L., van den Berg, M., Berger, P., Beuk, R.J., Blankensteijn, J.D., Bleker, R.J., Bockel, J.H., Bodegom, M.E., Bogt, K.E., Boll, A.P., Booster, M.H., Borger van der Burg, B.L., de Borst, G.J., Bos-van Rossum, W.T., Bosma, J., Botman, J.M., Bouwman, L.H., Breek, J.C., Brehm, V., Brinckman, M.J., van den Broek, T.H., Brom, H.L., de Bruijn, M.T., de Bruin, J.L., Brummel, P., van Brussel, J.P., Buijk, S.E., Buimer, M.G., Burger, D.H., Buscher, H.C., den Butter, G., Cancrinus, E., Castenmiller, P.H., Cazander, G., Coveliers, H.M., Cuypers, P.H., Daemen, J.H., Dawson, I., Derom, A.F., Dijkema, A.R., Diks, J., Dinkelman, M.K., Dirven, M., Dolmans, D.E., van Doorn, R.C., van Dortmont, L.M., van der Eb, M.M., Eefting, D., van Eijck, G.J., Elshof, J.W., Elsman, B.H., van der Elst, A., van Engeland, M.I., van Eps, R.G., Faber, M.J., de Fijter, W.M., Fioole, B., Fritschy, W.M., Geelkerken, R.H., van Gent, W.B., Glade, G.J., Govaert, B., Groenendijk, R.P., de Groot, H.G., van den Haak, R.F., de Haan, E.F., Hajer, G.F., Hamming, J.F., van Hattum, E.S., Hazenberg, C.E., Hedeman Joosten, P.P., Helleman, J.N., van der Hem, L.G., Hendriks, J.M., van Herwaarden, J.A., Heyligers, J.M., Hinnen, J.W., Hissink, R.J., Ho, G.H., den Hoed, P.T., Hoedt, M.T., van Hoek, F., Hoencamp, R., Hoffmann, W.H., Hoksbergen, A.W., Hollander, E.J., Huisman, L.C., Hulsebos, R.G., Huntjens, K.M., Idu, M.M., Jacobs, M.J., van der Jagt, M.F., Jansbeken, J.R., Janssen, R.J., Jiang, H.H., de Jong, S.C., Jongkind, V., Kapma, M.R., Keller, B.P., Khodadade Jahrome, A., Kievit, J.K., Klemm, P.L., Klinkert, P., Knippenberg, B., Koedam, N.A., Koelemaij, M.J., Kolkert, J.L., Koning, G.G., Koning, O.H., Krasznai, A.G., Krol, R.M., Kropman, R.H., Kruse, R.R., van der Laan, L., van der Laan, M.J., van Laanen, J.H., Lardenoye, J.H., Lawson, J.A., Legemate, D.A., Leijdekkers, V.J., Lemson, M.S., Lensvelt, M.M., Lijkwan, M.A., Lind, R.C., van der Linden, F.T., Liqui Lung, P.F., Loos, M.J., Loubert, M.C., Mahmoud, D.E., Manshanden, C.G., Mattens, E.C., Meerwaldt, R., Mees, B.M., Metz, R., Minnee, R.C., de Mol van Otterloo, J.C., Moll, F.L., Montauban van Swijndregt, Y.C., Morak, M.J., van de Mortel, R.H., Mulder, W., Nagesser, S.K., Naves, C.C., Nederhoed, J.H., Nevenzel-Putters, A.M., de Nie, A.J., Nieuwenhuis, D.H., Nieuwenhuizen, J., van Nieuwenhuizen, R.C., Nio, D., Oomen, A.P., Oranen, B.I., Oskam, J., Palamba, H.W., Peppelenbosch, A.G., van Petersen, A.S., Peterson, T.F., Petri, B.J., Pierie, M.E., Ploeg, A.J., Pol, R.A., Ponfoort, E.D., Poyck, P.P., Prent, A., ten Raa, S., Raymakers, J.T., Reichart, M., Reichmann, B.L., Reijnen, M.M., Rijbroek, A., van Rijn, M.J., de Roo, R.A., Rouwet, E.V., Rupert, C.G., Saleem, B.R., van Sambeek, M.R., Samyn, M.G., van’t Sant, H.P., van Schaik, J., van Schaik, P.M., Scharn, D.M., Scheltinga, M.R., Schepers, A., Schlejen, P.M., Schlosser, F.J., Schol, F.P., Schouten, O., Schreinemacher, M.H., Schreve, M.A., Schurink, G.W., Sikkink, C.J., Siroen, M.P., te Slaa, A., Smeets, H.J., Smeets, L., de Smet, A.A., de Smit, P., Smit, P.C., Smits, T.M., Snoeijs, M.G., Sondakh, A.O., van der Steenhoven, T.J., van Sterkenburg, S.M., Stigter, D.A., Stigter, H., Strating, R.P., Stultiëns, G.N., Sybrandy, J.E., Teijink, J.A., Telgenkamp, B.J., Testroote, M.J., The, R.M., Thijsse, W.J., Tielliu, I.F., van Tongeren, R.B., Toorop, R.J., Tordoir, J.H., Tournoij, E., Truijers, M., Türkcan, K., Tutein Nolthenius, R.P., Ünlü, Ç., Vafi, A.A., Vahl, A.C., Veen, E.J., Veger, H.T., Veldman, M.G., Verhagen, H.J., Verhoeven, B.A., Vermeulen, C.F., Vermeulen, E.G., Vierhout, B.P., Visser, M.J., van der Vliet, J.A., Vlijmen-van Keulen, C.J., Voesten, H.G., Voorhoeve, R., Vos, A.W., de Vos, B., Vos, G.A., Vriens, B.H., Vriens, P.W., de Vries, A.C., de Vries, J.P., de Vries, M., van der Waal, C., Waasdorp, E.J., Wallis de Vries, B.M., van Walraven, L.A., van Wanroij, J.L., Warlé, M.C., van Weel, V., van Well, A.M., Welten, G.M., Welten, R.J., Wever, J.J., Wiersema, A.M., Wikkeling, O.R., Willaert, W.I., Wille, J., Willems, M.C., Willigendael, E.M., Wisselink, W., Witte, M.E., Wittens, C.H., Wolf-de Jonge, I.C., Yazar, O., Zeebregts, C.J., van Zeeland, M.L., Willemsen, Saskia Irene, ten Berge, Martijn Geert, Statius van Eps, Randolph George, Veger, Hugo Thomas Christian, van Overhagen, Hans, van Dijk, Lukas Carolus, Putter, Hein, and Wever, Jan Jacob

Published
2021
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47. Deep radio imaging of 47 Tuc identifies the peculiar X-ray source X9 as a new black hole candidate

Author

Miller-Jones, J. C. A., Strader, J., Heinke, C. O., Maccarone, T. J., Berg, M. van den, Knigge, C., Chomiuk, L., Noyola, E., Russell, T. D., Seth, A. C., and Sivakoff, G. R.

Subjects
Astrophysics - High Energy Astrophysical Phenomena
Abstract

We report the detection of steady radio emission from the known X-ray source X9 in the globular cluster 47 Tuc. With a double-peaked C IV emission line in its ultraviolet spectrum providing a clear signature of accretion, this source had been previously classified as a cataclysmic variable. In deep ATCA imaging from 2010 and 2013, we identified a steady radio source at both 5.5 and 9.0 GHz, with a radio spectral index (defined as $S_{\nu}\propto\nu^{\alpha}$) of $\alpha=-0.4\pm0.4$. Our measured flux density of $42\pm4$ microJy/beam at 5.5 GHz implies a radio luminosity ($\nu L_{\nu}$) of 5.8e27 erg/s, significantly higher than any previous radio detection of an accreting white dwarf. Transitional millisecond pulsars, which have the highest radio-to-X-ray flux ratios among accreting neutron stars (still a factor of a few below accreting black holes at the same X-ray luminosity), show distinctly different patterns of X-ray and radio variability than X9. When combined with archival X-ray measurements, our radio detection places 47 Tuc X9 very close to the radio/X-ray correlation for accreting black holes, and we explore the possibility that this source is instead a quiescent stellar-mass black hole X-ray binary. The nature of the donor star is uncertain; although the luminosity of the optical counterpart is consistent with a low-mass main sequence donor star, the mass transfer rate required to produce the high quiescent X-ray luminosity of 1e33 erg/s suggests the system may instead be ultracompact, with an orbital period of order 25 minutes. This is the fourth quiescent black hole candidate discovered to date in a Galactic globular cluster, and the only one with a confirmed accretion signature from its optical/ultraviolet spectrum., Comment: 15 pages, 6 figures, accepted for publication in MNRAS

Published
2015
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48. Discovery of near-ultraviolet counterparts to millisecond pulsars in the globular cluster 47 Tucanae

Author

Rivera-Sandoval, L. E., Berg, M. van den, Heinke, C. O., Cohn, H. N., Lugger, P. M., Freire, P., Anderson, J., Serenelli, A. M., Althaus, L. G., Cool, A. M., Grindlay, J. E., Edmonds, P. D., Wijnands, R., and Ivanova, N.

Subjects
Astrophysics - Solar and Stellar Astrophysics, Astrophysics - Astrophysics of Galaxies, Astrophysics - High Energy Astrophysical Phenomena
Abstract

We report the discovery of the likely white dwarf companions to radio millisecond pulsars 47 Tuc Q and 47 Tuc S in the globular cluster 47 Tucanae. These blue stars were found in near-ultraviolet images from the Hubble Space Telescope for which we derived accurate absolute astrometry, and are located at positions consistent with the radio coordinates to within 0.016 arcsec (0.2sigma). We present near-ultraviolet and optical colours for the previously identified companion to millisecond pulsar 47 Tuc U, and we unambiguously confirm the tentative prior identifications of the optical counterparts to 47 Tuc T and 47 Tuc Y. For the latter, we present its radio-timing solution for the first time. We find that all five near-ultraviolet counterparts have U300-B390 colours that are consistent with He white dwarf cooling models for masses ~0.16-0.3 Msun and cooling ages within ~0.1-6 Gyr. The Ha-R625 colours of 47 Tuc U and 47 Tuc T indicate the presence of a strong Ha absorption line, as expected for white dwarfs with an H envelope., Comment: Accepted for publication on MNRAS. 12 pages, 5 figures, 3 tables

Published
2015
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