Author: "Long, Knox S" / Publication Year Range: Last 3 years - Searchworks@Jio Institute Digital Library Search Results

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30 results on '"Long, Knox S"'

1. SIROCCO: A Publicly Available Monte Carlo Ionization and Radiative Transfer Code for Astrophysical Outflows

Author: Matthews, James H., Long, Knox S., Knigge, Christian, Sim, Stuart A., Parkinson, Edward J., Higginbottom, Nick, Mangham, Samuel W., Scepi, Nicolas, Wallis, Austen, Hewitt, Henrietta A., and Mosallanezhad, Amin
Subjects: Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Astrophysics of Galaxies, Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - Solar and Stellar Astrophysics
Abstract: Outflows are critical components of many astrophysical systems, including accreting compact binaries and active galactic nuclei (AGN). These outflows can significantly affect a system's evolution and alter its observational appearance by reprocessing the radiation produced by the central engine. Sirocco (Simulating Ionization and Radiation in Outflows Created by Compact Objects - or "the code formerly known as Python") is a Sobolev-based Monte Carlo ionization and radiative transfer code. It is designed to simulate the spectra produced by any system with an azimuthally-symmetric outflow, from spherical stellar winds to rotating, biconical accretion disc winds. Wind models can either be parametrized or imported, e.g. from hydrodynamical simulations. The radiation sources include an optically thick accretion disc and various central sources with flexible spectra and geometries. The code tracks the "photon packets" produced by the sources in any given simulation as they traverse and interact with the wind. The code assumes radiative near-equilibrium, so the thermal and ionization state can be determined iteratively from these interactions. Once the physical properties in the wind have converged, Sirocco can be used to generate synthetic spectra at a series of observer sightlines. Here, we describe the physical assumptions, operation, performance and limitations of the code. We validate it against tardis, cmfgen and cloudy, finding good agreement, and present illustrative synthetic spectra from disc winds in cataclysmic variables, tidal disruption events, AGN and X-ray binaries. Sirocco is publicly available on GitHub, alongside its associated data, documentation and sample input files covering a wide range of astrophysical applications., Comment: 26 pages, 16 figures. Submitted to MNRAS. This is the release paper for the SIROCCO code, which can be found at https://github.com/sirocco-rt/sirocco with links to documentation. Underlying data and figure scripts available at https://github.com/sirocco-rt/release-models -- comments on the code, paper or documentation are welcomed
Published: 2024

2. The Dark Energy Camera Magellanic Clouds Emission-Line Survey

Author: Points, Sean D., Long, Knox S., Blair, William P., Williams, Rosa, Chu, You-Hua, Winkler, P. Frank, White, Richard L., Rest, Armin, Li, Chuan-Jui, and Valdes, Francisco
Subjects: Astrophysics - Astrophysics of Galaxies
Abstract: We have used the Dark Energy Camera (DECam) on the CTIO Blanco 4-m telescope to perform a new emission-line survey of the Large Magellanic Cloud (LMC) using narrow-band H-alpha and [SII] filters in addition to a continuum band for use in creating pure emission-line images. We refer to this new survey as DeMCELS, to distinguish it from the earlier Magellanic Cloud Emission Line Survey (MCELS) that has been in service for nearly 25 years. DeMCELS covers $\sim 54$ degrees$^{2}$, encompassing most of the bright optical disk of the LMC. With DECam's pixel size of only 0.27", our DeMCELS survey provides a seeing-limited improvement of 3-5 times over MCELS and is comparable in depth, with surface brightness limits of 3.3E-17 erg cm$^{-2}$ s$^{-1}$ arcsec$^{-2}$ in H-alpha and 2.9E-17 erg cm$^{-2}$ s$^{-1}$ arcsec$^{-2}$ in H-alpha and [SII], respectively. DeMCELS provides detailed morphological information on nebulae of all scales, from the largest supershells to individual [HII] regions and supernova remnants, to bubbles of emission surrounding individual stars, and even to faint structures in the diffuse ionized gas of the LMC. Many complex regions of emission show significant variations in the ratio of [SII] to H-alpha, a sign of the mixture of shocks from stellar winds and/or supernovae with photoionization by embedded hot, young stars. We present the details of the observing strategy and data processing for this survey, and show selected results in comparison with previous data. A companion project for the Small Magellanic Cloud is in progress and will be reported separately. We are making these new data available to the community at large via the NOIRLab's Data Lab site., Comment: 30 pages, 16 figures Accepted for publication (ApJ)
Published: 2024
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3. A multi-dimensional view of a unified model for TDEs

Author: Parkinson, Edward J., Knigge, Christian, Dai, Lixin, Thomsen, Lars Lund, Matthews, James H., and Long, Knox S.
Subjects: Astrophysics - High Energy Astrophysical Phenomena
Abstract: Tidal disruption events (TDEs) can generate non-spherical, relativistic and optically thick outflows. Simulations show that the radiation we observe is reprocessed by these outflows. According to a unified model suggested by these simulations, the spectral energy distributions (SEDs) of TDEs depend strongly on viewing angle: low [high] optical-to-X-ray ratios (OXRs) correspond to face-on [edge-on] orientations. Post-processing with radiative transfer codes have simulated the emergent spectra, but have so far been carried out only in a quasi-1D framework, with three atomic species (H, He and O). Here, we present 2.5D Monte Carlo radiative transfer simulations which model the emission from a non-spherical outflow, including a more comprehensive set of cosmically abundant species. While the basic trend of OXR increasing with inclination is preserved, the inherently multi-dimensional nature of photon transport through the non-spherical outflow significantly affects the emergent SEDs. Relaxing the quasi-1D approximation allows photons to preferentially escape in (polar) directions of lower optical depth, resulting in a greater variation of bolometric luminosity as a function of inclination. According to our simulations, inclination alone may not fully explain the large dynamic range of observed TDE OXRs. We also find that including metals, other than Oxygen, changes the emergent spectra significantly, resulting in stronger absorption and emission lines in the extreme ultraviolet, as well a greater variation in the OXR as a function of inclination. Whilst our results support previously proposed unified models for TDEs, they also highlight the critical importance of multi-dimensional ionization and radiative transfer., Comment: 17 pages, 15 figures. Submitted to MNRAS
Published: 2024

4. Cataclysmic variables from Sloan Digital Sky Survey -- V (2020-2023) identified using machine learning

Author: Inight, Keith, Gänsicke, Boris T., Schwope, Axel, Anderson, Scott F., Breedt, Elmé, Brownstein, Joel R., Demasi, Sebastian, Friedrich, Susanne, Hermes, J. J., Long, Knox S., Mulvany, Timothy, Pallathadka, Gautham A., Salvato, Mara, Scaringi, Simone, Schreiber, Matthias R., Stringfellow, Guy S., Thorstensen, John R., Tovmassian, Gagik, and Zakamska, Nadia L.
Subjects: Astrophysics - Solar and Stellar Astrophysics, Astrophysics - Astrophysics of Galaxies
Abstract: SDSS-V is carrying out a dedicated survey for white dwarfs, single and in binaries, and we report the analysis of the spectroscopy of 504 cataclysmic variables (CVs) and CV candidates obtained during the first 34 months of observations of SDSS-V. We developed a convolutional neural network (CNN) to aid with the identification of CV candidates among the over 2 million SDSS-V spectra obtained with the BOSS spectrograph. The CNN reduced the number of spectra that required visual inspection to $\simeq2$ per cent of the total. We identified 776 CV spectra among the CNN-selected candidates, plus an additional 27 CV spectra that the CNN misclassified, but that were found serendipitously by human inspection of the data. Analysing the SDSS-V spectroscopy and ancillary data of the 504 CVs in our sample, we report 61 new CVs, spectroscopically confirm 248 and refute 13 published CV candidates, and we report 82 new or improved orbital periods. We discuss the completeness and possible selection biases of the machine learning methodology, as well as the effectiveness of targeting CV candidates within SDSS-V. Finally, we re-assess the space density of CVs, and find $1.2\times 10^{-5}\,\mathrm{pc^{-3}}$., Comment: Accepted by MNRAS. 24 pages, 25 figures. Supplementary data substantially updated from previous version and contains details of 504 CVs including spectra and light curves
Published: 2024

5. A disc wind origin for the optical spectra of dwarf novae in outburst

Author: Tampo, Yusuke, Knigge, Christian, Long, Knox S., Matthews, James H., and Segura, Noel Castro
Subjects: Astrophysics - Solar and Stellar Astrophysics, Astrophysics - High Energy Astrophysical Phenomena
Abstract: Many high-state cataclysmic variables (CVs) exhibit blue-shifted absorption features in their ultraviolet (UV) spectra -- a smoking-gun signature of outflows. However, the impact of these outflows on {\em optical} spectra remains much more uncertain. During its recent outburst, the eclipsing dwarf nova V455 And displayed strong optical emission lines whose cores were narrower than expected from a Keplerian disc. Here, we explore whether disc + wind models developed for matching UV observations of CVs can also account for these optical spectra. Importantly, V455~And was extremely bright at outburst maximum: the accretion rate implied by fitting the optical continuum with a standard disc model is $\dot{M}_{\rm acc} \simeq 10^{-7}~{\rm M}_\odot~{\rm yr^{-1}}$. Allowing for continuum reprocessing in the outflow helps to relax this constraint. A disk wind can also broadly reproduce the optical emission lines, but only if the wind is (i) highly mass-loaded, with a mass-loss rate reaching $\dot{M}_{\rm wind} \simeq 0.4 \dot{M}_{\rm acc}$, and/or (ii) clumpy, with a volume filling factor $f_V \simeq 0.1$. The same models can describe the spectral evolution across the outburst, simply by lowering $\dot{M}_{\rm acc}$ and $\dot{M}_{\rm wind}$. Extending these models to lower inclinations and into the UV produces spectra consistent with those observed in face-on high-state CVs. We also find, for the first time in simulations of this type, P-Cygni-like absorption features in the Balmer series, as have been observed in both CVs and X-ray binaries. Overall, dense disc winds provide a promising framework for explaining multiple observational signatures seen in high-state CVs, but theoretical challenges persist., Comment: 13 pages, 9 figures, 3 tables. Accepted for publication in MNRAS
Published: 2024

6. The SDSS-V Local Volume Mapper (LVM): Scientific Motivation and Project Overview

Author: Drory, Niv, Blanc, Guillermo A., Kreckel, Kathryn, Sanchez, Sebastian F., Mejia-Narvaez, Alfredo, Johnston, Evelyn J., Jones, Amy M., Pellegrini, Eric W., Konidaris, Nicholas P., Herbst, Tom, Sanchez-Gallego, Jose, Kollmeier, Juna A., de Almeida, Florence, Barrera-Ballesteros, Jorge K., Bizyaev, Dmitry, Brownstein, Joel R., Saguer, Mar Canal i, Cherinka, Brian, Cioni, Maria-Rosa L., Congiu, Enrico, Cosens, Maren, Dias, Bruno, Donor, John, Egorov, Oleg, Egorova, Evgeniia, Froning, Cynthia S., Garcia, Pablo, Glover, Simon C. O., Greve, Hannah, Haeberle, Maximilian, Hoy, Kevin, Ibarra, Hector, Li, Jing, Klessen, Ralf S., Krishnarao, Dhanesh, Kumari, Nimisha, Long, Knox S., Mendez-Delgado, Jose Eduardo, Popa, Silvia Anastasia, Ramirez, Solange, Rix, Hans-Walter, Sanchez, Aurora Mata, Sankrit, Ravi, Sattler, Natascha, Sayres, Conor, Singh, Amrita, Stringfellow, Guy, Wachter, Stefanie, Watkins, Elizabeth Jayne, Wong, Tony, and Wofford, Aida
Subjects: Astrophysics - Astrophysics of Galaxies
Abstract: We present the Sloan Digital Sky Survey V (SDSS-V) Local Volume Mapper (LVM). The LVM is an integral-field spectroscopic survey of the Milky Way, Magellanic Clouds, and of a sample of local volume galaxies, connecting resolved pc-scale individual sources of feedback to kpc-scale ionized interstellar medium (ISM) properties. The 4-year survey covers the southern Milky Way disk at spatial resolutions of 0.05 to 1 pc, the Magellanic Clouds at 10 pc resolution, and nearby large galaxies at larger scales totaling $>4300$ square degrees of sky, and more than 55M spectra. It utilizes a new facility of alt-alt mounted siderostats feeding 16 cm refractive telescopes, lenslet-coupled fiber-optics, and spectrographs covering 3600-9800A at R ~ 4000. The ultra-wide field IFU has a diameter of 0.5 degrees with 1801 hexagonally packed fibers of 35.3 arcsec apertures. The siderostats allow for a completely stationary fiber system, avoiding instability of the line spread function seen in traditional fiber feeds. Scientifically, LVM resolves the regions where energy, momentum, and chemical elements are injected into the ISM at the scale of gas clouds, while simultaneously charting where energy is being dissipated (via cooling, shocks, turbulence, bulk flows, etc.) to global scales. This combined local and global view enables us to constrain physical processes regulating how stellar feedback operates and couples to galactic kinematics and disk-scale structures, such as the bar and spiral arms, as well as gas in- and out-flows., Comment: 29 pages, 12 figures, accepted for publication in The Astronomical Journal
Published: 2024

7. State-of-the-art simulations of line-driven accretion disc winds: realistic radiation-hydrodynamics leads to weaker outflows

Author: Higginbottom, Nick, Scepi, Nicolas, Knigge, Christian, Long, Knox S., Matthews, James H., and Sim, Stuart A.
Subjects: Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Astrophysics of Galaxies, Astrophysics - Solar and Stellar Astrophysics
Abstract: Disc winds are a common feature in accreting astrophysical systems on all scales. In active galactic nuclei (AGN) and accreting white dwarfs (AWDs), specifically, radiation pressure mediated by spectral lines is a promising mechanism for driving these outflows. Previous hydrodynamical simulations have largely supported this idea, but relied on highly approximate treatments of ionization and radiative transfer. Given the sensitivity of line driving to the ionization state and radiation field in the outflow, here we present a new method for carrying out 2.5D radiation-hydrodynamic simulations that takes full account of the frequency-dependent radiative transfer through the wind, the corresponding ionization state and the resulting radiative accelerations. Applying our method to AWDs, we find that it is much harder to drive a powerful line-driven outflow when the interaction between matter and radiation is treated self-consistently. This conclusion is robust to changes in the adopted system parameters. The fundamental difficulty is that discs luminous enough to drive such a wind are also hot enough to over-ionize it. As a result, the mass-loss rates in our simulations are much lower than those found in earlier, more approximate calculations. We also show that the ultraviolet spectra produced by our simulations do not match those observed in AWDs. We conclude that, unless the over-ionization problem can be mitigated (e.g. by sub-grid clumping or a softer-than-expected radiation field), line driving may not be a promising mechanism for powering the outflows from AWDs. These conclusions are likely to have significant implications for disc winds in AGN also., Comment: Accepted for publication in MNRAS. 14 pages, 10 figures + 3 figures in Appendix
Published: 2023

8. Supernova Remnants in the Irregular Galaxy NGC4449

Author: Winkler, P. Frank, Long, Knox S., and Blair, William P.
Subjects: Astrophysics - Astrophysics of Galaxies, Astrophysics - Cosmology and Nongalactic Astrophysics, Astrophysics - Solar and Stellar Astrophysics
Abstract: The nearby irregular galaxy NGC4449 has a star formation rate of about 0.4 solar masses/yr and should host of order 70 SNRs younger than 20,000 years, a typical age for SNRs expanding into to an ISM with unit density to reach the radiative phase. We have carried out an optical imaging and spectroscopic survey in an attempt to identify these SNRs. This task is challenging because diffuse gas with elevated ratios of [SII]:H-alpha is omnipresent in NGC4449, {causing confusion when using this common diagnostic for SNRs. Using narrow-band interference-filter images, we first identified 49 objects that have elevated [SII]:H-alpha ratios compared to nearby HII regions. Using Gemini-N and GMOS, we then obtained high-resolution spectra of 30 of these SNR candidates, 25 of which have [SII]:H-alpha ratios greater than 0.5. Of these, 15 nebulae are almost certainly SNRs, based on a combination of characteristics: higher [OI]:H-alpha ratios and broader line widths than observed from HII regions. The remainder are good candidates as well, but need additional confirmation. Surprisingly, despite having superior imaging and spectroscopic data sets to examine, we are unable to confirm most of the candidates suggested by Leonidaki (2013). While NGC4449 is likely an extreme case because of the high surface brightness and elevated [SII]:H-alpha ratio of diffuse gas, it highlights the need for sensitive high-resolution optical spectroscopy, or high spatial resolution radio or X-ray observations that can ensure accurate SNR identifications in external galaxies.
Published: 2023

9. A disc wind model for blueshifts in quasar broad emission lines

Author: Matthews, James H., Strong-Wright, Jago, Knigge, Christian, Hewett, Paul, Temple, Matthew J., Long, Knox S., Rankine, Amy L., Stepney, Matthew, Banerji, Manda, and Richards, Gordon T.
Subjects: Astrophysics - Astrophysics of Galaxies, Astrophysics - High Energy Astrophysical Phenomena
Abstract: Blueshifts - or, more accurately, blue asymmetries - in broad emission lines such as CIV $\lambda$1550 are common in luminous quasars and correlate with fundamental properties such as Eddington ratio and broad absorption line (BAL) characteristics. However, the formation of these blueshifts is still not understood, and neither is their physical connection to the BAL phenomenon or accretion disc. In this work, we present Monte Carlo radiative transfer and photoionization simulations using parametrized biconical disc-wind models. We take advantage of the azimuthal symmetry of a quasar and show that we can reproduce CIV blueshifts provided that (i) the disc-midplane is optically thick out to radii beyond the line formation region, so that the receding wind bicone is obscured; and (ii) the system is viewed from relatively low (that is, more face-on) inclinations ($\lesssim40^\circ$). We show that CIV emission line blueshifts and BALs can form in the same wind structure. The velocity profile of the wind has a significant impact on the location of the line formation region and the resulting line profile, suggesting that the shape of the emission lines can be used as a probe of wind-driving physics. While we are successful at producing blueshifts/blue asymmetries in outflows, we struggle to match the detailed shape or skew of the observed emission line profiles. In addition, our models produce redshifted emission-line asymmetries for certain viewing angles. We discuss our work in the context of the CIV $\lambda$1550 emission blueshift versus equivalent-width space and explore the implications for quasar disc wind physics., Comment: 20 pages, 12 figures + 1 appendix. Supplementary material, simulation data and plotting scripts available at: https://github.com/jhmatthews/blueshifts
Published: 2023
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10. The James Webb Space Telescope Mission

Author: Gardner, Jonathan P., Mather, John C., Abbott, Randy, Abell, James S., Abernathy, Mark, Abney, Faith E., Abraham, John G., Abraham, Roberto, Abul-Huda, Yasin M., Acton, Scott, Adams, Cynthia K., Adams, Evan, Adler, David S., Adriaensen, Maarten, Aguilar, Jonathan Albert, Ahmed, Mansoor, Ahmed, Nasif S., Ahmed, Tanjira, Albat, Rüdeger, Albert, Loïc, Alberts, Stacey, Aldridge, David, Allen, Mary Marsha, Allen, Shaune S., Altenburg, Martin, Altunc, Serhat, Alvarez, Jose Lorenzo, Álvarez-Márquez, Javier, de Oliveira, Catarina Alves, Ambrose, Leslie L., Anandakrishnan, Satya M., Andersen, Gregory C., Anderson, Harry James, Anderson, Jay, Anderson, Kristen, Anderson, Sara M., Aprea, Julio, Archer, Benita J., Arenberg, Jonathan W., Argyriou, Ioannis, Arribas, Santiago, Artigau, Étienne, Arvai, Amanda Rose, Atcheson, Paul, Atkinson, Charles B., Averbukh, Jesse, Aymergen, Cagatay, Bacinski, John J., Baggett, Wayne E., Bagnasco, Giorgio, Baker, Lynn L., Balzano, Vicki Ann, Banks, Kimberly A., Baran, David A., Barker, Elizabeth A., Barrett, Larry K., Barringer, Bruce O., Barto, Allison, Bast, William, Baudoz, Pierre, Baum, Stefi, Beatty, Thomas G., Beaulieu, Mathilde, Bechtold, Kathryn, Beck, Tracy, Beddard, Megan M., Beichman, Charles, Bellagama, Larry, Bely, Pierre, Berger, Timothy W., Bergeron, Louis E., Darveau-Bernier, Antoine, Bertch, Maria D., Beskow, Charlotte, Betz, Laura E., Biagetti, Carl P., Birkmann, Stephan, Bjorklund, Kurt F., Blackwood, James D., Blazek, Ronald Paul, Blossfeld, Stephen, Bluth, Marcel, Boccaletti, Anthony, Boegner Jr., Martin E., Bohlin, Ralph C., Boia, John Joseph, Böker, Torsten, Bonaventura, N., Bond, Nicholas A., Bosley, Kari Ann, Boucarut, Rene A., Bouchet, Patrice, Bouwman, Jeroen, Bower, Gary, Bowers, Ariel S., Bowers, Charles W., Boyce, Leslye A., Boyer, Christine T., Boyer, Martha L., Boyer, Michael, Boyer, Robert, Bradley, Larry D., Brady, Gregory R., Brandl, Bernhard R., Brannen, Judith L., Breda, David, Bremmer, Harold G., Brennan, David, Bresnahan, Pamela A., Bright, Stacey N., Broiles, Brian J., Bromenschenkel, Asa, Brooks, Brian H., Brooks, Keira J., Brown, Bob, Brown, Bruce, Brown, Thomas M., Bruce, Barry W., Bryson, Jonathan G., Bujanda, Edwin D., Bullock, Blake M., Bunker, A. J., Bureo, Rafael, Burt, Irving J., Bush, James Aaron, Bushouse, Howard A., Bussman, Marie C., Cabaud, Olivier, Cale, Steven, Calhoon, Charles D., Calvani, Humberto, Canipe, Alicia M., Caputo, Francis M., Cara, Mihai, Carey, Larkin, Case, Michael Eli, Cesari, Thaddeus, Cetorelli, Lee D., Chance, Don R., Chandler, Lynn, Chaney, Dave, Chapman, George N., Charlot, S., Chayer, Pierre, Cheezum, Jeffrey I., Chen, Bin, Chen, Christine H., Cherinka, Brian, Chichester, Sarah C., Chilton, Zachary S., Chittiraibalan, Dharini, Clampin, Mark, Clark, Charles R., Clark, Kerry W., Clark, Stephanie M., Claybrooks, Edward E., Cleveland, Keith A., Cohen, Andrew L., Cohen, Lester M., Colón, Knicole D., Coleman, Benee L., Colina, Luis, Comber, Brian J., Comeau, Thomas M., Comer, Thomas, Reis, Alain Conde, Connolly, Dennis C., Conroy, Kyle E., Contos, Adam R., Contreras, James, Cook, Neil J., Cooper, James L., Cooper, Rachel Aviva, Correia, Michael F., Correnti, Matteo, Cossou, Christophe, Costanza, Brian F., Coulais, Alain, Cox, Colin R., Coyle, Ray T., Cracraft, Misty M., Noriega-Crespo, Alberto, Crew, Keith A., Curtis, Gary J., Cusveller, Bianca, Maciel, Cleyciane Da Costa, Dailey, Christopher T., Daugeron, Frédéric, Davidson, Greg S., Davies, James E., Davis, Katherine Anne, Davis, Michael S., Day, Ratna, de Chambure, Daniel, de Jong, Pauline, De Marchi, Guido, Dean, Bruce H., Decker, John E., Delisa, Amy S., Dell, Lawrence C., Dellagatta, Gail, Dembinska, Franciszka, Demosthenes, Sandor, Dencheva, Nadezhda M., Deneu, Philippe, DePriest, William W., Deschenes, Jeremy, Dethienne, Nathalie, Detre, Örs Hunor, Diaz, Rosa Izela, Dicken, Daniel, DiFelice, Audrey S., Dillman, Matthew, Disharoon, Maureen O., van Dishoeck, Ewine F., Dixon, William V., Doggett, Jesse B., Dominguez, Keisha L., Donaldson, Thomas S., Doria-Warner, Cristina M., Santos, Tony Dos, Doty, Heather, Douglas Jr., Robert E., Doyon, René, Dressler, Alan, Driggers, Jennifer, Driggers, Phillip A., Dunn, Jamie L., DuPrie, Kimberly C., Dupuis, Jean, Durning, John, Dutta, Sanghamitra B., Earl, Nicholas M., Eccleston, Paul, Ecobichon, Pascal, Egami, Eiichi, Ehrenwinkler, Ralf, Eisenhamer, Jonathan D., Eisenhower, Michael, Eisenstein, Daniel J., Hamel, Zaky El, Elie, Michelle L., Elliott, James, Elliott, Kyle Wesley, Engesser, Michael, Espinoza, Néstor, Etienne, Odessa, Etxaluze, Mireya, Evans, Leah, Fabreguettes, Luce, Falcolini, Massimo, Falini, Patrick R., Fatig, Curtis, Feeney, Matthew, Feinberg, Lee D., Fels, Raymond, Ferdous, Nazma, Ferguson, Henry C., Ferrarese, Laura, Ferreira, Marie-Héléne, Ferruit, Pierre, Ferry, Malcolm, Filippazzo, Joseph Charles, Firre, Daniel, Fix, Mees, Flagey, Nicolas, Flanagan, Kathryn A., Fleming, Scott W., Florian, Michael, Flynn, James R., Foiadelli, Luca, Fontaine, Mark R., Fontanella, Erin Marie, Forshay, Peter Randolph, Fortner, Elizabeth A., Fox, Ori D., Framarini, Alexandro P., Francisco, John I., Franck, Randy, Franx, Marijn, Franz, David E., Friedman, Scott D., Friend, Katheryn E., Frost, James R., Fu, Henry, Fullerton, Alexander W., Gaillard, Lionel, Galkin, Sergey, Gallagher, Ben, Galyer, Anthony D., Marín, Macarena García, Gardner, Lisa E., Garland, Dennis, Garrett, Bruce Albert, Gasman, Danny, Gáspár, András, Gastaud, René, Gaudreau, Daniel, Gauthier, Peter Timothy, Geers, Vincent, Geithner, Paul H., Gennaro, Mario, Gerber, John, Gereau, John C., Giampaoli, Robert, Giardino, Giovanna, Gibbons, Paul C., Gilbert, Karolina, Gilman, Larry, Girard, Julien H., Giuliano, Mark E., Gkountis, Konstantinos, Glasse, Alistair, Glassmire, Kirk Zachary, Glauser, Adrian Michael, Glazer, Stuart D., Goldberg, Joshua, Golimowski, David A., Gonzaga, Shireen P., Gordon, Karl D., Gordon, Shawn J., Goudfrooij, Paul, Gough, Michael J., Graham, Adrian J., Grau, Christopher M., Green, Joel David, Greene, Gretchen R., Greene, Thomas P., Greenfield, Perry E., Greenhouse, Matthew A., Greve, Thomas R., Greville, Edgar M., Grimaldi, Stefano, Groe, Frank E., Groebner, Andrew, Grumm, David M., Grundy, Timothy, Güdel, Manuel, Guillard, Pierre, Guldalian, John, Gunn, Christopher A., Gurule, Anthony, Gutman, Irvin Meyer, Guy, Paul D., Guyot, Benjamin, Hack, Warren J., Haderlein, Peter, Hagan, James B., Hagedorn, Andria, Hainline, Kevin, Haley, Craig, Hami, Maryam, Hamilton, Forrest Clifford, Hammann, Jeffrey, Hammel, Heidi B., Hanley, Christopher J., Hansen, Carl August, Hardy, Bruce, Harnisch, Bernd, Harr, Michael Hunter, Harris, Pamela, Hart, Jessica Ann, Hartig, George F., Hasan, Hashima, Hashim, Kathleen Marie, Hashimoto, Ryan, Haskins, Sujee J., Hawkins, Robert Edward, Hayden, Brian, Hayden, William L., Healy, Mike, Hecht, Karen, Heeg, Vince J., Hejal, Reem, Helm, Kristopher A., Hengemihle, Nicholas J., Henning, Thomas, Henry, Alaina, Henry, Ronald L., Henshaw, Katherine, Hernandez, Scarlin, Herrington, Donald C., Heske, Astrid, Hesman, Brigette Emily, Hickey, David L., Hilbert, Bryan N., Hines, Dean C., Hinz, Michael R., Hirsch, Michael, Hitcho, Robert S., Hodapp, Klaus, Hodge, Philip E., Hoffman, Melissa, Holfeltz, Sherie T., Holler, Bryan Jason, Hoppa, Jennifer Rose, Horner, Scott, Howard, Joseph M., Howard, Richard J., Huber, Jean M., Hunkeler, Joseph S., Hunter, Alexander, Hunter, David Gavin, Hurd, Spencer W., Hurst, Brendan J., Hutchings, John B., Hylan, Jason E., Ignat, Luminita Ilinca, Illingworth, Garth, Irish, Sandra M., Isaacs III, John C., Jackson Jr., Wallace C., Jaffe, Daniel T., Jahic, Jasmin, Jahromi, Amir, Jakobsen, Peter, James, Bryan, James, John C., James, LeAndrea Rae, Jamieson, William Brian, Jandra, Raymond D., Jayawardhana, Ray, Jedrzejewski, Robert, Jeffers, Basil S., Jensen, Peter, Joanne, Egges, Johns, Alan T., Johnson, Carl A., Johnson, Eric L., Johnson, Patricia, Johnson, Phillip Stephen, Johnson, Thomas K., Johnson, Timothy W., Johnstone, Doug, Jollet, Delphine, Jones, Danny P., Jones, Gregory S., Jones, Olivia C., Jones, Ronald A., Jones, Vicki, Jordan, Ian J., Jordan, Margaret E., Jue, Reginald, Jurkowski, Mark H., Justis, Grant, Justtanont, Kay, Kaleida, Catherine C., Kalirai, Jason S., Kalmanson, Phillip Cabrales, Kaltenegger, Lisa, Kammerer, Jens, Kan, Samuel K., Kanarek, Graham Childs, Kao, Shaw-Hong, Karakla, Diane M., Karl, Hermann, Kassin, Susan A., Kauffman, David D., Kavanagh, Patrick, Kelley, Leigh L., Kelly, Douglas M., Kendrew, Sarah, Kennedy, Herbert V., Kenny, Deborah A., Keski-Kuha, Ritva A., Keyes, Charles D., Khan, Ali, Kidwell, Richard C., Kimble, Randy A., King, James S., King, Richard C., Kinzel, Wayne M., Kirk, Jeffrey R., Kirkpatrick, Marc E., Klaassen, Pamela, Klingemann, Lana, Klintworth, Paul U., Knapp, Bryan Adam, Knight, Scott, Knollenberg, Perry J., Knutsen, Daniel Mark, Koehler, Robert, Koekemoer, Anton M., Kofler, Earl T., Kontson, Vicki L., Kovacs, Aiden Rose, Kozhurina-Platais, Vera, Krause, Oliver, Kriss, Gerard A., Krist, John, Kristoffersen, Monica R., Krogel, Claudia, Krueger, Anthony P., Kulp, Bernard A., Kumari, Nimisha, Kwan, Sandy W., Kyprianou, Mark, Labador, Aurora Gadiano, Labiano, Álvaro, Lafrenière, David, Lagage, Pierre-Olivier, Laidler, Victoria G., Laine, Benoit, Laird, Simon, Lajoie, Charles-Philippe, Lallo, Matthew D., Lam, May Yen, LaMassa, Stephanie Marie, Lambros, Scott D., Lampenfield, Richard Joseph, Lander, Matthew Ed, Langston, James Hutton, Larson, Kirsten, Larson, Melora, LaVerghetta, Robert Joseph, Law, David R., Lawrence, Jon F., Lee, David W., Lee, Janice, Lee, Yat-Ning Paul, Leisenring, Jarron, Leveille, Michael Dunlap, Levenson, Nancy A., Levi, Joshua S., Levine, Marie B., Lewis, Dan, Lewis, Jake, Lewis, Nikole, Libralato, Mattia, Lidon, Norbert, Liebrecht, Paula Louisa, Lightsey, Paul, Lilly, Simon, Lim, Frederick C., Lim, Pey Lian, Ling, Sai-Kwong, Link, Lisa J., Link, Miranda Nicole, Lipinski, Jamie L., Liu, XiaoLi, Lo, Amy S., Lobmeyer, Lynette, Logue, Ryan M., Long, Chris A., Long, Douglas R., Long, Ilana D., Long, Knox S., López-Caniego, Marcos, Lotz, Jennifer M., Love-Pruitt, Jennifer M., Lubskiy, Michael, Luers, Edward B., Luetgens, Robert A., Luevano, Annetta J., Lui, Sarah Marie G. Flores, Lund III, James M., Lundquist, Ray A., Lunine, Jonathan, Lützgendorf, Nora, Lynch, Richard J., MacDonald, Alex J., MacDonald, Kenneth, Macias, Matthew J., Macklis, Keith I., Maghami, Peiman, Maharaja, Rishabh Y., Maiolino, Roberto, Makrygiannis, Konstantinos G., Malla, Sunita Giri, Malumuth, Eliot M., Manjavacas, Elena, Marini, Andrea, Marrione, Amanda, Marston, Anthony, Martel, André R, Martin, Didier, Martin, Peter G., Martinez, Kristin L., Maschmann, Marc, Masci, Gregory L., Masetti, Margaret E., Maszkiewicz, Michael, Matthews, Gary, Matuskey, Jacob E., McBrayer, Glen A., McCarthy, Donald W., McCaughrean, Mark J., McClare, Leslie A., McClare, Michael D., McCloskey, John C., McClurg, Taylore D., McCoy, Martin, McElwain, Michael W., McGregor, Roy D., McGuffey, Douglas B., McKay, Andrew G., McKenzie, William K., McLean, Brian, McMaster, Matthew, McNeil, Warren, De Meester, Wim, Mehalick, Kimberly L., Meixner, Margaret, Meléndez, Marcio, Menzel, Michael P., Menzel, Michael T., Merz, Matthew, Mesterharm, David D., Meyer, Michael R., Meyett, Michele L., Meza, Luis E., Midwinter, Calvin, Milam, Stefanie N., Miller, Jay Todd, Miller, William C., Miskey, Cherie L., Misselt, Karl, Mitchell, Eileen P., Mohan, Martin, Montoya, Emily E., Moran, Michael J., Morishita, Takahiro, Moro-Martín, Amaya, Morrison, Debra L., Morrison, Jane, Morse, Ernie C., Moschos, Michael, Moseley, S. H., Mosier, Gary E., Mosner, Peter, Mountain, Matt, Muckenthaler, Jason S., Mueller, Donald G., Mueller, Migo, Muhiem, Daniella, Mühlmann, Prisca, Mullally, Susan Elizabeth, Mullen, Stephanie M., Munger, Alan J, Murphy, Jess, Murray, Katherine T., Muzerolle, James C., Mycroft, Matthew, Myers, Andrew, Myers, Carey R., Myers, Fred Richard R., Myers, Richard, Myrick, Kaila, Nagle IV, Adrian F., Nayak, Omnarayani, Naylor, Bret, Neff, Susan G., Nelan, Edmund P., Nella, John, Nguyen, Duy Tuong, Nguyen, Michael N., Nickson, Bryony, Nidhiry, John Joseph, Niedner, Malcolm B., Nieto-Santisteban, Maria, Nikolov, Nikolay K., Nishisaka, Mary Ann, Nota, Antonella, O'Mara, Robyn C., Oboryshko, Michael, O'Brien, Marcus B., Ochs, William R., Offenberg, Joel D., Ogle, Patrick Michael, Ohl, Raymond G., Olmsted, Joseph Hamden, Osborne, Shannon Barbara, O'Shaughnessy, Brian Patrick, Östlin, Göran, O'Sullivan, Brian, Otor, O. Justin, Ottens, Richard, Ouellette, Nathalie N. -Q., Outlaw, Daria J., Owens, Beverly A., Pacifici, Camilla, Page, James Christophe, Paranilam, James G., Park, Sang, Parrish, Keith A., Paschal, Laura, Patapis, Polychronis, Patel, Jignasha, Patrick, Keith, Pattishall Jr., Robert A., Paul, Douglas William, Paul, Shirley J., Pauly, Tyler Andrew, Pavlovsky, Cheryl M., Peña-Guerrero, Maria, Pedder, Andrew H., Peek, Matthew Weldon, Pelham, Patricia A., Penanen, Konstantin, Perriello, Beth A., Perrin, Marshall D., Perrine, Richard F., Perrygo, Chuck, Peslier, Muriel, Petach, Michael, Peterson, Karla A., Pfarr, Tom, Pierson, James M., Pietraszkiewicz, Martin, Pilchen, Guy, Pipher, Judy L., Pirzkal, Norbert, Pitman, Joseph T., Player, Danielle M., Plesha, Rachel, Plitzke, Anja, Pohner, John A., Poletis, Karyn Konstantin, Pollizzi, Joseph A., Polster, Ethan, Pontius, James T., Pontoppidan, Klaus, Porges, Susana C., Potter, Gregg D., Prescott, Stephen, Proffitt, Charles R., Pueyo, Laurent, Neira, Irma Aracely Quispe, Radich, Armando, Rager, Reiko T., Rameau, Julien, Ramey, Deborah D., Alarcon, Rafael Ramos, Rampini, Riccardo, Rapp, Robert, Rashford, Robert A., Rauscher, Bernard J., Ravindranath, Swara, Rawle, Timothy, Rawlings, Tynika N., Ray, Tom, Regan, Michael W., Rehm, Brian, Rehm, Kenneth D., Reid, Neill, Reis, Carl A., Renk, Florian, Reoch, Tom B., Ressler, Michael, Rest, Armin W., Reynolds, Paul J., Richon, Joel G., Richon, Karen V., Ridgaway, Michael, Riedel, Adric Richard, Rieke, George H., Rieke, Marcia, Rifelli, Richard E., Rigby, Jane R., Riggs, Catherine S., Ringel, Nancy J., Ritchie, Christine E., Rix, Hans-Walter, Robberto, Massimo, Robinson, Michael S., Robinson, Orion, Rock, Frank W., Rodriguez, David R., del Pino, Bruno Rodríguez, Roellig, Thomas, Rohrbach, Scott O., Roman, Anthony J., Romelfanger, Frederick J., Romo Jr., Felipe P., Rosales, Jose J., Rose, Perry, Roteliuk, Anthony F., Roth, Marc N., Rothwell, Braden Quinn, Rouzaud, Sylvain, Rowe, Jason, Rowlands, Neil, Roy, Arpita, Royer, Pierre, Rui, Chunlei, Rumler, Peter, Rumpl, William, Russ, Melissa L., Ryan, Michael B., Ryan, Richard M., Saad, Karl, Sabata, Modhumita, Sabatino, Rick, Sabbi, Elena, Sabelhaus, Phillip A., Sabia, Stephen, Sahu, Kailash C., Saif, Babak N., Salvignol, Jean-Christophe, Samara-Ratna, Piyal, Samuelson, Bridget S., Sanders, Felicia A., Sappington, Bradley, Sargent, B. A., Sauer, Arne, Savadkin, Bruce J., Sawicki, Marcin, Schappell, Tina M., Scheffer, Caroline, Scheithauer, Silvia, Scherer, Ron, Schiff, Conrad, Schlawin, Everett, Schmeitzky, Olivier, Schmitz, Tyler S., Schmude, Donald J., Schneider, Analyn, Schreiber, Jürgen, Schroeven-Deceuninck, Hilde, Schultz, John J., Schwab, Ryan, Schwartz, Curtis H., Scoccimarro, Dario, Scott, John F., Scott, Michelle B., Seaton, Bonita L., Seely, Bruce S., Seery, Bernard, Seidleck, Mark, Sembach, Kenneth, Shanahan, Clare Elizabeth, Shaughnessy, Bryan, Shaw, Richard A., Shay, Christopher Michael, Sheehan, Even, Sheth, Kartik, Shih, Hsin-Yi, Shivaei, Irene, Siegel, Noah, Sienkiewicz, Matthew G., Simmons, Debra D., Simon, Bernard P., Sirianni, Marco, Sivaramakrishnan, Anand, Slade, Jeffrey E., Sloan, G. C., Slocum, Christine E., Slowinski, Steven E., Smith, Corbett T., Smith, Eric P., Smith, Erin C., Smith, Koby, Smith, Robert, Smith, Stephanie J., Smolik, John L., Soderblom, David R., Sohn, Sangmo Tony, Sokol, Jeff, Sonneborn, George, Sontag, Christopher D., Sooy, Peter R., Soummer, Remi, Southwood, Dana M., Spain, Kay, Sparmo, Joseph, Speer, David T., Spencer, Richard, Sprofera, Joseph D., Stallcup, Scott S., Stanley, Marcia K., Stansberry, John A., Stark, Christopher C., Starr, Carl W., Stassi, Diane Y., Steck, Jane A., Steeley, Christine D., Stephens, Matthew A., Stephenson, Ralph J., Stewart, Alphonso C., Stiavelli, Massimo, Stockman Jr., Hervey, Strada, Paolo, Straughn, Amber N., Streetman, Scott, Strickland, David Kendal, Strobele, Jingping F., Stuhlinger, Martin, Stys, Jeffrey Edward, Such, Miguel, Sukhatme, Kalyani, Sullivan, Joseph F., Sullivan, Pamela C., Sumner, Sandra M., Sun, Fengwu, Sunnquist, Benjamin Dale, Swade, Daryl Allen, Swam, Michael S., Swenton, Diane F., Swoish, Robby A., Litten, Oi In Tam, Tamas, Laszlo, Tao, Andrew, Taylor, David K., Taylor, Joanna M., Plate, Maurice te, Van Tea, Mason, Teague, Kelly K., Telfer, Randal C., Temim, Tea, Texter, Scott C., Thatte, Deepashri G., Thompson, Christopher Lee, Thompson, Linda M., Thomson, Shaun R., Thronson, Harley, Tierney, C. M., Tikkanen, Tuomo, Tinnin, Lee, Tippet, William Thomas, Todd, Connor William, Tran, Hien D., Trauger, John, Trejo, Edwin Gregorio, Truong, Justin Hoang Vinh, Tsukamoto, Christine L., Tufail, Yasir, Tumlinson, Jason, Tustain, Samuel, Tyra, Harrison, Ubeda, Leonardo, Underwood, Kelli, Uzzo, Michael A., Vaclavik, Steven, Valenduc, Frida, Valenti, Jeff A., Van Campen, Julie, van de Wetering, Inge, Van Der Marel, Roeland P., van Haarlem, Remy, Vandenbussche, Bart, Vanterpool, Dona D., Vernoy, Michael R., Costas, Maria Begoña Vila, Volk, Kevin, Voorzaat, Piet, Voyton, Mark F., Vydra, Ekaterina, Waddy, Darryl J., Waelkens, Christoffel, Wahlgren, Glenn Michael, Walker Jr., Frederick E., Wander, Michel, Warfield, Christine K., Warner, Gerald, Wasiak, Francis C., Wasiak, Matthew F., Wehner, James, Weiler, Kevin R., Weilert, Mark, Weiss, Stanley B., Wells, Martyn, Welty, Alan D., Wheate, Lauren, Wheeler, Thomas P., White, Christy L., Whitehouse, Paul, Whiteleather, Jennifer Margaret, Whitman, William Russell, Williams, Christina C., Willmer, Christopher N. A., Willott, Chris J., Willoughby, Scott P., Wilson, Andrew, Wilson, Debra, Wilson, Donna V., Windhorst, Rogier, Wislowski, Emily Christine, Wolfe, David J., Wolfe, Michael A., Wolff, Schuyler, Wondel, Amancio, Woo, Cindy, Woods, Robert T., Worden, Elaine, Workman, William, Wright, Gillian S., Wu, Carl, Wu, Chi-Rai, Wun, Dakin D., Wymer, Kristen B., Yadetie, Thomas, Yan, Isabelle C., Yang, Keith C., Yates, Kayla L., Yeager, Christopher R., Yerger, Ethan John, Young, Erick T., Young, Gary, Yu, Gene, Yu, Susan, Zak, Dean S., Zeidler, Peter, Zepp, Robert, Zhou, Julia, Zincke, Christian A., Zonak, Stephanie, and Zondag, Elisabeth
Subjects: Astrophysics - Instrumentation and Methods for Astrophysics
Abstract: Twenty-six years ago a small committee report, building on earlier studies, expounded a compelling and poetic vision for the future of astronomy, calling for an infrared-optimized space telescope with an aperture of at least $4m$. With the support of their governments in the US, Europe, and Canada, 20,000 people realized that vision as the $6.5m$ James Webb Space Telescope. A generation of astronomers will celebrate their accomplishments for the life of the mission, potentially as long as 20 years, and beyond. This report and the scientific discoveries that follow are extended thank-you notes to the 20,000 team members. The telescope is working perfectly, with much better image quality than expected. In this and accompanying papers, we give a brief history, describe the observatory, outline its objectives and current observing program, and discuss the inventions and people who made it possible. We cite detailed reports on the design and the measured performance on orbit., Comment: Accepted by PASP for the special issue on The James Webb Space Telescope Overview, 29 pages, 4 figures
Published: 2023
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11. High-Resolution Spectra of Supernova Remnants in M83

Author: Winkler, P. Frank, Long, Knox S., Blair, William P., and Points, Sean D.
Subjects: Astrophysics - Astrophysics of Galaxies, Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Solar and Stellar Astrophysics
Abstract: In order to better characterize the rich supernova remnant (SNR) population of M83 (NGC 5236), we have obtained high-resolution (about 85 km/s) spectra of 119 of the SNRs and SNR candidates in M83 with Gemini/GMOS, as well as new spectra of the young SNRs B12-174a and SN1957D. Most of the SNRs and SNR candidates have [S II]:H{\alpha} ratios that exceed 0.4. Combining these results with earlier studies we have carried out with MUSE and at lower spectroscopic resolution with GMOS, we have confirmed a total of 238 emission nebulae to be SNRs on the basis of their [S II]:H{\alpha} ratios, about half of which have emission lines that show velocity broadening greater than 100 km/s, providing a kinematic confirmation that they are SNRs and not H II regions. Looking at the entire sample, we find a strong correlation between velocity widths and the line ratios of [O I]{\lambda}6300:H{\alpha}, [N II]{\lambda}6584:H{\alpha} and [S II]{\lambda}{\lambda}6716,6731:H{\alpha}. The density-sensitive [S II]{\lambda}6716:{\lambda}6731 line ratio is strongly correlated with SNR diameter, but not with the velocity width. We discuss these results in the context of previously published shock models., Comment: 39 pages, including 9 figures (some with multiple sub-figures) and 6 tables
Published: 2022
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12. Stellar feedback in M83 as observed with MUSE -- II. Analysis of the HII region population: ionisation budget and pre-SN feedback

Author: Della Bruna, Lorenza, Adamo, Angela, McLeod, Anna F., Smith, Linda J., Savard, Gabriel, Robert, Carmelle, Sun, Jiayi, Amram, Philippe, Bik, Arjan, Blair, William P., Long, Knox S., Renaud, Florent, Walterbos, Rene, and Usher, Christopher
Subjects: Astrophysics - Astrophysics of Galaxies
Abstract: We study pre-supernova feedback in a sample of $\sim$ 4700 HII regions in the nearby spiral galaxy M83, identified on their H$\alpha$ emission. We pectroscopically identify Wolf-Rayet (WR) stars populating the star-forming regions. For each HII region, we compute the pressure of ionised gas ($P_{\rm ion}$) and the direct radiation pressure ($P_{\rm dir}$) acting in the region, and investigate how they vary with galactocentric distance, with the physical properties of the region, and with the pressure of the galactic environment ($P_\mathrm{DE}$). For a subset of $\sim$ 500 regions, we also investigate the link between the pressure terms and the properties of the cluster population (age, mass, and LyC flux). We find that $P_{\rm ion}$ dominates over $P_{\rm dir}$ by at least a factor of 10 on average over the disk. Both pressure terms are strongly enhanced and become almost comparable in the central starburst region. In the disk ($R \geq 0.15~R_e$), we observe that $P_{\rm dir}$ stays approximately constant with galactocentric distance. $P_{\rm dir}$ is positively correlated with an increase in radiation field strength (linked to the negative metallicity gradient in the galaxy), while it decreases in low extinction regions. $P_{\rm ion}$ decreases constantly for increasing galactocentric distances. In general, we observe that HII regions near the center are underpressured with respect to their surroundings, whereas regions in the disk are overpressured and hence expanding. We find that regions hosting younger clusters or having more mass in young star clusters have a higher internal pressure, indicating that clustered star formation is likely playing a dominant role in setting the pressure. Finally, we estimate that only 13 % of HII regions hosting young clusters and WR stars have $f_{\rm esc} \geq 0$.[Abridged], Comment: Accepted for publication in A&A
Published: 2022
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13. Far-ultraviolet investigation into the galactic globular cluster M30 (NGC 7099): II. Potential X-ray counterparts and variable sources

Author: Mansfield, Santana, Dieball, Andrea, Kroupa, Pavel, Knigge, Christian, Zurek, David R., Shara, Michael, and Long, Knox S.
Subjects: Astrophysics - Solar and Stellar Astrophysics, Astrophysics - Astrophysics of Galaxies
Abstract: We present a far-ultraviolet (FUV) study of the globular cluster M30 (NGC 7099). The images were obtained using the Advanced Camera for Surveys (ACS/SBC, F150LP, FUV) and the Wide Field Planetary Camera 2 (WFPC2, F300W, UV) on board the Hubble Space Telescope (HST). We compare the catalogue of FUV objects to ten known X-ray sources and find six confident matches of two cataclysmic variables (CVs), one RS CVn, one red giant with strong FUV emission and two sources only detected in the FUV. We also searched for variable sources in our dataset and found a total of seven blue stragglers (BSs), four horizontal branch (HB) stars, five red giant branch stars, 28 main sequence stars and four gap objects that demonstrated variability. One BS star is a known W-UMa contact binary, one of the gap objects is a known CV identified in this work to be a dwarf nova, and the three other gap sources are weak variables. The periods and positions of two of the variable HB stars match them to two previously known RR Lyrae variables of types RRab and RRc., Comment: 13 pages, 12 figures, accepted for publication to MNRAS
Published: 2022
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14. Supernova Remnants in M83 as Observed with MUSE

Author: Long, Knox S., Blair, William P., Winkler, P. Frank, Della Bruna, Lorenza, Adamo, Angela, McLeod, Anna F., and Amram, Phillippe
Subjects: Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Astrophysics of Galaxies
Abstract: Here we describe a new study of the SNRs and SNR candidates in nearby face-on spiral galaxy M83, based primarily on MUSE integral field spectroscopy. Our revised catalog of SNR candidates in M83 has 366 objects, 81 of which are reported here for the first time. Of these, 229 lie within the MUSE observation region, 160 of which have spectra with [SII]:Halpha ratios exceeding 0.4, the value generally accepted as confirmation that an emission nebula is shock-heated. Combined with 51 SNR candidates outside the MUSE region with high [SII]:Halpha ratios, there are 211 spectroscopically-confirmed SNRs in M83, the largest number of confirmed SNRs in any external galaxy. MUSE's combination of relatively high spectral resolution and broad wavelength coverage has allowed us to explore two other properties of SNRs that could serve as the basis of future SNR searches. Specifically, most of the objects identified as SNRs on the basis of [SII]:Halpha ratios exhibit more velocity broadening and lower ratios of [SIII]:[SII] emission than HII regions. A search for nebulae with the very broad emission lines expected from young, rapidly expanding remnants revealed none, except for the previously identified B12-174a. The SNRs identified in M83 are, with few exceptions, middle-aged ISM-dominated ones. Smaller diameter candidates show a larger range of velocity broadening and a larger range of gas densities than the larger diameter objects, as expected if the SNRs expanding into denser gas brighten and then fade from view at smaller diameters than those expanding into a more tenuous ISM, Comment: 28 page, including 14 figures and 4 tables; accepted for publication in ApJ
Published: 2022
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15. Far-ultraviolet investigation into the galactic globular cluster M30 (NGC 7099): I. Photometry and radial distributions

Author: Mansfield, Santana, Dieball, Andrea, Kroupa, Pavel, Knigge, Christian, Zurek, David R., Shara, Michael, and Long, Knox S.
Subjects: Astrophysics - Solar and Stellar Astrophysics, Astrophysics - Astrophysics of Galaxies
Abstract: We present a far-ultraviolet (FUV) study of the globular cluster M30 (NGC 7099). The images were obtained using the Advanced Camera for Surveys (ACS/SBC, F150LP, FUV) and the Wide Field Planetary Camera 2 (WFPC2, F300W, UV) which were both on board the Hubble Space Telescope (HST). The FUV-UV colour-magnitude diagram (CMD) shows a main sequence (MS) turnoff at FUV $\approx$ 22 mag and FUV-UV $\approx$ 3 mag. The MS extends 4 mag below the turnoff, and a prominent horizontal branch (HB) and blue straggler (BS) sequence can be seen. A total of 1218 MS stars, 185 red giant branch stars, 47 BS stars and 41 HB stars are identified, along with 78 sources blueward of the MS which consist of white dwarfs (WDs) and objects in the gap between the WDs and the MS that include potential cataclysmic variable (CV) candidates. The radial distribution of the BS population is concentrated towards the cluster centre, indicating that mass segregation has occurred. The blue and red sub-populations of the double BS sequence appear mixed in the ultraviolet CMD, and no significant central concentration of CV candidates is seen in this cluster., Comment: 11 pages, 7 figures. Accepted for publication in MNRAS
Published: 2022
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16. Locating the CSM Emission within the Type Ia Supernova Remnant N103B

Author: Guest, Benson T., Blair, William P., Borkowski, Kazimierz J., Ghavamian, Parviz, Hendrick, Sean P., Long, Knox S., Petre, Robert, Raymond, John C., Rest, Armin, Sankrit, Ravi, Seitenzahl, Ivo R., and Williams, Brian J.
Subjects: Astrophysics - High Energy Astrophysical Phenomena
Abstract: We present results from deep Chandra observations of the young Type Ia supernova remnant (SNR) 0509-68.7, also known as N103B, located in the Large Magellanic cloud (LMC). The remnant displays an asymmetry in brightness, with the western hemisphere appearing significantly brighter than the eastern half. Previous multi-wavelength observations have attributed the difference to a density gradient and suggested circumstellar material origins, drawing similarities to Kepler's SNR. We apply a clustering technique combined with traditional imaging analysis to spatially locate various emission components within the remnant. We find that O and Mg emission is strongest along the blast wave, and coincides with Spitzer observations of dust emission and optical emission from the non-radiative shocks. The abundances of O and Mg in these regions are enhanced relative to the average LMC abundances and appear as a distinct spatial distribution compared to the ejecta products, supporting the circumstellar medium (CSM) interpretation. We also find that the spatial distribution of Cr is identical to that of Fe in the interior of the remnant, and does not coincide at all with the O and Mg emission., Comment: 23 pages, 17 Figures. Accepted for publication in ApJ
Published: 2022
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17. Optical line spectra of tidal disruption events from reprocessing in optically thick outflows

Author: Parkinson, Edward J., Knigge, Christian, Matthews, James H., Long, Knox S., Higginbottom, Nick, Sim, Stuart A., and Mangham, Samuel W.
Subjects: Astrophysics - High Energy Astrophysical Phenomena
Abstract: A significant number of tidal disruption events (TDEs) radiate primarily at optical and ultraviolet (UV) wavelengths, with only weak soft X-ray components. One model for this optical excess proposes that thermal X-ray emission from a compact accretion disc is reprocessed to longer wavelengths by an optically thick envelope. Here, we explore this reprocessing scenario in the context of an optically thick accretion disc wind. Using state-of-the-art Monte Carlo radiative transfer and ionization software, we produce synthetic UV and optical spectra for wind and disc-hosting TDEs. Our models are inspired by observations, spanning a realistic range of accretion rates and wind kinematics. We find that such outflows can efficiently reprocess the disc emission and produce the broad Balmer and helium recombination features commonly seen in TDEs and exhibit asymmetric red wings. Moreover, the characteristic colour temperature of the reprocessed spectral energy distribution (SED) is much lower than that of the accretion disc. We show explicitly how changes in black hole mass, accretion rate and wind properties affect the observed broadband SED and line spectrum. In general, slower, denser winds tend to reprocess more radiation and produce stronger Balmer emission. Most of the outflows we consider are too highly ionized to produce UV absorption features, but this is sensitive to the input SED. For example, truncating the inner disc at just 4 $R_{ISCO}$ lowers the wind ionization state sufficiently to produce UV absorption features for sight lines looking into the wind, Comment: Accepted to MNRAS. 19 pages, 11 figures
Published: 2022
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18. Supernova Remnants in the Irregular Galaxy NGC 4449

Author: Winkler, P. Frank, primary, Long, Knox S., additional, and Blair, William P., additional
Published: 2023
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19. State-of-the-art simulations of line-driven accretion disc winds: realistic radiation hydrodynamics leads to weaker outflows

Author: Higginbottom, Nick, primary, Scepi, Nicolas, additional, Knigge, Christian, additional, Long, Knox S, additional, Matthews, James H, additional, and Sim, Stuart A, additional
Published: 2023
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20. A disc wind model for blueshifts in quasar broad emission lines

Author: Matthews, James H, primary, Strong-Wright, Jago, additional, Knigge, Christian, additional, Hewett, Paul, additional, Temple, Matthew J, additional, Long, Knox S, additional, Rankine, Amy L, additional, Stepney, Matthew, additional, Banerji, Manda, additional, and Richards, Gordon T, additional
Published: 2023
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21. The James Webb Space Telescope Mission

Author: Gardner, Jonathan P., primary, Mather, John C., additional, Abbott, Randy, additional, Abell, James S., additional, Abernathy, Mark, additional, Abney, Faith E., additional, Abraham, John G., additional, Abraham, Roberto, additional, Abul-Huda, Yasin M., additional, Acton, Scott, additional, Adams, Cynthia K., additional, Adams, Evan, additional, Adler, David S., additional, Adriaensen, Maarten, additional, Aguilar, Jonathan Albert, additional, Ahmed, Mansoor, additional, Ahmed, Nasif S., additional, Ahmed, Tanjira, additional, Albat, Rüdeger, additional, Albert, Loïc, additional, Alberts, Stacey, additional, Aldridge, David, additional, Allen, Mary Marsha, additional, Allen, Shaune S., additional, Altenburg, Martin, additional, Altunc, Serhat, additional, Alvarez, Jose Lorenzo, additional, Álvarez-Márquez, Javier, additional, de Oliveira, Catarina Alves, additional, Ambrose, Leslie L., additional, Anandakrishnan, Satya M., additional, Andersen, Gregory C., additional, Anderson, Harry James, additional, Anderson, Jay, additional, Anderson, Kristen, additional, Anderson, Sara M., additional, Aprea, Julio, additional, Archer, Benita J., additional, Arenberg, Jonathan W., additional, Argyriou, Ioannis, additional, Arribas, Santiago, additional, Artigau, Étienne, additional, Arvai, Amanda Rose, additional, Atcheson, Paul, additional, Atkinson, Charles B., additional, Averbukh, Jesse, additional, Aymergen, Cagatay, additional, Bacinski, John J., additional, Baggett, Wayne E., additional, Bagnasco, Giorgio, additional, Baker, Lynn L., additional, Balzano, Vicki Ann, additional, Banks, Kimberly A., additional, Baran, David A., additional, Barker, Elizabeth A., additional, Barrett, Larry K., additional, Barringer, Bruce O., additional, Barto, Allison, additional, Bast, William, additional, Baudoz, Pierre, additional, Baum, Stefi, additional, Beatty, Thomas G., additional, Beaulieu, Mathilde, additional, Bechtold, Kathryn, additional, Beck, Tracy, additional, Beddard, Megan M., additional, Beichman, Charles, additional, Bellagama, Larry, additional, Bely, Pierre, additional, Berger, Timothy W., additional, Bergeron, Louis E., additional, Bernier, Antoine-Darveau, additional, Bertch, Maria D., additional, Beskow, Charlotte, additional, Betz, Laura E., additional, Biagetti, Carl P., additional, Birkmann, Stephan, additional, Bjorklund, Kurt F., additional, Blackwood, James D., additional, Blazek, Ronald Paul, additional, Blossfeld, Stephen, additional, Bluth, Marcel, additional, Boccaletti, Anthony, additional, Boegner Jr, Martin E., additional, Bohlin, Ralph C., additional, Boia, John Joseph, additional, Böker, Torsten, additional, Bonaventura, N., additional, Bond, Nicholas A., additional, Bosley, Kari Ann, additional, Boucarut, Rene A., additional, Bouchet, Patrice, additional, Bouwman, Jeroen, additional, Bower, Gary, additional, Bowers, Ariel S., additional, Bowers, Charles W., additional, Boyce, Leslye A., additional, Boyer, Christine T., additional, Boyer, Martha L., additional, Boyer, Michael, additional, Boyer, Robert, additional, Bradley, Larry D., additional, Brady, Gregory R., additional, Brandl, Bernhard R., additional, Brannen, Judith L., additional, Breda, David, additional, Bremmer, Harold G., additional, Brennan, David, additional, Bresnahan, Pamela A., additional, Bright, Stacey N., additional, Broiles, Brian J., additional, Bromenschenkel, Asa, additional, Brooks, Brian H., additional, Brooks, Keira J., additional, Brown, Bob, additional, Brown, Bruce, additional, Brown, Thomas M., additional, Bruce, Barry W., additional, Bryson, Jonathan G., additional, Bujanda, Edwin D., additional, Bullock, Blake M., additional, Bunker, A. J., additional, Bureo, Rafael, additional, Burt, Irving J., additional, Bush, James Aaron, additional, Bushouse, Howard A., additional, Bussman, Marie C., additional, Cabaud, Olivier, additional, Cale, Steven, additional, Calhoon, Charles D., additional, Calvani, Humberto, additional, Canipe, Alicia M., additional, Caputo, Francis M., additional, Cara, Mihai, additional, Carey, Larkin, additional, Case, Michael Eli, additional, Cesari, Thaddeus, additional, Cetorelli, Lee D., additional, Chance, Don R., additional, Chandler, Lynn, additional, Chaney, Dave, additional, Chapman, George N., additional, Charlot, S., additional, Chayer, Pierre, additional, Cheezum, Jeffrey I., additional, Chen, Bin, additional, Chen, Christine H., additional, Cherinka, Brian, additional, Chichester, Sarah C., additional, Chilton, Zachary S., additional, Chittiraibalan, Dharini, additional, Clampin, Mark, additional, Clark, Charles R., additional, Clark, Kerry W., additional, Clark, Stephanie M., additional, Claybrooks, Edward E., additional, Cleveland, Keith A., additional, Cohen, Andrew L., additional, Cohen, Lester M., additional, Colón, Knicole D., additional, Coleman, Benee L., additional, Colina, Luis, additional, Comber, Brian J., additional, Comeau, Thomas M., additional, Comer, Thomas, additional, Reis, Alain Conde, additional, Connolly, Dennis C., additional, Conroy, Kyle E., additional, Contos, Adam R., additional, Contreras, James, additional, Cook, Neil J., additional, Cooper, James L., additional, Cooper, Rachel Aviva, additional, Correia, Michael F., additional, Correnti, Matteo, additional, Cossou, Christophe, additional, Costanza, Brian F., additional, Coulais, Alain, additional, Cox, Colin R., additional, Coyle, Ray T., additional, Cracraft, Misty M., additional, Crew, Keith A., additional, Curtis, Gary J., additional, Cusveller, Bianca, additional, Maciel, Cleyciane Da Costa, additional, Dailey, Christopher T., additional, Daugeron, Frédéric, additional, Davidson, Greg S., additional, Davies, James E., additional, Davis, Katherine Anne, additional, Davis, Michael S., additional, Day, Ratna, additional, de Chambure, Daniel, additional, de Jong, Pauline, additional, De Marchi, Guido, additional, Dean, Bruce H., additional, Decker, John E., additional, Delisa, Amy S., additional, Dell, Lawrence C., additional, Dellagatta, Gail, additional, Dembinska, Franciszka, additional, Demosthenes, Sandor, additional, Dencheva, Nadezhda M., additional, Deneu, Philippe, additional, DePriest, William W., additional, Deschenes, Jeremy, additional, Dethienne, Nathalie, additional, Detre, Örs Hunor, additional, Diaz, Rosa Izela, additional, Dicken, Daniel, additional, DiFelice, Audrey S., additional, Dillman, Matthew, additional, Disharoon, Maureen O., additional, Dixon, William V., additional, Doggett, Jesse B., additional, Dominguez, Keisha L., additional, Donaldson, Thomas S., additional, Doria-Warner, Cristina M., additional, Santos, Tony Dos, additional, Doty, Heather, additional, Douglas, Jr, Robert E., additional, Doyon, René, additional, Dressler, Alan, additional, Driggers, Jennifer, additional, Driggers, Phillip A., additional, Dunn, Jamie L., additional, DuPrie, Kimberly C., additional, Dupuis, Jean, additional, Durning, John, additional, Dutta, Sanghamitra B., additional, Earl, Nicholas M., additional, Eccleston, Paul, additional, Ecobichon, Pascal, additional, Egami, Eiichi, additional, Ehrenwinkler, Ralf, additional, Eisenhamer, Jonathan D., additional, Eisenhower, Michael, additional, Eisenstein, Daniel J., additional, El Hamel, Zaky, additional, Elie, Michelle L., additional, Elliott, James, additional, Elliott, Kyle Wesley, additional, Engesser, Michael, additional, Espinoza, Néstor, additional, Etienne, Odessa, additional, Etxaluze, Mireya, additional, Evans, Leah, additional, Fabreguettes, Luce, additional, Falcolini, Massimo, additional, Falini, Patrick R., additional, Fatig, Curtis, additional, Feeney, Matthew, additional, Feinberg, Lee D., additional, Fels, Raymond, additional, Ferdous, Nazma, additional, Ferguson, Henry C., additional, Ferrarese, Laura, additional, Ferreira, Marie-Héléne, additional, Ferruit, Pierre, additional, Ferry, Malcolm, additional, Filippazzo, Joseph Charles, additional, Firre, Daniel, additional, Fix, Mees, additional, Flagey, Nicolas, additional, Flanagan, Kathryn A., additional, Fleming, Scott W., additional, Florian, Michael, additional, Flynn, James R., additional, Foiadelli, Luca, additional, Fontaine, Mark R., additional, Fontanella, Erin Marie, additional, Forshay, Peter Randolph, additional, Fortner, Elizabeth A., additional, Fox, Ori D., additional, Framarini, Alexandro P., additional, Francisco, John I., additional, Franck, Randy, additional, Franx, Marijn, additional, Franz, David E., additional, Friedman, Scott D., additional, Friend, Katheryn E., additional, Frost, James R., additional, Fu, Henry, additional, Fullerton, Alexander W., additional, Gaillard, Lionel, additional, Galkin, Sergey, additional, Gallagher, Ben, additional, Galyer, Anthony D., additional, García Marín, Macarena, additional, Gardner, Lisa E., additional, Garland, Dennis, additional, Garrett, Bruce Albert, additional, Gasman, Danny, additional, Gáspár, András, additional, Gastaud, René, additional, Gaudreau, Daniel, additional, Gauthier, Peter Timothy, additional, Geers, Vincent, additional, Geithner, Paul H., additional, Gennaro, Mario, additional, Gerber, John, additional, Gereau, John C., additional, Giampaoli, Robert, additional, Giardino, Giovanna, additional, Gibbons, Paul C., additional, Gilbert, Karoline, additional, Gilman, Larry, additional, Girard, Julien H., additional, Giuliano, Mark E., additional, Gkountis, Konstantinos, additional, Glasse, Alistair, additional, Glassmire, Kirk Zachary, additional, Glauser, Adrian Michael, additional, Glazer, Stuart D., additional, Goldberg, Joshua, additional, Golimowski, David A., additional, Gonzaga, Shireen P., additional, Gordon, Karl D., additional, Gordon, Shawn J., additional, Goudfrooij, Paul, additional, Gough, Michael J., additional, Graham, Adrian J., additional, Grau, Christopher M., additional, Green, Joel David, additional, Greene, Gretchen R., additional, Greene, Thomas P., additional, Greenfield, Perry E., additional, Greenhouse, Matthew A., additional, Greve, Thomas R., additional, Greville, Edgar M., additional, Grimaldi, Stefano, additional, Groe, Frank E., additional, Groebner, Andrew, additional, Grumm, David M., additional, Grundy, Timothy, additional, Güdel, Manuel, additional, Guillard, Pierre, additional, Guldalian, John, additional, Gunn, Christopher A., additional, Gurule, Anthony, additional, Gutman, Irvin Meyer, additional, Guy, Paul D., additional, Guyot, Benjamin, additional, Hack, Warren J., additional, Haderlein, Peter, additional, Hagan, James B., additional, Hagedorn, Andria, additional, Hainline, Kevin, additional, Haley, Craig, additional, Hami, Maryam, additional, Hamilton, Forrest Clifford, additional, Hammann, Jeffrey, additional, Hammel, Heidi B., additional, Hanley, Christopher J., additional, Hansen, Carl August, additional, Hardy, Bruce, additional, Harnisch, Bernd, additional, Harr, Michael Hunter, additional, Harris, Pamela, additional, Hart, Jessica Ann, additional, Hartig, George F., additional, Hasan, Hashima, additional, Hashim, Kathleen Marie, additional, Hashimoto, Ryan, additional, Haskins, Sujee J., additional, Hawkins, Robert Edward, additional, Hayden, Brian, additional, Hayden, William L., additional, Healy, Mike, additional, Hecht, Karen, additional, Heeg, Vince J., additional, Hejal, Reem, additional, Helm, Kristopher A., additional, Hengemihle, Nicholas J., additional, Henning, Thomas, additional, Henry, Alaina, additional, Henry, Ronald L., additional, Henshaw, Katherine, additional, Hernandez, Scarlin, additional, Herrington, Donald C., additional, Heske, Astrid, additional, Hesman, Brigette Emily, additional, Hickey, David L., additional, Hilbert, Bryan N., additional, Hines, Dean C., additional, Hinz, Michael R., additional, Hirsch, Michael, additional, Hitcho, Robert S., additional, Hodapp, Klaus, additional, Hodge, Philip E., additional, Hoffman, Melissa, additional, Holfeltz, Sherie T., additional, Holler, Bryan Jason, additional, Hoppa, Jennifer Rose, additional, Horner, Scott, additional, Howard, Joseph M., additional, Howard, Richard J., additional, Huber, Jean M., additional, Hunkeler, Joseph S., additional, Hunter, Alexander, additional, Hunter, David Gavin, additional, Hurd, Spencer W., additional, Hurst, Brendan J., additional, Hutchings, John B., additional, Hylan, Jason E., additional, Ignat, Luminita Ilinca, additional, Illingworth, Garth, additional, Irish, Sandra M., additional, Isaacs III, John C., additional, Jackson Jr, Wallace C., additional, Jaffe, Daniel T., additional, Jahic, Jasmin, additional, Jahromi, Amir, additional, Jakobsen, Peter, additional, James, Bryan, additional, James, John C., additional, James, LeAndrea Rae, additional, Jamieson, William Brian, additional, Jandra, Raymond D., additional, Jayawardhana, Ray, additional, Jedrzejewski, Robert, additional, Jeffers, Basil S., additional, Jensen, Peter, additional, Joanne, Egges, additional, Johns, Alan T., additional, Johnson, Carl A., additional, Johnson, Eric L., additional, Johnson, Patricia, additional, Johnson, Phillip Stephen, additional, Johnson, Thomas K., additional, Johnson, Timothy W., additional, Johnstone, Doug, additional, Jollet, Delphine, additional, Jones, Danny P., additional, Jones, Gregory S., additional, Jones, Olivia C., additional, Jones, Ronald A., additional, Jones, Vicki, additional, Jordan, Ian J., additional, Jordan, Margaret E., additional, Jue, Reginald, additional, Jurkowski, Mark H., additional, Justis, Grant, additional, Justtanont, Kay, additional, Kaleida, Catherine C., additional, Kalirai, Jason S., additional, Kalmanson, Phillip Cabrales, additional, Kaltenegger, Lisa, additional, Kammerer, Jens, additional, Kan, Samuel K., additional, Kanarek, Graham Childs, additional, Kao, Shaw-Hong, additional, Karakla, Diane M., additional, Karl, Hermann, additional, Kassin, Susan A., additional, Kauffman, David D., additional, Kavanagh, Patrick, additional, Kelley, Leigh L., additional, Kelly, Douglas M., additional, Kendrew, Sarah, additional, Kennedy, Herbert V., additional, Kenny, Deborah A., additional, Keski-Kuha, Ritva A., additional, Keyes, Charles D., additional, Khan, Ali, additional, Kidwell, Richard C., additional, Kimble, Randy A., additional, King, James S., additional, King, Richard C., additional, Kinzel, Wayne M., additional, Kirk, Jeffrey R., additional, Kirkpatrick, Marc E., additional, Klaassen, Pamela, additional, Klingemann, Lana, additional, Klintworth, Paul U., additional, Knapp, Bryan Adam, additional, Knight, Scott, additional, Knollenberg, Perry J., additional, Knutsen, Daniel Mark, additional, Koehler, Robert, additional, Koekemoer, Anton M., additional, Kofler, Earl T., additional, Kontson, Vicki L., additional, Kovacs, Aiden Rose, additional, Kozhurina-Platais, Vera, additional, Krause, Oliver, additional, Kriss, Gerard A., additional, Krist, John, additional, Kristoffersen, Monica R., additional, Krogel, Claudia, additional, Krueger, Anthony P., additional, Kulp, Bernard A., additional, Kumari, Nimisha, additional, Kwan, Sandy W., additional, Kyprianou, Mark, additional, Labador, Aurora Gadiano, additional, Labiano, Álvaro, additional, Lafrenière, David, additional, Lagage, Pierre-Olivier, additional, Laidler, Victoria G., additional, Laine, Benoit, additional, Laird, Simon, additional, Lajoie, Charles-Philippe, additional, Lallo, Matthew D., additional, Lam, May Yen, additional, LaMassa, Stephanie Marie, additional, Lambros, Scott D., additional, Lampenfield, Richard Joseph, additional, Lander, Matthew Ed, additional, Langston, James Hutton, additional, Larson, Kirsten, additional, Larson, Melora, additional, LaVerghetta, Robert Joseph, additional, Law, David R., additional, Lawrence, Jon F., additional, Lee, David W., additional, Lee, Janice, additional, Lee, Yat-Ning Paul, additional, Leisenring, Jarron, additional, Leveille, Michael Dunlap, additional, Levenson, Nancy A., additional, Levi, Joshua S., additional, Levine, Marie B., additional, Lewis, Dan, additional, Lewis, Jake, additional, Lewis, Nikole, additional, Libralato, Mattia, additional, Lidon, Norbert, additional, Liebrecht, Paula Louisa, additional, Lightsey, Paul, additional, Lilly, Simon, additional, Lim, Frederick C., additional, Lim, Pey Lian, additional, Ling, Sai-Kwong, additional, Link, Lisa J., additional, Link, Miranda Nicole, additional, Lipinski, Jamie L., additional, Liu, XiaoLi, additional, Lo, Amy S., additional, Lobmeyer, Lynette, additional, Logue, Ryan M., additional, Long, Chris A., additional, Long, Douglas R., additional, Long, Ilana D., additional, Long, Knox S., additional, López-Caniego, Marcos, additional, Lotz, Jennifer M., additional, Love-Pruitt, Jennifer M., additional, Lubskiy, Michael, additional, Luers, Edward B., additional, Luetgens, Robert A., additional, Luevano, Annetta J., additional, G. Flores Lui, Sarah Marie, additional, Lund III, James M., additional, Lundquist, Ray A., additional, Lunine, Jonathan, additional, Lützgendorf, Nora, additional, Lynch, Richard J., additional, MacDonald, Alex J., additional, MacDonald, Kenneth, additional, Macias, Matthew J., additional, Macklis, Keith I., additional, Maghami, Peiman, additional, Maharaja, Rishabh Y., additional, Maiolino, Roberto, additional, Makrygiannis, Konstantinos G., additional, Malla, Sunita Giri, additional, Malumuth, Eliot M., additional, Manjavacas, Elena, additional, Marini, Andrea, additional, Marrione, Amanda, additional, Marston, Anthony, additional, Martel, André R, additional, Martin, Didier, additional, Martin, Peter G., additional, Martinez, Kristin L., additional, Maschmann, Marc, additional, Masci, Gregory L., additional, Masetti, Margaret E., additional, Maszkiewicz, Michael, additional, Matthews, Gary, additional, Matuskey, Jacob E., additional, McBrayer, Glen A., additional, McCarthy, Donald W., additional, McCaughrean, Mark J., additional, McClare, Leslie A., additional, McClare, Michael D., additional, McCloskey, John C., additional, McClurg, Taylore D., additional, McCoy, Martin, additional, McElwain, Michael W., additional, McGregor, Roy D., additional, McGuffey, Douglas B., additional, McKay, Andrew G., additional, McKenzie, William K., additional, McLean, Brian, additional, McMaster, Matthew, additional, McNeil, Warren, additional, De Meester, Wim, additional, Mehalick, Kimberly L., additional, Meixner, Margaret, additional, Meléndez, Marcio, additional, Menzel, Michael P., additional, Menzel, Michael T., additional, Merz, Matthew, additional, Mesterharm, David D., additional, Meyer, Michael R., additional, Meyett, Michele L., additional, Meza, Luis E., additional, Midwinter, Calvin, additional, Milam, Stefanie N., additional, Miller, Jay Todd, additional, Miller, William C., additional, Miskey, Cherie L., additional, Misselt, Karl, additional, Mitchell, Eileen P., additional, Mohan, Martin, additional, Montoya, Emily E., additional, Moran, Michael J., additional, Morishita, Takahiro, additional, Moro-Martín, Amaya, additional, Morrison, Debra L., additional, Morrison, Jane, additional, Morse, Ernie C., additional, Moschos, Michael, additional, Moseley, S. H., additional, Mosier, Gary E., additional, Mosner, Peter, additional, Mountain, Matt, additional, Muckenthaler, Jason S., additional, Mueller, Donald G., additional, Mueller, Migo, additional, Muhiem, Daniella, additional, Mühlmann, Prisca, additional, Mullally, Susan Elizabeth, additional, Mullen, Stephanie M., additional, Munger, Alan J, additional, Murphy, Jess, additional, Murray, Katherine T., additional, Muzerolle, James C., additional, Mycroft, Matthew, additional, Myers, Andrew, additional, Myers, Carey R., additional, R. Myers, Fred Richard, additional, Myers, Richard, additional, Myrick, Kaila, additional, Nagle, IV, Adrian F., additional, Nayak, Omnarayani, additional, Naylor, Bret, additional, Neff, Susan G., additional, Nelan, Edmund P., additional, Nella, John, additional, Nguyen, Duy Tuong, additional, Nguyen, Michael N., additional, Nickson, Bryony, additional, Nidhiry, John Joseph, additional, Niedner, Malcolm B., additional, Nieto-Santisteban, Maria, additional, Nikolov, Nikolay K., additional, Nishisaka, Mary Ann, additional, Noriega-Crespo, Alberto, additional, Nota, Antonella, additional, O’Mara, Robyn C., additional, Oboryshko, Michael, additional, O’Brien, Marcus B., additional, Ochs, William R., additional, Offenberg, Joel D., additional, Ogle, Patrick Michael, additional, Ohl, Raymond G., additional, Olmsted, Joseph Hamden, additional, Osborne, Shannon Barbara, additional, O’Shaughnessy, Brian Patrick, additional, Östlin, Göran, additional, O’Sullivan, Brian, additional, Otor, O. Justin, additional, Ottens, Richard, additional, Ouellette, Nathalie N.-Q., additional, Outlaw, Daria J., additional, Owens, Beverly A., additional, Pacifici, Camilla, additional, Page, James Christophe, additional, Paranilam, James G., additional, Park, Sang, additional, Parrish, Keith A., additional, Paschal, Laura, additional, Patapis, Polychronis, additional, Patel, Jignasha, additional, Patrick, Keith, additional, Pattishall Jr, Robert A., additional, Paul, Douglas William, additional, Paul, Shirley J., additional, Pauly, Tyler Andrew, additional, Pavlovsky, Cheryl M., additional, Peña-Guerrero, Maria, additional, Pedder, Andrew H., additional, Peek, Matthew Weldon, additional, Pelham, Patricia A., additional, Penanen, Konstantin, additional, Perriello, Beth A., additional, Perrin, Marshall D., additional, Perrine, Richard F., additional, Perrygo, Chuck, additional, Peslier, Muriel, additional, Petach, Michael, additional, Peterson, Karla A., additional, Pfarr, Tom, additional, Pierson, James M., additional, Pietraszkiewicz, Martin, additional, Pilchen, Guy, additional, Pipher, Judy L., additional, Pirzkal, Norbert, additional, Pitman, Joseph T., additional, Player, Danielle M., additional, Plesha, Rachel, additional, Plitzke, Anja, additional, Pohner, John A., additional, Poletis, Karyn Konstantin, additional, Pollizzi, Joseph A., additional, Polster, Ethan, additional, Pontius, James T., additional, Pontoppidan, Klaus, additional, Porges, Susana C., additional, Potter, Gregg D., additional, Prescott, Stephen, additional, Proffitt, Charles R., additional, Pueyo, Laurent, additional, Quispe Neira, Irma Aracely, additional, Radich, Armando, additional, Rager, Reiko T., additional, Rameau, Julien, additional, Ramey, Deborah D., additional, Alarcon, Rafael Ramos, additional, Rampini, Riccardo, additional, Rapp, Robert, additional, Rashford, Robert A., additional, Rauscher, Bernard J., additional, Ravindranath, Swara, additional, Rawle, Timothy, additional, Rawlings, Tynika N., additional, Ray, Tom, additional, Regan, Michael W., additional, Rehm, Brian, additional, Rehm, Kenneth D., additional, Reid, Neill, additional, Reis, Carl A., additional, Renk, Florian, additional, Reoch, Tom B., additional, Ressler, Michael, additional, Rest, Armin W., additional, Reynolds, Paul J., additional, Richon, Joel G., additional, Richon, Karen V., additional, Ridgaway, Michael, additional, Riedel, Adric Richard, additional, Rieke, George H., additional, Rieke, Marcia J., additional, Rifelli, Richard E., additional, Rigby, Jane R., additional, Riggs, Catherine S., additional, Ringel, Nancy J., additional, Ritchie, Christine E., additional, Rix, Hans-Walter, additional, Robberto, Massimo, additional, Robinson, Gregory L., additional, Robinson, Michael S., additional, Robinson, Orion, additional, Rock, Frank W., additional, Rodriguez, David R., additional, del Pino, Bruno Rodríguez, additional, Roellig, Thomas, additional, Rohrbach, Scott O., additional, Roman, Anthony J., additional, Romelfanger, Frederick J., additional, Romo Jr, Felipe P., additional, Rosales, Jose J., additional, Rose, Perry, additional, Roteliuk, Anthony F., additional, Roth, Marc N., additional, Rothwell, Braden Quinn, additional, Rouzaud, Sylvain, additional, Rowe, Jason, additional, Rowlands, Neil, additional, Roy, Arpita, additional, Royer, Pierre, additional, Rui, Chunlei, additional, Rumler, Peter, additional, Rumpl, William, additional, Russ, Melissa L., additional, Ryan, Michael B., additional, Ryan, Richard M., additional, Saad, Karl, additional, Sabata, Modhumita, additional, Sabatino, Rick, additional, Sabbi, Elena, additional, Sabelhaus, Phillip A., additional, Sabia, Stephen, additional, Sahu, Kailash C., additional, Saif, Babak N., additional, Salvignol, Jean-Christophe, additional, Samara-Ratna, Piyal, additional, Samuelson, Bridget S., additional, Sanders, Felicia A., additional, Sappington, Bradley, additional, Sargent, B. A., additional, Sauer, Arne, additional, Savadkin, Bruce J., additional, Sawicki, Marcin, additional, Schappell, Tina M., additional, Scheffer, Caroline, additional, Scheithauer, Silvia, additional, Scherer, Ron, additional, Schiff, Conrad, additional, Schlawin, Everett, additional, Schmeitzky, Olivier, additional, Schmitz, Tyler S., additional, Schmude, Donald J., additional, Schneider, Analyn, additional, Schreiber, Jürgen, additional, Schroeven-Deceuninck, Hilde, additional, Schultz, John J., additional, Schwab, Ryan, additional, Schwartz, Curtis H., additional, Scoccimarro, Dario, additional, Scott, John F., additional, Scott, Michelle B., additional, Seaton, Bonita L., additional, Seely, Bruce S., additional, Seery, Bernard, additional, Seidleck, Mark, additional, Sembach, Kenneth, additional, Shanahan, Clare Elizabeth, additional, Shaughnessy, Bryan, additional, Shaw, Richard A., additional, Shay, Christopher Michael, additional, Sheehan, Even, additional, Sheth, Kartik, additional, Shih, Hsin-Yi, additional, Shivaei, Irene, additional, Siegel, Noah, additional, Sienkiewicz, Matthew G., additional, Simmons, Debra D., additional, Simon, Bernard P., additional, Sirianni, Marco, additional, Sivaramakrishnan, Anand, additional, Slade, Jeffrey E., additional, Sloan, G. C., additional, Slocum, Christine E., additional, Slowinski, Steven E., additional, Smith, Corbett T., additional, Smith, Eric P., additional, Smith, Erin C., additional, Smith, Koby, additional, Smith, Robert, additional, Smith, Stephanie J., additional, Smolik, John L., additional, Soderblom, David R., additional, Sohn, Sangmo Tony, additional, Sokol, Jeff, additional, Sonneborn, George, additional, Sontag, Christopher D., additional, Sooy, Peter R., additional, Soummer, Remi, additional, Southwood, Dana M., additional, Spain, Kay, additional, Sparmo, Joseph, additional, Speer, David T., additional, Spencer, Richard, additional, Sprofera, Joseph D., additional, Stallcup, Scott S., additional, Stanley, Marcia K., additional, Stansberry, John A., additional, Stark, Christopher C., additional, Starr, Carl W., additional, Stassi, Diane Y., additional, Steck, Jane A., additional, Steeley, Christine D., additional, Stephens, Matthew A., additional, Stephenson, Ralph J., additional, Stewart, Alphonso C., additional, Stiavelli, Massimo, additional, Jr, Hervey Stockman, additional, Strada, Paolo, additional, Straughn, Amber N., additional, Streetman, Scott, additional, Strickland, David Kendal, additional, Strobele, Jingping F., additional, Stuhlinger, Martin, additional, Stys, Jeffrey Edward, additional, Such, Miguel, additional, Sukhatme, Kalyani, additional, Sullivan, Joseph F., additional, Sullivan, Pamela C., additional, Sumner, Sandra M., additional, Sun, Fengwu, additional, Sunnquist, Benjamin Dale, additional, Swade, Daryl Allen, additional, Swam, Michael S., additional, Swenton, Diane F., additional, Swoish, Robby A., additional, Tam Litten, Oi In, additional, Tamas, Laszlo, additional, Tao, Andrew, additional, Taylor, David K., additional, Taylor, Joanna M., additional, Plate, Maurice te, additional, Van Tea, Mason, additional, Teague, Kelly K., additional, Telfer, Randal C., additional, Temim, Tea, additional, Texter, Scott C., additional, Thatte, Deepashri G., additional, Thompson, Christopher Lee, additional, Thompson, Linda M., additional, Thomson, Shaun R., additional, Thronson, Harley, additional, Tierney, C. M., additional, Tikkanen, Tuomo, additional, Tinnin, Lee, additional, Tippet, William Thomas, additional, Todd, Connor William, additional, Tran, Hien D., additional, Trauger, John, additional, Trejo, Edwin Gregorio, additional, Vinh Truong, Justin Hoang, additional, Tsukamoto, Christine L., additional, Tufail, Yasir, additional, Tumlinson, Jason, additional, Tustain, Samuel, additional, Tyra, Harrison, additional, Ubeda, Leonardo, additional, Underwood, Kelli, additional, Uzzo, Michael A., additional, Vaclavik, Steven, additional, Valenduc, Frida, additional, Valenti, Jeff A., additional, Van Campen, Julie, additional, van de Wetering, Inge, additional, Van Der Marel, Roeland P., additional, van Haarlem, Remy, additional, Vandenbussche, Bart, additional, van Dishoeck, Ewine F., additional, Vanterpool, Dona D., additional, Vernoy, Michael R., additional, Vila Costas, Maria Begoña, additional, Volk, Kevin, additional, Voorzaat, Piet, additional, Voyton, Mark F., additional, Vydra, Ekaterina, additional, Waddy, Darryl J., additional, Waelkens, Christoffel, additional, Wahlgren, Glenn Michael, additional, Walker Jr, Frederick E., additional, Wander, Michel, additional, Warfield, Christine K., additional, Warner, Gerald, additional, Wasiak, Francis C., additional, Wasiak, Matthew F., additional, Wehner, James, additional, Weiler, Kevin R., additional, Weilert, Mark, additional, Weiss, Stanley B., additional, Wells, Martyn, additional, Welty, Alan D., additional, Wheate, Lauren, additional, Wheeler, Thomas P., additional, White, Christy L., additional, Whitehouse, Paul, additional, Whiteleather, Jennifer Margaret, additional, Whitman, William Russell, additional, Williams, Christina C., additional, Willmer, Christopher N. A., additional, Willott, Chris J., additional, Willoughby, Scott P., additional, Wilson, Andrew, additional, Wilson, Debra, additional, Wilson, Donna V., additional, Windhorst, Rogier, additional, Wislowski, Emily Christine, additional, Wolfe, David J., additional, Wolfe, Michael A., additional, Wolff, Schuyler, additional, Wondel, Amancio, additional, Woo, Cindy, additional, Woods, Robert T., additional, Worden, Elaine, additional, Workman, William, additional, Wright, Gillian S., additional, Wu, Carl, additional, Wu, Chi-Rai, additional, Wun, Dakin D., additional, Wymer, Kristen B., additional, Yadetie, Thomas, additional, Yan, Isabelle C., additional, Yang, Keith C., additional, Yates, Kayla L., additional, Yeager, Christopher R., additional, Yerger, Ethan John, additional, Young, Erick T., additional, Young, Gary, additional, Yu, Gene, additional, Yu, Susan, additional, Zak, Dean S., additional, Zeidler, Peter, additional, Zepp, Robert, additional, Zhou, Julia, additional, Zincke, Christian A., additional, Zonak, Stephanie, additional, and Zondag, Elisabeth, additional
Published: 2023
Full Text: View/download PDF

22. State-of-the-art simulations of line-driven accretion disc winds: realistic radiation hydrodynamics leads to weaker outflows.

Author: Higginbottom, Nick, Scepi, Nicolas, Knigge, Christian, Long, Knox S, Matthews, James H, and Sim, Stuart A
Subjects: ACCRETION disks, IONIZING radiation, RADIATIVE transfer, RADIATION, HYDRODYNAMICS, ACCRETION (Astrophysics), MASS loss (Astrophysics)
Abstract: Disc winds are a common feature in accreting astrophysical systems on all scales. In active galactic nuclei (AGNs) and accreting white dwarfs (AWDs), specifically, radiation pressure mediated by spectral lines is a promising mechanism for driving these outflows. Previous hydrodynamical simulations have largely supported this idea, but relied on highly approximate treatments of ionization and radiative transfer. Given the sensitivity of line driving to the ionization state and radiation field in the outflow, here, we present a new method for carrying out 2.5D radiation hydrodynamic simulations that takes full account of the frequency-dependent radiative transfer through the wind, the corresponding ionization state, and the resulting radiative accelerations. Applying our method to AWDs, we find that it is much harder to drive a powerful line-driven outflow when the interaction between matter and radiation is treated self-consistently. This conclusion is robust to changes in the adopted system parameters. The fundamental difficulty is that discs luminous enough to drive such a wind are also hot enough to overionize it. As a result, the mass-loss rates in our simulations are much lower than those found in earlier, more approximate calculations. We also show that the ultraviolet spectra produced by our simulations do not match those observed in AWDs. We conclude that, unless the overionization problem can be mitigated (e.g. by subgrid clumping or a softer-than-expected radiation field), line driving may not be a promising mechanism for powering the outflows from AWDs. These conclusions are likely to have significant implications for disc winds in AGN also. [ABSTRACT FROM AUTHOR]
Published: 2024
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23. High-resolution Spectra of Supernova Remnants in M83

Author: Winkler, P. Frank, primary, Long, Knox S., additional, Blair, William P., additional, and Points, Sean D., additional
Published: 2023
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24. Stellar feedback in M 83 as observed with MUSE

Author: Della Bruna, Lorenza, primary, Adamo, Angela, additional, McLeod, Anna F., additional, Smith, Linda J., additional, Savard, Gabriel, additional, Robert, Carmelle, additional, Sun, Jiayi, additional, Amram, Philippe, additional, Bik, Arjan, additional, Blair, William P., additional, Long, Knox S., additional, Renaud, Florent, additional, Walterbos, Rene, additional, and Usher, Christopher, additional
Published: 2022
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25. Far-ultraviolet investigation into the galactic globular cluster M30 (NGC 7099) - II. Potential X-ray counterparts and variable sources: Potential X-ray counterparts and variable sources

Author: Mansfield, Santana, Dieball, Andrea, Kroupa, Pavel, Knigge, Christian, Zurek, David R., Shara, Michael, and Long, Knox S.
Abstract: We present a far-ultraviolet (FUV) study of the globular cluster M30 (NGC 7099). The images were obtained using the Advanced Camera for Surveys (ACS/SBC, F150LP, FUV) and the Wide Field Planetary Camera 2 (WFPC2; F300W, UV) on board the Hubble Space Telescope (HST). We compare the catalogue of FUV objects to 10 known X-ray sources and find six confident matches of two cataclysmic variables (CVs), one RS CVn, one red giant with strong FUV emission, and two sources only detected in the FUV. We also searched for variable sources in our data set and found a total of seven blue stragglers (BSs), four horizontal branch (HB) stars, five red giant branch stars, 28 main-sequence stars, and four gap objects that demonstrated variability. One BS star is a known W-UMa contact binary, one of the gap objects is a known CV identified in this work to be a dwarf nova, and the three other gap sources are weak variables. The periods and positions of two of the variable HB stars match them to two previously known RR Lyrae variables of types RRab and RRc.
Published: 2022

26. Far-ultraviolet investigation into the galactic globular cluster M30 (NGC 7099) – II. Potential X-ray counterparts and variable sources

Author: Mansfield, Santana, primary, Dieball, Andrea, additional, Kroupa, Pavel, additional, Knigge, Christian, additional, Zurek, David R, additional, Shara, Michael, additional, and Long, Knox S, additional
Published: 2022
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27. Supernova Remnants in M83 as Observed with MUSE

Author: Long, Knox S., primary, Blair, William P., additional, Winkler, P. Frank, additional, Della Bruna, Lorenza, additional, Adamo, Angela, additional, McLeod, Anna F., additional, and Amram, Phillippe, additional
Published: 2022
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28. Locating the CSM Emission within the Type Ia Supernova Remnant N103B

Author: Guest, Benson T., primary, Blair, William P., additional, Borkowski, Kazimierz J., additional, Ghavamian, Parviz, additional, Hendrick, Sean P., additional, Long, Knox S., additional, Petre, Robert, additional, Raymond, John C., additional, Rest, Armin, additional, Sankrit, Ravi, additional, Seitenzahl, Ivo R., additional, and Williams, Brian J., additional
Published: 2022
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29. Far-ultraviolet investigation into the galactic globular cluster M30 (NGC 7099): I. Photometry and radial distributions

Author: Mansfield, Santana, primary, Dieball, Andrea, additional, Kroupa, Pavel, additional, Knigge, Christian, additional, Zurek, David R, additional, Shara, Michael, additional, and Long, Knox S, additional
Published: 2022
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30. Optical line spectra of tidal disruption events from reprocessing in optically thick outflows

Author: Parkinson, Edward J, primary, Knigge, Christian, additional, Matthews, James H, additional, Long, Knox S, additional, Higginbottom, Nick, additional, Sim, Stuart A, additional, and Mangham, Samuel W, additional
Published: 2022
Full Text: View/download PDF

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30 results on '"Long, Knox S"'

1. SIROCCO: A Publicly Available Monte Carlo Ionization and Radiative Transfer Code for Astrophysical Outflows

2. The Dark Energy Camera Magellanic Clouds Emission-Line Survey

3. A multi-dimensional view of a unified model for TDEs

4. Cataclysmic variables from Sloan Digital Sky Survey -- V (2020-2023) identified using machine learning

5. A disc wind origin for the optical spectra of dwarf novae in outburst

6. The SDSS-V Local Volume Mapper (LVM): Scientific Motivation and Project Overview

7. State-of-the-art simulations of line-driven accretion disc winds: realistic radiation-hydrodynamics leads to weaker outflows

8. Supernova Remnants in the Irregular Galaxy NGC4449

9. A disc wind model for blueshifts in quasar broad emission lines

10. The James Webb Space Telescope Mission

11. High-Resolution Spectra of Supernova Remnants in M83

12. Stellar feedback in M83 as observed with MUSE -- II. Analysis of the HII region population: ionisation budget and pre-SN feedback

13. Far-ultraviolet investigation into the galactic globular cluster M30 (NGC 7099): II. Potential X-ray counterparts and variable sources

14. Supernova Remnants in M83 as Observed with MUSE

15. Far-ultraviolet investigation into the galactic globular cluster M30 (NGC 7099): I. Photometry and radial distributions

16. Locating the CSM Emission within the Type Ia Supernova Remnant N103B

17. Optical line spectra of tidal disruption events from reprocessing in optically thick outflows

18. Supernova Remnants in the Irregular Galaxy NGC 4449

19. State-of-the-art simulations of line-driven accretion disc winds: realistic radiation hydrodynamics leads to weaker outflows

20. A disc wind model for blueshifts in quasar broad emission lines

21. The James Webb Space Telescope Mission

22. State-of-the-art simulations of line-driven accretion disc winds: realistic radiation hydrodynamics leads to weaker outflows.

23. High-resolution Spectra of Supernova Remnants in M83

24. Stellar feedback in M 83 as observed with MUSE

25. Far-ultraviolet investigation into the galactic globular cluster M30 (NGC 7099) - II. Potential X-ray counterparts and variable sources: Potential X-ray counterparts and variable sources

26. Far-ultraviolet investigation into the galactic globular cluster M30 (NGC 7099) – II. Potential X-ray counterparts and variable sources

27. Supernova Remnants in M83 as Observed with MUSE

28. Locating the CSM Emission within the Type Ia Supernova Remnant N103B

29. Far-ultraviolet investigation into the galactic globular cluster M30 (NGC 7099): I. Photometry and radial distributions

30. Optical line spectra of tidal disruption events from reprocessing in optically thick outflows

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30 results on '"Long, Knox S"'

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