1 code implementation • 20 Dec 2022 • Chuan Tian, C. Megan Urry, Aritra Ghosh, Ryan Ofman, Tonima Tasnim Ananna, Connor Auge, Nico Cappelluti, Meredith C. Powell, David B. Sanders, Kevin Schawinski, Dominic Stark, Grant R. Tremblay
The classification precision of our models has a noticeable dependency on host galaxy radius and magnitude.
no code implementations • 8 Feb 2021 • Ryan W. Pfeifle, Claudio Ricci, Peter G. Boorman, Marko Stalevski, Daniel Asmus, Benny Trakhtenbrot, Michael J. Koss, Daniel Stern, Federica Ricci, Shobita Satyapal, Kohei Ichikawa, David J. Rosario, Turgay Caglar, Ezequiel Treister, Meredith Powell, Kyuseok Oh, C. Megan Urry, Fiona Harrison
In this study, we use the SWIFT/BAT AGN sample, which has received extensive multiwavelength follow-up analysis as a result of the BAT AGN Spectroscopic Survey (BASS), to develop a diagnostic for nuclear obscuration by examining the relationship between the line-of-sight column densities ($N_{\rm{H}}$), the 2-10 keV-to-$12\,\rm{\mu m}$ luminosity ratio, and WISE mid-infrared colors.
Astrophysics of Galaxies
1 code implementation • 25 Jun 2020 • Aritra Ghosh, C. Megan Urry, Zhengdong Wang, Kevin Schawinski, Dennis Turp, Meredith C. Powell
This inferred difference in quenching mechanism is in agreement with previous studies that used other morphology classification techniques on much smaller samples at $z\sim0$ and $z\sim1$.
Astrophysics of Galaxies Instrumentation and Methods for Astrophysics
1 code implementation • 1 Aug 2018 • Grant R. Tremblay, Françoise Combes, J. B. Raymond Oonk, Helen R. Russell, Michael A. McDonald, Massimo Gaspari, Bernd Husemann, Paul E. J. Nulsen, Brian R. McNamara, Stephen L. Hamer, Christopher P. O'Dea, Stefi A. Baum, Timothy A. Davis, Megan Donahue, G. Mark Voit, Alastair C. Edge, Elizabeth L. Blanton, Malcolm N. Bremer, Esra Bulbul, Tracy E. Clarke, Laurence P. David, Louise O. V. Edwards, Dominic A. Eggerman, Andrew C. Fabian, William R. Forman, Christine Jones, Nathaniel Kerman, Ralph P. Kraft, Yuan Li, Meredith C. Powell, Scott W. Randall, Philippe Salomé, Aurora Simionescu, Yuanyuan Su, Ming Sun, C. Megan Urry, Adrian N. Vantyghem, Belinda J. Wilkes, John A. ZuHone
The entire scenario is therefore consistent with a galaxy-spanning "fountain", wherein cold gas clouds drain into the black hole accretion reservoir, powering jets and bubbles that uplift a cooling plume of low-entropy multiphase gas, which may stimulate additional cooling and accretion as part of a self-regulating feedback loop.
Astrophysics of Galaxies
1 code implementation • 7 Jun 2016 • Grant R. Tremblay, J. B. Raymond Oonk, Françoise Combes, Philippe Salomé, Christopher P. O'Dea, Stefi A. Baum, G. Mark Voit, Megan Donahue, Brian R. McNamara, Timothy A. Davis, Michael A. McDonald, Alastair C. Edge, Tracy E. Clarke, Roberto Galván-Madrid, Malcolm N. Bremer, Louise O. V. Edwards, Andrew C. Fabian, Stephen L. Hamer, Yuan Li, Anaëlle Maury, Helen R. Russell, Alice C. Quillen, C. Megan Urry, Jeremy S. Sanders, Michael Wise
Supermassive black holes in galaxy centres can grow by the accretion of gas, liberating energy that might regulate star formation on galaxy-wide scales.
Astrophysics of Galaxies High Energy Astrophysical Phenomena