| Title | X-Ray Coronal Properties of Swift/BAT-selected Seyfert 1 Active Galactic Nuclei |
| Authors | Kamraj, Nikita Brightman, Murray Harrison, Fiona A. Stern, Daniel Garcia, Javier A. Balokovic, Mislav Ricci, Claudio Koss, Michael J. Mejia-Restrepo, Julian E. Oh, Kyuseok Powell, Meredith C. Urry, C. Megan |
| Affiliation | CALTECH, Cahill Ctr Astron & Astrophys, Pasadena, CA 91125 USA CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA Dr Karl Remeis Observ, Sternwartstr 7, D-96049 Bamberg, Germany Erlangen Ctr Astroparticle Phys, Sternwartstr 7, D-96049 Bamberg, Germany Yale Ctr Astron & Astrophys, 52 Hillhouse Ave, New Haven, CT 06511 USA Yale Univ, Dept Phys, POB 208120, New Haven, CT 06520 USA Univ Diego Portales, Nucleo Astron, Fac Ingn, Av Ejercito Libertador 441, Santiago 22, Chile Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China George Mason Univ, Dept Phys & Astron, MS 3F3,4400 Univ Dr, Fairfax, VA 22030 USA Eureka Sci, 2452 Delmer St Suite 100, Oakland, CA 94602 USA Space Sci Inst, 4750 Walnut St,Suite 205, Boulder, CO 80301 USA European Southern Observ, Casilla 19001, Santiago 19, Chile Korea Astron & Space Sci Inst, 776 Daedeokdae Ro, Daejeon 34055, South Korea Kyoto Univ, Dept Astron, Sakyo Ku, Kitashirakawa Oiwake Cho, Kyoto 6068502, Japan Stanford Univ, Kavli Inst Particle Astrophys & Cosmol, 452 Lomita Mall, Stanford, CA 94305 USA |
| Keywords | AGN SPECTROSCOPIC SURVEY HIGH-ENERGY CUTOFF BLACK-HOLE MASS XMM-NEWTON BEPPOSAX OBSERVATIONS GAMMA-RAY SPECTRUM NUSTAR BROAD GALAXIES |
| Issue Date | 1-Mar-2022 |
| Publisher | ASTROPHYSICAL JOURNAL |
| Abstract | The corona is an integral component of active galactic nuclei (AGNs) which produces the bulk of the X-ray emission above 1-2 keV. However, many of its physical properties and the mechanisms powering this emission remain a mystery. In particular, the temperature of the coronal plasma has been difficult to constrain for large samples of AGNs, as constraints require high-quality broadband X-ray spectral coverage extending above 10 keV in order to measure the high-energy cutoff, which provides constraints on the combination of coronal optical depth and temperature. We present constraints on the coronal temperature for a large sample of Seyfert 1 AGNs selected from the Swift/BAT survey using high-quality hard X-ray data from the NuSTAR observatory combined with simultaneous soft X-ray data from Swift/XRT or XMM-Newton. When applying a physically motivated, nonrelativistic disk-reflection model to the X-ray spectra, we find a mean coronal temperature kT ( e ) = 84 +/- 9 keV. We find no significant correlation between the coronal cutoff energy and accretion parameters such as the Eddington ratio and black hole mass. We also do not find a statistically significant correlation between the X-ray photon index, Gamma, and Eddington ratio. This calls into question the use of such relations to infer properties of supermassive black hole systems. |
| URI | http://hdl.handle.net/20.500.11897/638820 |
| ISSN | 0004-637X |
| DOI | 10.3847/1538-4357/ac45f6 |
| Indexed | SCI(E) |
| Appears in Collections: | 科维理天文与天体物理研究所 |
