BAT AGN Spectroscopic Survey XXVII: scattered X-Ray radiation in obscured active galactic nuclei-Reference-Cited by-同舟云学术

BAT AGN Spectroscopic Survey XXVII: scattered X-Ray radiation in obscured active galactic nuclei

Published:2021-03-24 Issue:1 Volume:504 Page:428-443
ISSN:0035-8711
Container-title:Monthly Notices of the Royal Astronomical Society
language:en
Short-container-title:

Author:

Gupta K K¹,Ricci C¹²³^ORCID,Tortosa A¹,Ueda Y⁴,Kawamuro T¹⁵,Koss M⁶^ORCID,Trakhtenbrot B⁷^ORCID,Oh K⁴⁸,Bauer F E⁹¹⁰¹¹,Ricci F⁹^ORCID,Privon G C¹²¹³^ORCID,Zappacosta L¹⁴,Stern D¹⁵,Kakkad D¹⁶,Piconcelli E¹⁴,Veilleux S¹⁷,Mushotzky R¹⁷,Caglar T¹⁸,Ichikawa K¹⁹,Elagali A²⁰²¹,Powell M C²²,Urry C M²³,Harrison F²⁴

Affiliation:

1. Núcleo de Astronomía de la Facultad de Ingeniería, Universidad Diego Portales, Av. Ejército Libertador 441, Santiago 22, Chile

2. Kavli Institute for Astronomy and Astrophysics, Peking University, Beijing 100871, People’s Republic of China

3. Department of Physics & Astronomy, George Mason University, MS 3F3, 4400 University Drive, Fairfax, VA 22030, USA

4. Department of Astronomy, Kyoto University, Kitashirakawa-Oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan

5. National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan

6. Eureka Scientific, 2452 Delmer Street Suite 100, Oakland, CA 94602-3017, USA

7. School of Physics and Astronomy, Tel Aviv University, Tel Aviv 69978, Israel

8. Korea Astronomy & Space Science institute, 776, Daedeokdae-ro, Yuseong-gu, Daejeon 34055, Republic of Korea

9. Instituto de Astrofísica and Centro de Astroingeniería, Facultad de Física, Pontificia Universidad Católica de Chile, Casilla 306, Santiago 22, Chile

10. Millennium Institute of Astrophysics, Nuncio Monseñor Sótero Sanz 100, Providencia, Santiago, Chile

11. Space Science Institute, 4750 Walnut Street, Suite 205, Boulder, Colorado 80301, USA

12. Department of Astronomy, University of Florida, 211 Bryant Space Science Center, Gainesville, FL 32611, USA

13. National Radio Astronomy Observatory, 520 Edgemont Rd, Charlottesville, VA 22903, USA

14. Osservatorio Astronomico di Roma, via di Frascati 33, I-00078 Monte Porzio Catone, Italy

15. Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, MS 169-224, Pasadena, CA 91109, USA

16. European Southern Observatory, Alonso de Cordova 3107, Casilla 19, Santiago 19001, Chile

17. Department of Astronomy, University of Maryland, College Park, MD 20742, USA

18. Leiden Observatory, PO Box 9513, NL-2300 RA Leiden, the Netherlands

19. Frontier Research Institute for Interdisciplinary Sciences, Tohoku University, Sendai 980-8578, Japan

20. International Centre for Radio Astronomy Research, The University of Western Australia, M468, 35 Stirling Highway, Crawley, WA 6009, Australia

21. Australia Telescope National Facility, CSIRO Astronomy and Space Science, PO Box 76, Epping, NSW 1710, Australia

22. Institute of Particle Astrophysics and Cosmology, Stanford University, 452 Lomita Mall, Stanford, CA 94305, USA

23. Physics Department, Yale Center for Astronomy & Astrophysics, New Haven, CT 06520, USA

24. Cahill Center for Astronomy and Astrophysics, California Institute of Technology, Pasadena, CA 91125, USA

Abstract

ABSTRACT Accreting supermassive black holes (SMBHs), also known as active galactic nuclei (AGN), are generally surrounded by large amounts of gas and dust. This surrounding material reprocesses the primary X-ray emission produced close to the SMBH and gives rise to several components in the broadband X-ray spectra of AGN, including a power-law possibly associated with Thomson-scattered radiation. In this work, we study the properties of this scattered component for a sample of 386 hard-X-ray-selected, nearby ($z\sim0.03$) obscured AGN from the 70-month Swift/BAT catalogue. We investigate how the fraction of Thomson-scattered radiation correlates with different physical properties of AGN, such as line-of-sight column density, X-ray luminosity, black hole mass, and Eddington ratio. We find a significant negative correlation between the scattering fraction and the column density. Based on a large number of spectral simulations, we exclude the possibility that this anticorrelation is due to degeneracies between the parameters. The negative correlation also persists when considering different ranges of luminosity, black hole mass, and Eddington ratio. We discuss how this correlation might be either due to the angle dependence of the Thomson cross-section or to more obscured sources having a higher covering factor of the torus. We also find a positive correlation between the scattering fraction and the ratio of [O iii] λ5007 to X-ray luminosity. This result is consistent with previous studies and suggests that the Thomson-scattered component is associated with the narrow-line region.

Funder

NASA

Jet Propulsion Laboratory

California Institute of Technology

GSFC

ESO – Government of Chile Joint Committee

FONDECYT

CATA

National Research Foundation of Korea

ASI

INAF

Publisher