High Density Reflection Spectroscopy - II. The density of the inner black hole accretion disc in AGN

Jiang J, Fabian AC, Dauser T, Gallo L, Garcia J, Kara E, Parker ML, Tomsick JA, Walton DJ, Reynolds CS (2019)

Publication Type: Journal article

Publication year: 2019

Journal

Monthly Notices of the Royal Astronomical Society Oxford University Press

Book Volume: 489

Pages Range: 3436-3455

Journal Issue: 3

DOI: 10.1093/mnras/stz2326

Abstract

We present a high density disc reflection spectral analysis of a sample of 17 Seyfert 1 galaxies to study the inner disc densities at different black hole mass scales and accretion rates. All the available XMM-Newton observations in the archive are used. OM observations in the optical/UV band are used to estimate their accretion rates. We find that 65 per cent of sources in our sample show a disc density significantly higher than ne = 1015 cm-3, which was assumed in previous reflection-based spectral analyses. The best-fitting disc densities show an anticorrelation with black hole mass and mass accretion rate. High density disc reflection model can successfully explain the soft excess emission and significantly reduce inferred iron abundances. We also compare our black hole spin and disc inclination angle measurements with previous analyses.

Authors with CRIS profile

Thomas Dauser Dr.Karl-Remeis-Sternwarte Bamberg, Astronomisches Institut Javier Garcia Dr.Karl-Remeis-Sternwarte Bamberg, Astronomisches Institut

Involved external institutions

University of Cambridge GB United Kingdom (GB) Saint Mary's University CA Canada (CA) University of Maryland US United States (USA) (US) European Space Agency (ESA) FR France (FR) University of California, Berkeley US United States (USA) (US)

How to cite

APA:

Jiang, J., Fabian, A.C., Dauser, T., Gallo, L., Garcia, J., Kara, E.,... Reynolds, C.S. (2019). High Density Reflection Spectroscopy - II. The density of the inner black hole accretion disc in AGN. Monthly Notices of the Royal Astronomical Society, 489(3), 3436-3455. https://doi.org/10.1093/mnras/stz2326

MLA:

Jiang, Jiachen, et al. "High Density Reflection Spectroscopy - II. The density of the inner black hole accretion disc in AGN." Monthly Notices of the Royal Astronomical Society 489.3 (2019): 3436-3455.

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