High Density Reflection Spectroscopy: II. the Density of the Inner Black Hole Accretion Disc in AGN
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% of sources in our sample show a disc density significantly higher than 1e15 cm^{-3}, which was assumed in previous reflection-based spectral analyses. The best-fit disc densities show an anti-correlation 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.
Keywords
Cite
@article{arxiv.1908.07272,
title = {High Density Reflection Spectroscopy: II. the Density of the Inner Black Hole Accretion Disc in AGN},
author = {Jiachen Jiang and Andrew C. Fabian and Thomas Dauser and Luigi Gallo and Javier A. Garcia and Erin Kara and Michael L. Parker and John A. Tomsick and Dominic J. Walton and Christopher S. Reynolds},
journal= {arXiv preprint arXiv:1908.07272},
year = {2019}
}
Comments
Accepted by MNRAS. The first paper of this series can be found here: arXiv:1901.01739