Evolution of Broad-line Emission from Active Galactic Nuclei

2013/12/17 by Moshe Elitzur, Luis C. Ho, Jonathan R. Trump · 1 citation
Physics and Astronomy · #astro-ph.CO #astro-ph.GA

paper · pdf · doi:10.1093/mnras/stt2445

MNRAS, to be published

arxiv created 2013/12/17 · arxiv updated 2015/06/18

Abstract

Apart from viewing-dependent obscuration, intrinsic broad-line emission from active galactic nuclei (AGNs) follows an evolutionary sequence: Type 1 → 1.2/1.5 → 1.8/1.9 → 2 as the accretion rate onto the central black hole is decreasing. This spectral evolution is controlled, at least in part, by the parameter L_{\rm bol}/M^2/3, where L_{\rm bol} is the AGN bolometric luminosity and M is the black hole mass. Both this dependence and the double-peaked profiles that emerge along the sequence arise naturally in the disk-wind scenario for the AGN broad-line region.

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