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Broad-Line Profiles and Time Lags of Bloated Stars

Published online by Cambridge University Press:  12 April 2016

Tal Alexander
Tal Alexander*
Affiliation:
School of Physics and Astronomy, Tel Aviv University, Tel Aviv, Israel

Abstract

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The bloated stars model for AGN broad-line emission proposes that this emission originates in the mass-loss envelopes or winds of giant stars. I present here a version of the model that simultaneously reproduces typical AGN broad emission-line ratios, line profiles, and linereverberation time lags without excessive stellar collisions. This can be achieved if (1) the bloated star envelope is about 10 times denser than that of normal supergiants, (2) the fraction of the bloated stars within the stellar population falls off as r−2, and (3) the size of the envelope is limited by the black-hole tidal forces.

Type
IV. Physics of the Broad-Line Region
Information
International Astronomical Union Colloquium , Volume 159: Emission Lines in Active Galaxies: New Methods and Techniques , 1997 , pp. 207 - 210
Copyright
Copyright © Astronomical Society of the Pacific 1997

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