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Title:
The time variation of broad emission-line profiles of Seyfert 1 galaxies
Authors:
Capriotti, E. R.; Foltz, C. B.; Peterson, B. M.
Affiliation:
AA(Perkins Observatory, Delaware, OH), AB(Perkins Observatory, Delaware, OH), AC(Perkins Observatory, Delaware, OH)
Publication:
Astrophysical Journal, Part 1, vol. 261, Oct. 1, 1982, p. 35-41. (ApJ Homepage)
Publication Date:
10/1982
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
Emission Spectra, Seyfert Galaxies, Spectral Line Width, Doppler Effect, H Beta Line, Spectrum Analysis
DOI:
10.1086/160315
Bibliographic Code:
1982ApJ...261...35C

Abstract

Broad-line profiles have been calculated for models of the emitting region of Seyfert 1 galaxies in which the emitting clouds are in radial outflow. The continuum source is assumed to vary on a time scale a bit shorter than the light-travel time through the broad-line emitting region. The combination of a variable continuum source and light-travel time considerations produces the following effects: the calculated profiles have considerable structure which is introduced by continuum variations; the calculated profiles can be asymmetric in the sense often observed in Seyfert 1 spectra even if the clouds are assumed to emit line radiation isotropically; and the variation of the H-beta profiles of Arakelian 120 is roughly reproduced by the calculations.

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