A COMPARISON OF C-IV AND H-BETA BROAD EMISSION-LINE PROFILES IN LOW-REDSHIFT ACTIVE GALACTIC NUCLEI

被引：19
|
作者：
CORBIN, MR
机构：
[1] Department of Astronomy, Ohio State University, Columbus, OH 43210
来源：
ASTROPHYSICAL JOURNAL | 1991年 / 371卷 / 02期
关键词：
GALAXIES; NUCLEI; LINE PROFILES; QUASARS;
D O I：
10.1086/186000
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Recently published IUE spectra of low-redshift QSOs and Seyfert 1 galaxies have permitted a comparison of the profiles of the C IV lambda-1549 and H-beta broad emission lines. A linear correlation between the FWHM values of the profiles has been found in a sample of 19 objects and is verified to not be the result of separate correlations between these parameters and luminosity. Interpreted in terms of the geometry of the broad-line region, this result is contrary to models which predict low-ionization line emission from an optically thick, geometrically thin accretion disk surrounding the central object. Current evidence favors a model in which broad-line emission arises predominantly in a stratified ensemble of clouds moving radially relative to the central continuum source.
引用
收藏
页码：L51 / L54
页数：4
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