Accretion rates and the accretion efficiency in AGNs

被引：39

作者：

Bian, WH ^{[1
]}

Zhao, YH

机构：

[1] Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China

[2] Nanjing Normal Univ, Dept Phys, Nanjing 210097, Peoples R China

来源：

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN | 2003年 / 55卷 / 03期

关键词：

accretion : accretion disks; galaxies : active; galaxies : nuclei; galaxies : Seyfert;

D O I：

10.1093/pasj/55.3.599

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We used the standard geometrical-thin accretion theory to obtain the accretion rates in Seyfert 1 galaxies and quasars. Combining the accretion rates with the bolometric luminosity, we obtained the accretion efficiency. We found that most Seyfert 1 galaxies and radio-quiet quasars have lower accretion efficiencies, while most radio-loud quasars possess higher accretion efficiencies. This finding further implies that most of the radio-loud quasars possess Kerr black holes, while Seyfert 1 galaxies and radio-quiet quasars may not possess Kerr black holes. Considering the difference in the accretion efficiency, we found that there is a strong correlation between the accretion rate in units of the Eddington accretion rate and the width of the Hbeta emission line, and that most AGNs are not accreting at super-Eddington rates.

引用

页码：599 / 603

页数：5

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