Accretion rates onto massive black holes in four quiescent elliptical galaxies

被引：8

作者：

Wrobel, JM ^{[1
]}

Herrnstein, JR ^{[1
]}

机构：

[1] Natl Radio Astron Observ, Socorro, NM 87801 USA

来源：

ASTROPHYSICAL JOURNAL | 2000年 / 533卷 / 02期

关键词：

accretion; accretion disks; galaxies; individual; (NGC; 4291; NGC; 4564; 4621; 4660); galaxies : nuclei; radio continuum : galaxies; X-rays : galaxies;

D O I：

10.1086/312618

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Four quiescent elliptical galaxies were imaged with the NRAO VLA at 8.5 GHz. Within the context of canonical advection-dominated accretion flows (ADAFs), these VLA images plus published black hole masses constrain the accretion rates to be less than 1.6 x 10(-4), less than 3.6 x 10(-4), less than or equal to 7.8 x 10(-4), and less than or equal to 7.4 x 10(-4) of the Eddington rates. These ADAF accretion rates derived at 8.5 GHz have important implications for the levels of soft and hard X-rays expected from these quiescent galaxies.

引用

页码：L111 / L114

页数：4

共 20 条

[1]

Ball J. A., 1975, MCOMP, V14, P177, DOI DOI 10.1016/B978-0-12-460814-6.50009-7

[2] X-ray luminosities for a magnitude-limited sample of early-type galaxies from the ROSAT All-Sky Survey [J].