IHEP OpenIR  > 粒子天体物理中心
The central engines of radio-loud quasars
Wang JM(王建民); Wang, JM; Ho, LC; Staubert, R
2003
发表期刊ASTRONOMY & ASTROPHYSICS
卷号409期号:3页码:887-898
通讯作者Univ Tubingen, Inst Astron & Astrophys, Abt Astron, D-72076 Tubingen, Germany ; CAS, Inst High Energy Phys, High Energy Astrophys Lab, Beijing 100039, Peoples R China ; Observ Carnegie Inst Washington, Pasadena, CA 91101 USA
摘要We have assembled a sample of 37 radio-loud quasars that have been imaged with the Hubble Space Telescope in order to investigate their black hole masses, accretion rates, and the structure of their accretion disks. The black hole masses were estimated from the luminosities of the host galaxies, and the accretion powers were extrapolated from the emission-line luminosities. The majority of the quasars have masses in the range M-BH approximate to 10(8)-10(9) M.. Their accretion rates, (M) over dot approximate to 0.01-1 times the Eddington rate, suggest that most of the objects possess standard optically thick, geometrically thin accretion disks, in some cases perhaps accompanied by an optically thin advection-dominated component. The coexistence of strong radio emission and a standard disk conflicts with recent models for jet formation. We discuss modifications of the standard model that can resolve this discrepancy. We find there is a strong correlation between the accretion rate and the extended radio luminosity. This lends support to the idea that the extended radio emission is somehow linked to the accretion disk. Lastly, we combine the present sample of radio-loud quasars with the sample of BL Lac objects studied by Wang et al. (2002) to reevaluate the unification picture for radio-loud active galactic nuclei. Consistent with current ideas for the unification of radio-loud sources, we find that flat-spectrum radio quasars and FR II radio galaxies indeed seem to belong to the same population, as do BL Lac objects and FR I radio galaxies on the opposite end of the luminosity spectrum. However, some members of the low frequency-peaked BL Lac objects may be more closely associated with FR II rather than FR I radio galaxies. We describe how the various subclasses of radio-loud sources can be viewed as a continuous sequence of varying accretion rate.
文章类型Review
关键词BL Lacertae objects : general galaxies : active galaxies : jets galaxies : Seyfert quasars : general
学科领域Astronomy & Astrophysics
研究领域[WOS]Astronomy & Astrophysics
DOI10.1051/0004-6361:20031218
URL查看原文
语种英语
WOS类目Astronomy & Astrophysics
WOS记录号WOS:000185572300016
引用统计
被引频次:23[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/238682
专题粒子天体物理中心
作者单位中国科学院高能物理研究所
推荐引用方式
GB/T 7714
Wang JM,Wang, JM,Ho, LC,et al. The central engines of radio-loud quasars[J]. ASTRONOMY & ASTROPHYSICS,2003,409(3):887-898.
APA 王建民,Wang, JM,Ho, LC,&Staubert, R.(2003).The central engines of radio-loud quasars.ASTRONOMY & ASTROPHYSICS,409(3),887-898.
MLA 王建民,et al."The central engines of radio-loud quasars".ASTRONOMY & ASTROPHYSICS 409.3(2003):887-898.
条目包含的文件
文件名称/大小 文献类型 版本类型 开放类型 使用许可
5668.pdf(264KB)期刊论文作者接受稿开放获取CC BY-NC-SA浏览 请求全文
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[王建民]的文章
[Wang, JM]的文章
[Ho, LC]的文章
百度学术
百度学术中相似的文章
[王建民]的文章
[Wang, JM]的文章
[Ho, LC]的文章
必应学术
必应学术中相似的文章
[王建民]的文章
[Wang, JM]的文章
[Ho, LC]的文章
相关权益政策
暂无数据
收藏/分享
文件名: 5668.pdf
格式: Adobe PDF
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。