NAOC Open IR  > 空间科学研究部
An accretion model for the growth of the central black hole associated with ionization instability in quasars
Lu, Y; Cheng, KS; Zhang, SN
2003-06-10
Source PublicationASTROPHYSICAL JOURNAL
Volume590Issue:1Pages:52-57
AbstractA possible accretion model associated with the ionization instability of quasar disks is proposed to address the growth of the central black hole (BH) harbored in the host galaxy. The evolution of quasars in cosmic time is assumed to change from a highly active state to a quiescent state triggered by the S-shaped ionization instability of the quasar accretion disk. For a given external mass transfer rate (M) over dot (ext) supplied by the quasar host galaxy, ionization instability can modify the accretion rate in the disk and separate the accretion flows of the disk into three different phases, like an S-shape. We suggest that the bright quasars observed today are those quasars with disks in the upper branch of the S-shaped instability, and the faint or "dormant'' quasars are simply these systems in the lower branch. The middle branch is the transition state, which is unstable. We assume the quasar disk evolves according to the advection-dominated inflow-outflow solution (ADIOS) configuration in the stable lower branch of the S-shaped instability, and the Eddington accretion rate is used to constrain the accretion rate in the highly active phase. The mass ratio between a BH and its host galactic bulge is a natural consequence of an ADIOS. Our model also demonstrates that a seed BH (similar to2 x 10(6) M.) similar to those found in spiral galaxies today is needed to produce a BH with a final mass of similar to2 x 10(8) M..
KeywordBlack Hole Physics Accretion Galaxies : Active Accretion Disks Galaxies : Bulges Galaxies : Nuclei Quasars : General
Indexed BySCI
Language英语
WOS IDWOS:000183278700006
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/8449
Collection空间科学研究部
Affiliation1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
2.Univ Hong Kong, Dept Phys, Hong Kong, Hong Kong, Peoples R China
3.Tsing Hua Univ, Dept Phys, Beijing 100084, Peoples R China
4.Tsing Hua Univ, Ctr Astrophys, Beijing 100084, Peoples R China
5.Univ Alabama, Dept Phys, Huntsville, AL 35899 USA
Recommended Citation
GB/T 7714
Lu, Y,Cheng, KS,Zhang, SN. An accretion model for the growth of the central black hole associated with ionization instability in quasars[J]. ASTROPHYSICAL JOURNAL,2003,590(1):52-57.
APA Lu, Y,Cheng, KS,&Zhang, SN.(2003).An accretion model for the growth of the central black hole associated with ionization instability in quasars.ASTROPHYSICAL JOURNAL,590(1),52-57.
MLA Lu, Y,et al."An accretion model for the growth of the central black hole associated with ionization instability in quasars".ASTROPHYSICAL JOURNAL 590.1(2003):52-57.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Lu, Y]'s Articles
[Cheng, KS]'s Articles
[Zhang, SN]'s Articles
Baidu academic
Similar articles in Baidu academic
[Lu, Y]'s Articles
[Cheng, KS]'s Articles
[Zhang, SN]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Lu, Y]'s Articles
[Cheng, KS]'s Articles
[Zhang, SN]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.