ON THE OFFSET OF BARRED GALAXIES FROM THE BLACK HOLE M-BH-sigma RELATIONSHIP
文献类型：期刊论文
| 作者 | Brown, Jonathan S.1; Valluri, Monica1; Shen, Juntai2 ; Debattista, Victor P.3
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2013-12-01 |
| 卷号 | 778期号:2页码:151 |
| 关键词 | black hole physics galaxies: evolution galaxies: kinematics and dynamics |
| 英文摘要 | We use collisionless N-body simulations to determine how the growth of a supermassive black hole (SMBH) influences the nuclear kinematics in both barred and unbarred galaxies. In the presence of a bar, the increase in the velocity dispersion sigma (within the effective radius) due to the growth of an SMBH is on average less than or similar to 10%, whereas the increase is only less than or similar to 4% in an unbarred galaxy. In a barred galaxy, the increase results from a combination of three separate factors: (1) orientation and inclination effects; (2) angular momentum transport by the bar that results in an increase in the central mass density; and (3) an increase in the vertical and radial velocity anisotropy of stars in the vicinity of the SMBH. In contrast, the growth of the SMBH in an unbarred galaxy causes the velocity distribution in the inner part of the nucleus to become less radially anisotropic. The increase in sigma following the growth of the SMBH is insensitive to a variation of a factor of 10 in the final mass of the SMBH, showing that it is the growth process rather than the actual SMBH mass that alters bar evolution in a way that increases sigma. We argue that using an axisymmetric stellar dynamical modeling code to measure SMBH masses in barred galaxies could result in a slight overestimate of the derived M-BH, especially if a constant M/L ratio is assumed. We conclude that the growth of a black hole in the presence of a bar could result in an increase in s that is roughly 4%-8% larger than the increase that occurs in an axisymmetric system. While the increase in s due to SMBH growth in a barred galaxy might partially account for the claimed offset of barred galaxies and pseudo bulges from the M-BH-sigma relation obtained for elliptical galaxies and classical bulges in unbarred galaxies, it is inadequate to account for all of the offset. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | AXISYMMETRICAL DYNAMICAL MODELS ; VELOCITY DISPERSION CORRELATION ; ACTIVE GALACTIC NUCLEI ; ON SPIRAL GALAXIES ; TO-LIGHT RATIO ; SPHERICAL GALAXIES ; DISK GALAXIES ; HOST GALAXIES ; FUNDAMENTAL RELATION ; SECULAR EVOLUTION |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000327762800066 |
| 公开日期 | 2014-12-26 |
| 源URL | [http://119.78.226.72//handle/331011/15420]  |
| 专题 | 上海天文台_星系宇宙学重点实验室 |
| 作者单位 | 1.Univ Michigan, Dept Astron, Ann Arbor, MI 48109 USA 2.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, Shanghai 200030, Peoples R China 3.Univ Cent Lancashire, Jeremiah Horrocks Inst, Preston PR1 2HE, Lancs, England |
| 推荐引用方式 GB/T 7714 | Brown, Jonathan S.,Valluri, Monica,Shen, Juntai,et al. ON THE OFFSET OF BARRED GALAXIES FROM THE BLACK HOLE M-BH-sigma RELATIONSHIP[J]. ASTROPHYSICAL JOURNAL,2013,778(2):151. |
| APA | Brown, Jonathan S.,Valluri, Monica,Shen, Juntai,&Debattista, Victor P..(2013).ON THE OFFSET OF BARRED GALAXIES FROM THE BLACK HOLE M-BH-sigma RELATIONSHIP.ASTROPHYSICAL JOURNAL,778(2),151. |
| MLA | Brown, Jonathan S.,et al."ON THE OFFSET OF BARRED GALAXIES FROM THE BLACK HOLE M-BH-sigma RELATIONSHIP".ASTROPHYSICAL JOURNAL 778.2(2013):151. |
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