| Spins of the supermassive black hole in M87: New constraints from tev observations | |
Wang, JM1,2; Li, YR1; Wang JC(王建成)3 ; Zhang, S1; Wang, JM (reprint author), Chinese Acad Sci, Inst High Energy Phys, Key Lab Particle Astrophys, 19B Yuquan Rd, Beijing 100049, Peoples R China.
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| 发表期刊 | ASTROPHYSICAL JOURNAL LETTERS
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| 2008-04-01 | |
| 卷号 | 676期号:2页码:L109-L112 |
| DOI | 10.1086/587740 |
| 产权排序 | 第3完成单位 |
| 收录类别 | SCI |
| 关键词 | Black Hole Physics Galaxies : Individual (M87) |
| 摘要 | The rapid TeV gamma-ray variability detected in the well-known nearby radio galaxy M87 implies an extremely compact emission region (5-10 Schwarzschild radii) near the horizon of the supermassive black hole in the galactic center. TeV photons are affected by dilution due to interaction with the radiation field of the advection-dominated accretion flow (ADAF) around the black hole, and can thus be used to probe the innermost regions around the black hole. We calculate the optical depth of the ADAF radiation field to the TeV photons and find it strongly depends on the spin of the black hole. We find that transparent radii of 10 TeV photons are of 5R(S) and for the maximally rotating and nonrotating black holes, respectively. With the observations, the calculated 13R(S) transparent radii strongly suggest the black hole is spinning fast in the galaxy. TeV photons could be used as a powerful diagnostic for estimating black hole spins in galaxies in the future. |
| 语种 | 英语 |
| 学科领域 | Astronomy & Astrophysics |
| 文章类型 | Article |
| ISSN | 2041-8205 |
| URL | 查看原文 |
| WOS记录号 | WOS:000255235900005 |
| WOS研究方向 | Astronomy & Astrophysics |
| WOS类目 | Astronomy & Astrophysics |
| 关键词[WOS] | ADVECTION-DOMINATED ACCRETION ; ACTIVE GALACTIC NUCLEI ; VLBI OBSERVATIONS ; DISK ; SPECTROSCOPY ; MCG-6-30-15 ; EVOLUTION ; QUASARS |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.ynao.ac.cn/handle/114a53/4964 |
| 专题 | 高能天体物理研究组 |
| 通讯作者 | Wang, JM (reprint author), Chinese Acad Sci, Inst High Energy Phys, Key Lab Particle Astrophys, 19B Yuquan Rd, Beijing 100049, Peoples R China. |
| 作者单位 | 1.Key Laboratory for Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, 19B Yuquan Road, Beijing 100049, China 2.Theoretical Physics Center for Science Facilities, Chinese Academy of Sciences 3.Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011, China |
| 推荐引用方式 GB/T 7714 | Wang, JM,Li, YR,Wang JC,et al. Spins of the supermassive black hole in M87: New constraints from tev observations[J]. ASTROPHYSICAL JOURNAL LETTERS,2008,676(2):L109-L112. |
| APA | Wang, JM,Li, YR,Wang JC,Zhang, S,&Wang, JM .(2008).Spins of the supermassive black hole in M87: New constraints from tev observations.ASTROPHYSICAL JOURNAL LETTERS,676(2),L109-L112. |
| MLA | Wang, JM,et al."Spins of the supermassive black hole in M87: New constraints from tev observations".ASTROPHYSICAL JOURNAL LETTERS 676.2(2008):L109-L112. |
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| Spins of the Superma（120KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | 浏览 请求全文 | |
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