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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.
发表期刊ASTROPHYSICAL JOURNAL LETTERS
2008-04-01
卷号676期号:2页码:L109-L112
DOI10.1086/587740
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
ISSN2041-8205
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
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被引频次:16[WOS]   [WOS记录]     [WOS相关记录]
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
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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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