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Spins of the supermassive black hole in M87: New constraints from tev observations
Wang JM(王建民); Li YR(李彦荣); Zhang S(张澍); Wang, JM; Li, YR; Wang, JC; Zhang, S
2008
发表期刊ASTROPHYSICAL JOURNAL LETTERS
卷号676期号:2页码:L109-L112
通讯作者[Wang, Jian-Min ; Li, Yan-Rong ; Zhang, Shu] Chinese Acad Sci, Inst High Energy Phys, Key Lab Particle Astrophys, Beijing 100049, Peoples R China ; [Wang, Jian-Min] Chinese Acad Sci, Theoret Phys Ctr Sci Facil, Beijing 100049, Peoples R China ; [Wang, Jian-Cheng] Chinese Acad Sci, Yunnan Observ, Kunming 650011, Peoples R China
文章类型Article
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.
关键词black hole physics galaxies : individual (M87)
学科领域Astronomy & Astrophysics
研究领域[WOS]Astronomy & Astrophysics ; Astronomy & Astrophysics
DOI10.1086/587740
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语种英语
研究领域[WOS]Astronomy & Astrophysics ; Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
WOS记录号WOS:000255235900005
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被引频次:13[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/311005/240239
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
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Wang JM,Li YR,Zhang S,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 王建民.,李彦荣.,张澍.,Wang, JM.,Li, YR.,...&Zhang, S.(2008).Spins of the supermassive black hole in M87: New constraints from tev observations.ASTROPHYSICAL JOURNAL LETTERS,676(2),L109-L112.
MLA 王建民,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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