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SPINS OF SUPERMASSIVE BLACK HOLES IN M87. II. FULLY GENERAL RELATIVISTIC CALCULATIONS
Li YR(李彦荣); Wang JM(王建民); Zhang S(张澍); Li, YR; Yuan, YF; Wang, JM; Wang, JC; Zhang, S
2009
发表期刊ASTROPHYSICAL JOURNAL
卷号699期号:1页码:513-524
通讯作者[Li, Yan-Rong ; Wang, Jian-Min ; Zhang, Shu] CAS, Inst High Energy Phys, Key Lab Particle Astrophys, Beijing 100049, Peoples R China ; [Yuan, Ye-Fei] Univ Sci & Technol China, Key Lab Res Galaxies & Cosmol, Hefei 230026, Anhui, Peoples R China ; [Wang, Jian-Cheng] CAS, Yunnan Observ, Kunming 650011, Peoples R China ; [Wang, Jian-Min] CAS, TPCSF, Kunming 650011, Peoples R China
文章类型Article
摘要The fast variability of energetic TeV photons from the center of M87 has been detected, offering a new clue to estimate spins of supermassive black holes (SMBHs). We extend the study of Wang et al. by including all of the general relativistic effects. We numerically solve the full set of relativistic hydrodynamical equations of the radiatively inefficient accretion flows (RIAFs) and then obtain the radiation fields around the black hole. The optical depth of the radiation fields to TeV photons due to pair productions is calculated in the Kerr metric. We find that the optical depth strongly depends on (1) accretion rates as tau(TeV) proportional to (M) over dot(2.5-5.0), (2) black hole spins, and (3) location of the TeV source. Jointly considering the optical depth and the spectral energy distribution radiated from the RIAFs, the strong degeneration of the spin with the other free parameters in the RIAF model can be largely relaxed. We apply the present model to M87, wherein the RIAFs are expected to be at work, and find that the minimum specific angular momentum of the hole is a similar to 0.8. The present methodology is applicable to M87-like sources with future detection of TeV emissions to constrain the spins of SMBHs.
关键词black hole physics galaxies: individual (M87)
学科领域Astronomy & Astrophysics
DOI10.1088/0004-637X/699/1/513
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语种英语
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
WOS记录号WOS:000267056300041
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被引频次:28[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/311005/237773
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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Li YR,Wang JM,Zhang S,et al. SPINS OF SUPERMASSIVE BLACK HOLES IN M87. II. FULLY GENERAL RELATIVISTIC CALCULATIONS[J]. ASTROPHYSICAL JOURNAL,2009,699(1):513-524.
APA 李彦荣.,王建民.,张澍.,Li, YR.,Yuan, YF.,...&Zhang, S.(2009).SPINS OF SUPERMASSIVE BLACK HOLES IN M87. II. FULLY GENERAL RELATIVISTIC CALCULATIONS.ASTROPHYSICAL JOURNAL,699(1),513-524.
MLA 李彦荣,et al."SPINS OF SUPERMASSIVE BLACK HOLES IN M87. II. FULLY GENERAL RELATIVISTIC CALCULATIONS".ASTROPHYSICAL JOURNAL 699.1(2009):513-524.
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