A NEW APPROACH TO CONSTRAIN BLACK HOLE SPINS IN ACTIVE GALAXIES USING OPTICAL REVERBERATION MAPPING
Wang JM(王建民); Du P(杜璞); Li YR(李彦荣); 胡晨;Wang, JM; Du, P; Li, YR; Ho, LC; Hu, C; Bai, JM
刊名ASTROPHYSICAL JOURNAL LETTERS
2014
卷号792期号:1页码:L13
关键词accretion, accretion disks galaxies: active
学科分类Astronomy & Astrophysics
DOI10.1088/2041-8205/792/1/L13
英文摘要A tight relation between the size of the broad-line region (BLR) and optical luminosity has been established in about 50 active galactic nuclei studied through reverberation mapping of the broad H beta emission line. The R-BLR-L relation arises from simple photoionization considerations. Using a general relativistic model of an optically thick, geometrically thin accretion disk, we show that the ionizing luminosity jointly depends on black hole mass, accretion rate, and spin. The non-monotonic relation between the ionizing and optical luminosity gives rise to a complicated relation between the BLR size and the optical luminosity. We show that the reverberation lag of H beta to the varying continuum depends very sensitively on black hole spin. For retrograde spins, the disk is so cold that there is a deficit of ionizing photons in the BLR, resulting in shrinkage of the hydrogen ionization front with increasing optical luminosity, and hence shortened H beta lags. This effect is specially striking for luminous quasars undergoing retrograde accretion, manifesting in strong deviations from the canonical R-BLR-L relation. This could lead to a method to estimate black hole spins of quasars and to study their cosmic evolution. At the same time, the small scatter of the observed R-BLR-L relation for the current sample of reverberation-mapped active galaxies implies that the majority of these sources have rapidly spinning black holes.
收录类别SCI
WOS记录号WOS:000341306900013
引用统计
被引频次:6[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/311005/224856
专题中国科学院高能物理研究所_粒子天体物理中心_期刊论文
中国科学院高能物理研究所_粒子天体物理中心
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Wang JM,Du P,Li YR,et al. A NEW APPROACH TO CONSTRAIN BLACK HOLE SPINS IN ACTIVE GALAXIES USING OPTICAL REVERBERATION MAPPING[J]. ASTROPHYSICAL JOURNAL LETTERS,2014,792(1):L13.
APA 王建民.,杜璞.,李彦荣.,胡晨;Wang, JM.,Du, P.,...&Bai, JM.(2014).A NEW APPROACH TO CONSTRAIN BLACK HOLE SPINS IN ACTIVE GALAXIES USING OPTICAL REVERBERATION MAPPING.ASTROPHYSICAL JOURNAL LETTERS,792(1),L13.
MLA 王建民,et al."A NEW APPROACH TO CONSTRAIN BLACK HOLE SPINS IN ACTIVE GALAXIES USING OPTICAL REVERBERATION MAPPING".ASTROPHYSICAL JOURNAL LETTERS 792.1(2014):L13.
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