A new way to measure supermassive black hole spin in accretion disc-dominated active galaxies

CORC > 高能物理研究所 > 中国科学院高能物理研究所 > 粒子天体物理中心

	A new way to measure supermassive black hole spin in accretion disc-dominated active galaxies
	Done, C; Jin, C; Middleton, M; Ward, M
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2013
卷号	434 期号:3 页码:1955-1963
关键词	accretion black hole physics galaxies: Seyfert ultraviolet: galaxies X-rays: galaxies accretion discs
英文摘要	We show that disc continuum fitting can be used to constrain black hole spin in a subclass of narrow-line Seyfert 1 (NLS1) active galactic nuclei as their low mass and high mass accretion rate means that the disc peaks at energies just below the soft X-ray bandpass. We apply the technique to the NLS1 PG1244+026, where the optical/UV/X-ray spectrum is consistent with being dominated by a standard disc component. This gives a best estimate for black hole spin which is low, with a firm upper limit of a(*) < 0.86. This contrasts with the recent X-ray determinations of (close to) maximal black hole spin in other NLS1 based on relativistic smearing of the iron profile. While our data on PG1244+026 do not have sufficient statistics at high energy to give a good measure of black hole spin from the iron line profile, cosmological simulations predict that black holes with similar masses have similar growth histories and so should have similar spins. This suggests that there is a problem either in our understanding of disc spectra, or/and X-ray reflection or/and the evolution of black hole spin.
学科主题	Astronomy & Astrophysics
收录类别	SCI
WOS记录号	WOS:000323639900012
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/224178]
专题	高能物理研究所_粒子天体物理中心
推荐引用方式 GB/T 7714	Done, C,Jin, C,Middleton, M,et al. A new way to measure supermassive black hole spin in accretion disc-dominated active galaxies[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2013,434(3):1955-1963.
APA	Done, C,Jin, C,Middleton, M,&Ward, M.(2013).A new way to measure supermassive black hole spin in accretion disc-dominated active galaxies.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,434(3),1955-1963.
MLA	Done, C,et al."A new way to measure supermassive black hole spin in accretion disc-dominated active galaxies".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 434.3(2013):1955-1963.