Extreme slim accretion disks and narrow line Seyfert 1 galaxies: The nature of the soft X-ray hump

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	Extreme slim accretion disks and narrow line Seyfert 1 galaxies: The nature of the soft X-ray hump
	Wang JM(王建民); Wang, JM; Netzer, H
刊名	ASTRONOMY & ASTROPHYSICS
	2003
卷号	398 期号:3 页码:927-936
关键词	accretion, accretion disks galaxies : active galaxies : Seyfert X-rays : galaxies
通讯作者	Tel Aviv Univ, Sch Phys & Astron, IL-69978 Tel Aviv, Israel ; Tel Aviv Univ, Wise Observ, IL-69978 Tel Aviv, Israel ; Chinese Acad Sci, Inst High Energy Phys, High Energy Astrophys Lab, Beijing 100039, Peoples R China ; Univ Tubingen, Inst Astron & Astrophys, Abt Astron, D-72076 Tubingen, Germany
英文摘要	We present a detailed model of an extreme slim disk (ESD) with a hot corona around a massive black hole with dimensionless accretion rate (m) over dot in the range 2.5 << (m) over dot less than or equal to 100. We assume that a fraction f of the gravitational energy is released in the hot corona and the rest is released in the ESD. The energy equation of the ESD is dominated by advection and the spectrum shows a broad "hump" caused by saturated Comptonization with monochromatic luminosity given by vL(v) proportional to v(0). This relationship enables us to estimate the black hole mass from the ESD luminosity. The spectrum of the hot corona is sensitive to the parameter f (M) over dot and the viscosity and shows a Comptonized power-law with a high-energy cutoff. The model is used to explain the spectral properties of narrow line Seyfert 1 galaxies (NLS1s). In particular, it can explain the spectrum of extreme NLS1s like NLS1 RE J1034+396. Our spectral estimate of the black hole mass in this source is in good agreement with the mass obtained by applying the reververation mapping correlation. We also examine the Eddington ratios in a large NLS1 sample and find that most objects show super-Eddington accretion rates. We argue that soft X-ray humps in NLS1s are natural consequences of super-Eddington accretion in such objects.
学科主题	Astronomy & Astrophysics
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
原文出处	SCI
语种	英语
WOS记录号	WOS:000180637800017
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/238750]
专题	高能物理研究所_粒子天体物理中心
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Wang JM,Wang, JM,Netzer, H. Extreme slim accretion disks and narrow line Seyfert 1 galaxies: The nature of the soft X-ray hump[J]. ASTRONOMY & ASTROPHYSICS,2003,398(3):927-936.
APA	王建民,Wang, JM,&Netzer, H.(2003).Extreme slim accretion disks and narrow line Seyfert 1 galaxies: The nature of the soft X-ray hump.ASTRONOMY & ASTROPHYSICS,398(3),927-936.
MLA	王建民,et al."Extreme slim accretion disks and narrow line Seyfert 1 galaxies: The nature of the soft X-ray hump".ASTRONOMY & ASTROPHYSICS 398.3(2003):927-936.