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
学科分类Astronomy & Astrophysics
DOI10.1051/0004-6361:20021511
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
文章类型Article
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.
类目[WOS]Astronomy & Astrophysics
研究领域[WOS]Astronomy & Astrophysics
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语种英语
WOS记录号WOS:000180637800017
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被引频次:65[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/311005/238750
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
作者单位中国科学院高能物理研究所
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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.
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