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Emergent spectra from slim accretion disks in active galactic nuclei
Wang JM(王建民); Lu FJ(卢方军); Wang, JM; Szuszkiewicz, E; Lu, FJ
1999
发表期刊ASTROPHYSICAL JOURNAL
卷号522期号:2页码:839-845
通讯作者Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China ; Chinese Acad Sci, Inst High Energy Phys, Lab Cosm Ray & High Energy Astrophys, Beijing 100039, Peoples R China ; Beijing Univ, Chinese Acad Sci, Joint Beijing Astrophys Ctr, Beijing 100871, Peoples R China ; Univ Leicester, Dept Phys, Astron Grp, Leicester LE1 7RH, Leics, England ; Univ Sci & Technol China, Ctr Astrophys, Hefei 230026, Peoples R China
文章类型Article
摘要Recently the vertical structure of accretion disks has received much attention because of the available comparison with observations of the big blue bump, but all the calculations are based on the standard accretion disk model. In this paper we calculate the vertical structure and the emergent spectrum based on the radial structure of slim disks from the height-averaged equations. With the a-prescription of energy generation, we obtain the density profile as a Gaussian distribution, then solve the energy transfer problem in the z-direction. We find that the sub-Keplerian rotation affects the density profile in the z-direction. The advection process plays significant roles in the emergent spectrum, especially for high accretion rates. We show that there are two prominent characteristics of the spectrum: the presence of a maximum frequency in the emergent spectrum, which is very weakly dependent on the accretion rate, and a flattened component. These results are beyond the scope of explanation of the standard model of accretion disks even for the model with the modified blackbody spectrum. The present model is suitable for a wide range of disk parameters.
关键词accretion, accretion disks galaxies : active galaxies : kinematics and dynamics
学科领域Astronomy & Astrophysics
研究领域[WOS]Astronomy & Astrophysics ; Astronomy & Astrophysics
DOI10.1086/307686
URL查看原文
语种英语
研究领域[WOS]Astronomy & Astrophysics ; Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
WOS记录号WOS:000082360200019
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被引频次:53[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/311005/238581
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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GB/T 7714
Wang JM,Lu FJ,Wang, JM,et al. Emergent spectra from slim accretion disks in active galactic nuclei[J]. ASTROPHYSICAL JOURNAL,1999,522(2):839-845.
APA 王建民,卢方军,Wang, JM,Szuszkiewicz, E,&Lu, FJ.(1999).Emergent spectra from slim accretion disks in active galactic nuclei.ASTROPHYSICAL JOURNAL,522(2),839-845.
MLA 王建民,et al."Emergent spectra from slim accretion disks in active galactic nuclei".ASTROPHYSICAL JOURNAL 522.2(1999):839-845.
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