DUSTY TORUS FORMATION BY ANISOTROPIC RADIATIVE PRESSURE FEEDBACK OF ACTIVE GALACTIC NUCLEI
Liu Y(刘元); Zhang SN(张双南); Liu, YA; Zhang, SN
刊名ASTROPHYSICAL JOURNAL LETTERS
2011
卷号728期号:2页码:L44
关键词accretion, accretion disks galaxies: active galaxies: nuclei X-rays: galaxies
学科分类Astronomy & Astrophysics
DOI10.1088/2041-8205/728/2/L44
通讯作者[Liu, Yuan ; Zhang, Shuang Nan] Chinese Acad Sci, Key Lab Particle Astrophys, Inst High Energy Phys, Beijing 100049, Peoples R China
文章类型Article
英文摘要The feedback by active galactic nuclei (AGNs) is significant for the formation and evolution of galaxies. It has been realized that the radiative pressure feedback could be an efficient mechanism due to the existence of dust. In this Letter, we discuss the effect of anisotropic radiative pressure, which is inevitable if the UV/optical emission arises from an accretion disk. The distribution of dusty gas should also be anisotropic due to the influence of the anisotropic disk radiation, i.e., the dust in the face-on direction of an accretion disk can be blown out relatively more easily, whereas the dust can survive in the edge-on direction. This result can explain the presence of some obscured AGNs with high Eddington ratios and can also quantitatively reproduce the observed decreasing fraction of type 2 AGNs with increasing luminosity. A sequence of AGN formation and evolution is also proposed, within the context of the formation, evolution, and exhaustion of the dusty torus. Our model predicts the existence of bright AGNs with dusty tori, but without broad-line regions. Finally, we discuss the implications of the anisotropic radiation for the calculations of luminosity functions and radiation efficiencies of AGNs.
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:000286931200020
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被引频次:27[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/311005/241081
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
作者单位中国科学院高能物理研究所
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Liu Y,Zhang SN,Liu, YA,et al. DUSTY TORUS FORMATION BY ANISOTROPIC RADIATIVE PRESSURE FEEDBACK OF ACTIVE GALACTIC NUCLEI[J]. ASTROPHYSICAL JOURNAL LETTERS,2011,728(2):L44.
APA 刘元,张双南,Liu, YA,&Zhang, SN.(2011).DUSTY TORUS FORMATION BY ANISOTROPIC RADIATIVE PRESSURE FEEDBACK OF ACTIVE GALACTIC NUCLEI.ASTROPHYSICAL JOURNAL LETTERS,728(2),L44.
MLA 刘元,et al."DUSTY TORUS FORMATION BY ANISOTROPIC RADIATIVE PRESSURE FEEDBACK OF ACTIVE GALACTIC NUCLEI".ASTROPHYSICAL JOURNAL LETTERS 728.2(2011):L44.
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