NAOC Open IR  > 星系宇宙学研究部
ON PROBING THE PROPERTIES OF QSOs THROUGH THEIR PROXIMITY EFFECTS ON THE INTERGALACTIC MEDIUM
Lu, Youjun1; Yu, Qingjuan2
2011-07-20
发表期刊ASTROPHYSICAL JOURNAL
卷号736期号:1
摘要The proximity effect (PE) of QSOs is believed to be useful in constraining the QSO lifetime. Observations of the PE so far, however, give apparently contradictory results-some are consistent with a long QSO lifetime (greater than or similar to a few 10(7) yr), but others appear to be only consistent with a short QSO lifetime (less than or similar to 10(6) yr). In this paper, we show that this apparent contradiction may be solved by simultaneously taking into account both the effect due to the density enhancement in the QSO near zones and that due to the obscuration of the tori associated with the QSOs, using a large number of Monte Carlo generated synthetic Ly alpha forest spectra. We demonstrate that the QSO properties and environment can be constrained simultaneously by the transverse PE (TPE) and the line-of-sight PE of bright type 1 QSOs together. The current available measurements on the PEs of type 1 QSOs suggest that (1) the density is significantly enhanced in the vicinity of the QSOs; (2) the QSO lifetime is consistent with being as large as a few 10(7) yr, and a substantially shorter lifetime (e. g., less than or similar to 10(6) yr) is not required; and (3) the half opening angle of the tori associated with QSOs is similar to 60 degrees, consistent with some other independent estimates. Our simulations also show that the TPE of type 2 QSOs can be significantly different from that of type 1 QSOs, which may be useful to put further constraints on the QSO properties and the QSO environment.
关键词Black Hole Physics Intergalactic Medium Quasars: Absorption Lines Quasars: General
DOI10.1088/0004-637X/736/1/49
收录类别SCI
语种英语
WOS记录号WOS:000292645600049
引用统计
被引频次:8[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.bao.ac.cn/handle/114a11/7929
专题星系宇宙学研究部
作者单位1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
2.Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100891, Peoples R China
推荐引用方式
GB/T 7714
Lu, Youjun,Yu, Qingjuan. ON PROBING THE PROPERTIES OF QSOs THROUGH THEIR PROXIMITY EFFECTS ON THE INTERGALACTIC MEDIUM[J]. ASTROPHYSICAL JOURNAL,2011,736(1).
APA Lu, Youjun,&Yu, Qingjuan.(2011).ON PROBING THE PROPERTIES OF QSOs THROUGH THEIR PROXIMITY EFFECTS ON THE INTERGALACTIC MEDIUM.ASTROPHYSICAL JOURNAL,736(1).
MLA Lu, Youjun,et al."ON PROBING THE PROPERTIES OF QSOs THROUGH THEIR PROXIMITY EFFECTS ON THE INTERGALACTIC MEDIUM".ASTROPHYSICAL JOURNAL 736.1(2011).
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Lu, Youjun]的文章
[Yu, Qingjuan]的文章
百度学术
百度学术中相似的文章
[Lu, Youjun]的文章
[Yu, Qingjuan]的文章
必应学术
必应学术中相似的文章
[Lu, Youjun]的文章
[Yu, Qingjuan]的文章
相关权益政策
暂无数据
收藏/分享
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。