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arXiv 0802.1786astro-ph
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类星体的基本面及主核关系

The Fundamental Plane of QSOs and the Relationship Between Host and Nucleus

Timothy S. Hamilton, Stefano Casertano, David A. Turnshek

摘要:

我们目前的结果,从档案研究的70个中等红移类星体观测与宽视场行星相机2上的哈勃太空望远镜。类星体的星等M_V <= -23(总核光加宿主光),红移为$0.06 <= z <= 0.46$。本研究的目的是调查类星体的核和主机属性之间的联系,使用高分辨率图像和删除中心点源,以揭示主机结构。我们证实,更明亮的类星体核被发现在更明亮的宿主星系。使用文献中的中心黑洞质量,我们发现核光度也通常随黑洞质量而增加,但并不紧密相关。核光度范围为爱丁顿极限的2.3%至200%。那些在椭圆形主机覆盖的范围相当均匀,而那些在螺旋形聚集在爱丁顿限制附近。利用主成分分析,我们找到了一种将核光度与核球大小和有效表面星等联系起来的基本面。使用光学核光度,这个关系解释了整个样本中96.1%的方差,而另一个版本的关系使用X射线核光度,解释了95.2%的方差。这类星体基本平面的形式显示出相似之处,充分研究的基本平面的椭圆星系,我们研究它们之间可能的关系,以及在建立这种连接所涉及的困难。

英文摘要:

We present results from an archival study of 70 medium-redshift QSOs observed with the Wide Field Planetary Camera 2 on board the Hubble Space Telescope. The QSOs have magnitudes M_V <= -23 (total nuclear plus host light) and redshifts $0.06 <= z <= 0.46$. The aim of the present study is to investigate the connections between the nuclear and host properties of QSOs, using high-resolution images and removing the central point source to reveal the host structure. We confirm that more luminous QSO nuclei are found in more luminous host galaxies. Using central black hole masses from the literature, we find that nuclear luminosity also generally increases with black hole mass, but it is not tightly correlated. Nuclear luminosities range from 2.3% to 200% of the Eddington limit. Those in elliptical hosts cover the range fairly evenly, while those in spirals are clustered near the Eddington limit. Using a principal components analysis, we find a kind of fundamental plane relating the nuclear luminosity to the size and effective surface magnitude of the bulge. Using optical nuclear luminosity, this relationship explains 96.1% of the variance in the overall sample, while another version of the relationship uses x-ray nuclear luminosity and explains 95.2% of the variance. The form of this QSO fundamental plane shows similarities to the well-studied fundamental plane of elliptical galaxies, and we examine the possible relationship between them as well as the difficulties involved in establishing this connection.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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