arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1502.07418astro-ph.GA
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一个超亮类星体,有一个120亿太阳质量的黑洞,红移6.30

An ultra-luminous quasar with a twelve-billion-solar-mass black hole at redshift 6.30

Xue-Bing Wu, Feige Wang, Xiaohui Fan, Weimin Yi, Wenwen Zuo, Fuyan Bian, Linhua Jiang, Ian D. McGreer, Ran Wang, Jinyi Yang, Qian Yang, David Thompson, Yuri Beletsky

摘要:

到目前为止,已经发现了大约40个红移大于z=6的类星体。每个类星体都包含一个质量约为十亿太阳质量($10^9 M_\odot$)的黑洞。当宇宙年龄小于10亿年时,这种黑洞的存在对黑洞的形成和生长以及黑洞和星系的共同进化理论提出了实质性的挑战。在这里,我们报告发现了一个超亮类星体,SDSS J010013.02+280225.8,红移z=6.30。它的光学和近红外光度是先前已知的z>6类星体的几倍。根据光谱中Ly $α$发射线蓝色一侧的深吸收槽,我们估计与该类星体相关的电离邻近区的适当大小为2600万光年,比其他z>6.1的低光度类星体大。我们估计(在近红外光谱的基础上),该黑洞的质量为$\sim 1.2 \times 10^{10} M_\odot$,这是一致的$1.3 \times 10^{10} M_\odot$通过假设爱丁顿限制吸积率。

英文摘要:

So far, roughly 40 quasars with redshifts greater than z=6 have been discovered. Each quasar contains a black hole with a mass of about one billion solar masses ($10^9 M_\odot$). The existence of such black holes when the Universe was less than 1 billion years old presents substantial challenges to theories of the formation and growth of black holes and the coevolution of black holes and galaxies. Here we report the discovery of an ultra-luminous quasar, SDSS J010013.02+280225.8, at redshift z=6.30. It has an optical and near-infrared luminosity a few times greater than those of previously known z>6 quasars. On the basis of the deep absorption trough on the blue side of the Ly $α$ emission line in the spectrum, we estimate the proper size of the ionized proximity zone associated with the quasar to be 26 million light years, larger than found with other z>6.1 quasars with lower luminosities. We estimate (on the basis of a near-infrared spectrum) that the black hole has a mass of $\sim 1.2 \times 10^{10} M_\odot$, which is consistent with the $1.3 \times 10^{10} M_\odot$ derived by assuming an Eddington-limited accretion rate.

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