在1.5<z<3处的超铝红外线星系占据了质量约为6 × 10^13太阳质量的暗物质晕
Ultraluminous Infrared Galaxies at 1.5<z<3 occupy dark matter haloes of mass ~6x10^13 solar masses
摘要：
本文给出了在1.5<z<2.0和2<z<3两个红移区间内超亮红外星系空间成团的测量结果。这两个样本都非常强烈地聚集在一起，2<z<3样本的r_0=14.40+/-1.99 h^-1 Mpc，1.5<z<2.0样本的r_0=9.40+/-2.24 h^-1 Mpc，使它们成为这些时期最有偏差的星系之一。这些聚集幅度与存在于质量约为6 × 10^13太阳质量的暗物质晕中的两个种群是一致的。我们推断，一个最小的暗物质晕质量是一个重要的因素，所有形式的发光，模糊的活动在星系在z>1。采用合理的模型来描述具有红移的DM晕的增长，那么拥有2<z<3样本的晕将可能拥有z=0时最丰富的星系团，而拥有1.5<z<2.0样本的晕将可能拥有z=0时从贫到富的星系团。
英文摘要：
We present measurements of the spatial clustering of ultraluminous infrared galaxies in two redshift intervals, 1.5<z<2.0 and 2<z<3. Both samples cluster strongly, with r_0=14.40+/-1.99 h^-1 Mpc for the 2<z<3 sample, and r_0=9.40+/-2.24 h^-1 Mpc for the 1.5<z<2.0 sample, making them among the most biased galaxies at these epochs. These clustering amplitudes are consistent with both populations residing in dark matter haloes with masses of ~6x10^13 solar masses. We infer that a minimum dark matter halo mass is an important factor for all forms of luminous, obscured activity in galaxies at z>1. Adopting plausible models for the growth of DM haloes with redshift, then the haloes hosting the 2<z<3 sample will likely host the richest clusters of galaxies at z=0, whereas the haloes hosting the 1.5<z<2.0 sample will likely host poor to rich clusters at z=0.
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