The filamentary large-scale structure around the z=2.16 radio galaxy PKS 1138-262

被引：44
作者：
Croft, S
Kurk, J
van Breugel, W
Stanford, SA
de Vries, W
Pentericci, L
Röttgering, H
机构：
[1] Lawrence Livermore Natl Lab, Inst Geophys & Planetary Phys, Livermore, CA 94550 USA
[2] Osserv Astrofis Arcetri, INAF, I-50125 Florence, Italy
[3] Univ Calif Davis, Dept Phys, Davis, CA 95616 USA
[4] Univ Rome, Dipartimento Fis, Rome, Italy
[5] Leiden Observ, NL-2333 CA Leiden, Netherlands
来源：
ASTRONOMICAL JOURNAL | 2005年 / 130卷 / 03期
关键词：
galaxies : active; galaxies : high-redshift; galaxies : individual ( PKS 1138-262);
D O I：
10.1086/431956
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
PKS 1138-262 is a massive radio galaxy at z = 2.16 surrounded by overdensities of Ly alpha emitters, H alpha emitters, extremely red objects, and X-ray emitters. Numerous lines of evidence exist that it is located in a forming cluster. We report on Keck spectroscopy of candidate members of this protocluster, including nine of the 18 X-ray sources detected by Pentericci and coworkers in this field. Two of these X-ray sources ( not counting PKS 1138-262 itself) were previously confirmed to be members of the protocluster; we have discovered that an additional two ( both active galactic nuclei [AGNs]) are members of a filamentary structure at least 3.5 Mpc in projection aligned with the radio jet axis, the 150 kpc-sized emission-line halo, and the extended X-ray emission around the radio galaxy. Three of the nine X-ray sources observed are lower redshift AGNs, and three are M dwarf stars.
引用
收藏
页码：867 / 872
页数：6
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