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The Filamentary Large Scale Structure around the z = 2.16 Radio Galaxy PKS 1138-262

Steve Croft·Jaron Kurk·Wil van Breugel·S. A. Stanford·Wim de Vries·Laura Pentericci·Huub Rottgering
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Abstract

PKS 1138-262 is a massive radio galaxy at z = 2.16 surrounded by overdensities of Lya emitters, Ha emitters, EROs 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 et al. (2002) 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 AGN) 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 AGN, and three are M-dwarf stars.

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Steve Croft, Jaron Kurk, Wil van Breugel, S. A. Stanford, Wim de Vries, Laura Pentericci, Huub Rottgering. 2005-05-17. The Filamentary Large Scale Structure around the z = 2.16 Radio Galaxy PKS 1138-262. https://doi.org/10.1086/431956

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