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26 April 2024 |
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An X-ray Cluster at Redshift 2.156? | | C.L. Carilli
; D.E. Harris
; L. Pentericci
; H.J.A. Rottgering
; G.K. Miley
; M.N. Bremer
; | | Date: |
18 Dec 1997 | | Journal: | Astrophys.J. 494 (1998) L143; Erratum-ibid. 496 (1998) 57 | | Subject: | astro-ph | | Affiliation: | NRAO), D.E. Harris (SAO), L. Pentericci, H.J.A. Rottgering, G.K. Miley, and M.N. Bremer (Leiden | | Abstract: | We present X-ray observations of the narrow line radio galaxy 1138-262 at z = 2.156 with the High Resolution Imager (HRI) on ROSAT. Observations at other wave-bands, and in particular extremely high values of Faraday rotation of the polarized radio emission, suggest that the 1138-262 radio source is in a dense environment, perhaps a hot, cluster-type atmosphere. We detect X-ray emission from the vicinity of 1138-262, and we discuss possible origins for this emission. The X-ray, optical, and radio data all favor thermal emission from a hot cluster atmosphere as the mechanism responsible for the X-rays, although we cannot rule out a contribution from the active nucleus. If this interpretation is correct, then 1138-262 becomes the most distant, by far, of known X-ray emitting clusters. The X-ray luminosity for 1138-262 is 6.7+/-1.3 x 10**44 ergs/sec for emitted energies between 2 keV and 10 keV. | | Source: | arXiv, astro-ph/9712253 | | Services: | Forum | Review | PDF | Favorites | |
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