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26 April 2024 |
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Uncovering High-z Clusters Using Wide-Angle Tailed Radio Sources | | E. L. Blanton
; M. D. Gregg
; D. J. Helfand
; R. H. Becker
; R. L. White
; | | Date: |
25 Mar 2003 | | Subject: | astro-ph | | Affiliation: | 1,2), M. D. Gregg , D. J. Helfand , R. H. Becker , R. L. White ( U. Virginia, Chandra Fellow, UC Davis and IGPP/LLNL, Columbia U., STScI | | Abstract: | The morphologies of wide-angle tailed (WAT) radio sources (edge-darkened, C-shaped, FR I radio sources) are the result of confinement and distortion of the radio lobes by the dense X-ray-emitting gas in clusters or groups of galaxies. These radio sources are easily seen at high redshifts (z~1) in short-exposure images from the Faint Images of the Radio Sky at Twenty-cm (FIRST) survey. Using a sample of approximately 400 WAT sources from the FIRST survey, we have discovered a number of high-z clusters. Here, we present the highest-z cluster found so far using this method: 1137+3000 at z=0.96. We include photometric and spectroscopic results. Ten galaxies are confirmed at the cluster redshift, with a line-of-sight velocity dispersion of 530 +190/-90 km/s, typical of an Abell richness class 0 cluster. | | Source: | arXiv, astro-ph/0303554 | | Services: | Forum | Review | PDF | Favorites | |
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