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arxiv: astro-ph/0005058 · v1 · submitted 2000-05-03 · 🌌 astro-ph

Search for clusters at high redshift - I. Candidate Lya emitters near 1138-262 at z=2.2

J.D. Kurk , H.J.A. Rottgering , L. Pentericci , G.K. Miley , W. van Breugel , C.L. Carilli , H. Ford , T. Heckman
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P. McCarthy A. Moorwood
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classification 🌌 astro-ph
keywords galaxyclusterradiobandcandidatecenterformingobjects
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Radio, optical and X-ray observations of the powerful radio galaxy PKS 1138-262 at z=2.156 have suggested that this galaxy is a massive galaxy in the center of a forming cluster. We have imaged 1138-262 and the surrounding 38 square arcminute field with the Very Large Telescope in a broad band and a narrow band encompassing the redshifted Lya emission. We detect 50 objects with rest equivalent width larger than 20 A and a luminous, highly extended Lya halo around 1138-262. If the radio galaxy is at the center of a forming cluster, these objects are candidate Lya emitting cluster galaxies.

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