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Discovery of six Ly alpha emitters near a radio galaxy at z ~ 5.2 | | B.P. Venemans
; H.J.A. Rottgering
; R.A. Overzier
; G.K. Miley
; C. De Breuck
; J.D. Kurk
; W. van Breugel
; C.L. Carilli
; H. Ford
; T. Heckman
; P. McCarthy
; L. Pentericci
; | | Date: |
27 Aug 2004 | | Journal: | Astron.Astrophys. 424 (2004) L17-L20 | | Subject: | astro-ph | | Affiliation: | Leiden Observatory), C. De Breuck (ESO), J.D. Kurk (Osservatorio Astrofisico di Arcetri, Firenze), W. van Breugel (IGPP/LLNL), C.L. Carilli (NRAO), H. Ford, T. Heckman (JHU), P. McCarthy (Carnegie Observatories), L. Pentericci (Dipartimento di Fisica, | | Abstract: | We present the results of narrow-band and broad-band imaging with the Very Large Telescope of the field surrounding the radio galaxy TN J0924-2201 at z = 5.2. Fourteen candidate Ly alpha emitters with a rest-frame equivalent width of > 20 A were detected. Spectroscopy of 8 of these objects showed that 6 have redshifts similar to that of the radio galaxy. The density of emitters at the redshift of the radio galaxy is estimated to be a factor 1.5-6.2 higher than in the field, and comparable to the density of Ly alpha emitters in radio galaxy protoclusters at z = 4.1, 3.1 and 2.2. The Ly alpha emitters near TN J0924-2201 could therefore be part of a structure that will evolve into a massive cluster. These observations confirm that substantial clustering of Ly alpha emitters occurs at z > 5 and support the idea that radio galaxies pinpoint high density regions in the early Universe. | | Source: | arXiv, astro-ph/0408520 | | Services: | Forum | Review | PDF | Favorites | |
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