Povilas Palunas et al. 2004 ApJ 602 545 doi:10.1086/381145
Povilas Palunas1, Harry I. Teplitz2, Paul J. Francis3,4, Gerard M. Williger5,6 and Bruce E. Woodgate5
Show affiliationsWe present the detection of 34 Lyα emission-line galaxy candidates in a 80 × 80 × 60 comoving Mpc region surrounding the known z = 2.38 galaxy cluster J2143-4423. The space density of Lyα emitters is comparable to that found by Steidel et al. when targeting a cluster at redshift 3.09, which is a factor of 5.8 ± 2.5 greater than that found by field samples at similar redshifts. The distribution of these galaxy candidates contains several 5-10 Mpc scale voids. We compare our observations with mock catalogs derived from the VIRGO consortium ΛCDM n-body simulations. Fewer than 1% of the mock catalogs contain voids as large as we observe. Our observations thus tentatively suggest that the galaxy distribution at redshift 2.38 contains larger voids than predicted by current models. Three of the candidate galaxies and one previously discovered galaxy have the large luminosities and extended morphologies of "Lyα blobs."
cosmology: observations; galaxies: evolution; galaxies: fundamental parameters
Issue 2 (2004 February 20)
Received 2003 August 25, accepted for publication 2003 October 21
Povilas Palunas et al. 2004 ApJ 602 545
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