Radio Identification of Submillimeter Sources in the Hubble Deep Field
Author(s) -
E. A. Richards
Publication year - 1999
Publication title -
the astrophysical journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.376
H-Index - 489
eISSN - 1538-4357
pISSN - 0004-637X
DOI - 10.1086/311905
Subject(s) - physics , james clerk maxwell telescope , astronomy , galaxy , astrophysics , hubble deep field , redshift , observational cosmology , star formation , population , cosmology , luminous infrared galaxy , galaxy formation and evolution , demography , sociology
Determination of the epoch dependent star-formation rate of field galaxies isone of the principal goals of modern observational cosmology. Recently, Hugheset al. (1998) using the SCUBA instrument on the James Clerk Maxwell Telescope,report the detection of a new population of heavily dust enshrouded,star-forming galaxies at high redshifts (z > 2), dramatically altering thepicture of galaxy evolution. However, we show that this interpretation must betreated with caution because of ambiguities in the identification of the hostgalaxies. Based on our deep, high resolution 1.4 GHz obervations of the HubbleDeep Field, we suggest alternate identifications to the sub-mm detections.These identifications argue for a substantially lower redshift to the sub-mmpopulation with a consequential lowering of the z > 2 sub-mm/far infraredluminosity density and global star-formation rate.
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