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25 April 2024

» arxiv » 1009.4438

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The Arecibo Galaxy Environment Survey III: Observations Toward the Galaxy Pair NGC 7332/7339 and the Isolated Galaxy NGC 1156
R. F. Minchin ; E. Momjian ; R. Auld ; J. I. Davies ; D. Valls-Gabaud ; I. D. Karachentsev ; P. A. Henning ; K. L. O'Neil ; S. Schneider ; M. W. L. Smith ; M. D. Stage ; R. Taylor ; W. van Driel ;
Date:	22 Sep 2010
Abstract:	Two 5 square degree regions around the NGC 7332/9 galaxy pair and the isolated galaxy NGC 1156 have been mapped in the 21-cm line of neutral hydrogen (HI) with the Arecibo L-band Feed Array out to a redshift of ~0.065$ (~20,000$ km/s) as part of the Arecibo Galaxy Environment Survey. One of the aims of this survey is to investigate the environment of galaxies by identifying dwarf companions and interaction remnants; both of these areas provide the potential for such discoveries. The neutral hydrogen observations were complemented by optical and radio follow-up observations with a number of telescopes. A total of 87 galaxies were found, of which 39 (45 per cent) were previously cataloged and 15 (17 per cent) have prior redshifts. Two dwarf galaxies have been discovered in the NGC 7332 group and a single dwarf galaxy in the vicinity NGC 1156 . A parallel optical search of the area revealed one further possible dwarf galaxy near NGC 7332.
Source:	arXiv, 1009.4438
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