The Arecibo Galaxy Environment Survey. III. Observations Toward the Galaxy Pair NGC 7332/7339 and the Isolated Galaxy NGC 1156
Abstract
Two 5 deg2 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 (H I) with the Arecibo L-band Feed Array out to a redshift of ~0.065 (~20,000 km s-1) 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%) were previously cataloged and 15 (17%) have prior redshifts. Two dwarf galaxies have been discovered in the NGC 7332 group and a single dwarf galaxy in the vicinity of NGC 1156. A parallel optical search of the area revealed one further possible dwarf galaxy near NGC 7332.
- Publication:
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The Astronomical Journal
- Pub Date:
- October 2010
- DOI:
- arXiv:
- arXiv:1009.4438
- Bibcode:
- 2010AJ....140.1093M
- Keywords:
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- galaxies: individual: NGC 7332 NGC 7339;
- radio lines: galaxies;
- surveys;
- Astrophysics - Cosmology and Nongalactic Astrophysics
- E-Print:
- 18 pages, 17 figures, uses emulateapj