2010/09/10 by Robert Minchin, R. F. Minchin, E. Momjian +16
Physics and Astronomy · #Astronomy #Astronomy and Astrophysical Research #Astrophysics #Barred spiral galaxy #Dwarf galaxy #Dwarf spheroidal galaxy #Galaxies: Formation, Evolution, Phenomena #Galaxy #Galaxy group #Galaxy merger #Interacting galaxy #Irregular galaxy #Lenticular galaxy #Physics #Radio galaxy #Stellar, planetary, and galactic studies #astro-ph.CO
paper · pdf · doi:10.1088/0004-6256/140/4/1093
published as AJ, 140, 1093 (2010) · 18 pages, 17 figures, uses emulateapj
openalex publication_date 2010/09/10 · arxiv created 2010/09/22 · arxiv updated 2015/05/20 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Two 5 deg 2 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.