2004/05/12 by N. P. F. McKay, C. G. Mundell, Sarah Brough +11 · 14 citations
Physics and Astronomy · #Astronomy #Astrophysical Phenomena and Observations #Astrophysics #Dwarf galaxy #Elliptical galaxy #Galaxies: Formation, Evolution, Phenomena #Galaxy #Galaxy group #Hubble sequence #Irregular galaxy #Lenticular galaxy #Local Group #Physics #Star formation #Stellar, planetary, and galactic studies #Surface brightness #Telescope #astro-ph
paper · pdf · doi:10.1111/j.1365-2966.2004.08007.x
published in Monthly Notices of the Royal Astronomical Society 352(4), 1121-1134 (Oxford University Press) · Accepted for publication in MNRAS. 21 pages, 13 figures. Also available with high-resolution figures at http://www.astro.livjm.ac.uk/~npfm/Papers/mmb04.ps.gz
arxiv created 2004/05/12 · openalex publication_date 2004/08/01 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We present the results of neutral hydrogen (H i) observations of the NGC 5044 and NGC 1052 groups, as part of a GEMS (Group Evolution Multiwavelength Study) investigation into the formation and evolution of galaxies in nearby groups. Two new group members have been discovered during a wide-field H i imaging survey conducted using the ATNF Parkes telescope. These results, as well as those from follow-up H i synthesis and optical imaging, are presented here. J1320 − 1427, a new member of the NGC 5044 group, has an H i mass of and , with a radial velocity of v= 2750 km s−1. The optical galaxy is characterized by two regions of star formation, surrounded by an extended, diffuse halo. J0249−0806, the new member of the NGC 1052 group, has and v= 1450 km s−1. The optical image reveals a low-surface-brightness galaxy. We interpret both of these galaxies as irregular type, with J0249 − 0806 possibly undergoing first infall into the NGC 1052 group.