Open AccessThe discovery of new galaxy members in the NGC 5044 and 1052 groups
Author(s) -
M N. P. F.,
Mundell C. G.,
Brough S.,
Forbes Duncan A.,
Barnes D. G.,
James P. A.,
Goudfrooij P.,
KozhurinaPlatais V.,
Whitaker R.
Publication year - 2004
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1111/j.1365-2966.2004.08007.x
Subject(s) - physics , astrophysics , galaxy group , galaxy , surface brightness , hubble sequence , star formation , local group , irregular galaxy , astronomy , telescope , dwarf galaxy , elliptical galaxy , lenticular galaxy
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.