TY - JOUR
T1 - The discovery of new galaxy members in the NGC 5044 and 1052 groups
AU - McKay, N. P.F.
AU - Mundell, C. G.
AU - Brough, S.
AU - Forbes, Duncan A.
AU - Barnes, D. G.
AU - James, P. A.
AU - Goudfrooij, P.
AU - Kozhurina-Platais, V.
AU - Whitaker, R.
PY - 2004/8/21
Y1 - 2004/8/21
N2 - We present the results of neutral hydrogen (HI) observations of the NGC 5044 and NGC 1052 groups, as part of a GEMS (Group Evolution Multiwave-length Study) investigation into the formation and evolution of galaxies in nearby groups. Two new group members have been discovered during a wide-field Hi imaging survey conducted using the ATNF Parkes telescope. These results, as well as those from follow-up HI synthesis and optical imaging, are presented here. J1320 - 1427, a new member of the NGC 5044 group, has an HI mass of M HI = 1.05 × 10 9 M⊙ and M HI/L B = 1.65 M⊙/L⊙, 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 M HI =5.4 × 10 8 M⊙, M HI/L R = 1.13 M⊙/L⊙ and v = 1450 kms -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.
AB - We present the results of neutral hydrogen (HI) observations of the NGC 5044 and NGC 1052 groups, as part of a GEMS (Group Evolution Multiwave-length Study) investigation into the formation and evolution of galaxies in nearby groups. Two new group members have been discovered during a wide-field Hi imaging survey conducted using the ATNF Parkes telescope. These results, as well as those from follow-up HI synthesis and optical imaging, are presented here. J1320 - 1427, a new member of the NGC 5044 group, has an HI mass of M HI = 1.05 × 10 9 M⊙ and M HI/L B = 1.65 M⊙/L⊙, 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 M HI =5.4 × 10 8 M⊙, M HI/L R = 1.13 M⊙/L⊙ and v = 1450 kms -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.
KW - Galaxies: clusters: individual: NGC 1052
KW - Galaxies: clusters: individual: NGC 5044
KW - Radio lines: galaxies
UR - http://www.scopus.com/inward/record.url?scp=4344718544&partnerID=8YFLogxK
U2 - 10.1111/j.1365-2966.2004.08007.x
DO - 10.1111/j.1365-2966.2004.08007.x
M3 - Article
AN - SCOPUS:4344718544
SN - 0035-8711
VL - 352
SP - 1121
EP - 1134
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
IS - 4
ER -