On the neutral gas content and environment of NGC 3109 and the Antlia dwarf galaxy

被引:39
作者
Barnes, DG
de Blok, WJG
机构
[1] Swinburne Univ Technol, Ctr Astrophys & Supercomp, Hawthorn, Vic 3122, Australia
[2] CSIRO, Australia Telescope Natl Facil, Epping, NSW 1710, Australia
关键词
galaxies : individual (Antlia dwarf; NGC; 3109); galaxies : interactions; Local Group;
D O I
10.1086/321170
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
As part of a continuing survey of nearby galaxies, we have mapped the neutral gas content of the low surface brightness Magellanic-type galaxy NGC 3109 and its environment, including the Antlia dwarf galaxy, at unprecedented velocity resolution and brightness sensitivity. The H I mass of NGC 3109 is measured to be 3.8 +/- 0.5 x 10(8) M-.. A substantial warp in the disk of NGC 3109 is detected in the H I emission image in the form of an extended low surface brightness feature. We report a positive detection in H I of the nearby Antlia dwarf galaxy and measure its total neutral gas mass to be 6.8 +/- 1.4 x 10(5) M-.. We show the warp in NGC 3109 to lie at exactly the same radial velocity as the gas in the Antlia dwarf galaxy and speculate that Antlia disturbed the disk of NGC 3109 during a mild encounter similar to1 Gyr in the past. H I data for a further eight galaxies detected in the background are presented.
引用
收藏
页码:825 / 829
页数:5
相关论文
共 43 条
[1]   The nature of the Antlia galaxy: A new dwarf irregular in the outskirts of the local group [J].
Aparicio, A ;
Dalcanton, JJ ;
Gallart, C ;
MartinezDelgado, D .
ASTRONOMICAL JOURNAL, 1997, 114 (04) :1447-1457
[2]   ATLAS OF PECULIAR GALAXIES [J].
ARP, H .
ASTROPHYSICAL JOURNAL, 1966, S 14 :1-&
[3]   The HI Parkes All Sky Survey:: southern observations, calibration and robust imaging [J].
Barnes, DG ;
Staveley-Smith, L ;
de Blok, WJG ;
Oosterloo, T ;
Stewart, IM ;
Wright, AE ;
Banks, GD ;
Bhathal, R ;
Boyce, PJ ;
Calabretta, MR ;
Disney, MJ ;
Drinkwater, MJ ;
Ekers, RD ;
Freeman, KC ;
Gibson, BK ;
Green, AJ ;
Haynes, RF ;
Hekkert, PTL ;
Henning, PA ;
Jerjen, B ;
Juraszek, S ;
Kesteven, MJ ;
Kilborn, VA ;
Knezek, PM ;
Koribalski, B ;
Kraan-Korteweg, RC ;
Malin, DE ;
Marquarding, M ;
Minchin, RF ;
Mould, JR ;
Price, RM ;
Putman, ME ;
Ryder, SD ;
Sadler, EM ;
Schröder, A ;
Stootman, F ;
Webster, RL ;
Wilson, WE ;
Ye, T .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2001, 322 (03) :486-498
[4]   Gas-rich dwarf spheroidals [J].
Blitz, L ;
Robishaw, T .
ASTROPHYSICAL JOURNAL, 2000, 541 (02) :675-687
[5]   ON THE CEPHEID VARIABLES OF THE NEARBY IRREGULAR GALAXY NGC-3109 [J].
CAPACCIOLI, M ;
PIOTTO, G ;
BRESOLIN, F .
ASTRONOMICAL JOURNAL, 1992, 103 (04) :1151-1158
[7]   SHARP H-1 EDGES IN THE OUTSKIRTS OF DISK GALAXIES [J].
CORBELLI, E ;
SALPETER, EE .
ASTROPHYSICAL JOURNAL, 1993, 419 (01) :104-110
[8]   The morphology of nearby low surface brightness galaxies [J].
de Blok, E ;
Walter, F ;
Bell, E .
ASTROPHYSICS AND SPACE SCIENCE, 1999, 269 (0) :101-108
[9]   Evidence for tidal interaction and a supergiant HI shell in the local group dwarf galaxy NGC 6822 [J].
de Blok, WJG ;
Walter, F .
ASTROPHYSICAL JOURNAL, 2000, 537 (02) :L95-L98
[10]   INTEGRATED NEUTRAL HYDROGEN PROPERTIES OF NEARBY GALAXIES [J].
DEAN, JF ;
DAVIES, RD .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1975, 170 (03) :503-518