Hipass detection of an intergalactic gas cloud in the NGC 2442 group

被引：58

作者：

Ryder, SD

Koribalski, B

Staveley-Smith, L

Kilborn, VA

Malin, DF

Banks, GD

Barnes, DG

Bhatal, R

de Blok, WJG

Boyce, PJ

Disney, MJ

Drinkwater, MJ

Ekers, RD

Freeman, KC

Gibson, BK

Henning, PA

Jerjen, H

Knezek, PM

Marquarding, M

Minchin, RF

Mould, JR

Oosterloo, T

Price, RM

Putman, ME

Sadler, EM

Stewart, I

Stootman, F

Webster, RL

Wright, AE

机构：

[1] Anglo Australian Observ, Epping, NSW 1710, Australia

[2] CSIRO, Australia Telescope Natl Facil, Epping, NSW 1710, Australia

[3] Univ Melbourne, Sch Phys, Melbourne, Vic 3010, Australia

[4] Univ Wales, Dept Phys & Astron, Cardiff CF2 3YB, S Glam, Wales

[5] Swinburne Univ Technol, Ctr Astrophys & Supercomp, Hawthorn, Vic 3122, Australia

[6] Univ Western Sydney Macarthur, Dept Phys, Campbelltown, NSW 2560, Australia

[7] Mt Stromlo & Siding Spring Observ, Res Sch Astron & Astrophys, Weston, ACT 2611, Australia

[8] Univ New Mexico, Dept Phys & Astron, Albuquerque, NM 87131 USA

[9] Space Telescope Sci Inst, Baltimore, MD 21218 USA

[10] ASTRON, NL-7990 AA Dwingeloo, Netherlands

[11] Univ Sydney, Sch Phys A28, Sydney, NSW 2006, Australia

[12] Univ Leicester, Dept Phys & Astron, Xray Astron Grp, Leicester LE1 7RH, Leics, England

来源：

ASTROPHYSICAL JOURNAL | 2001年 / 555卷 / 01期

关键词：

galaxies : individual (NGC 2442); galaxies : interactions; galaxies : intergalactic medium; radio lines : galaxies;

D O I：

10.1086/321453

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report the discovery from the H I Parkes All-Sky Survey (HIPASS) of a gas cloud associated with the asymmetric spiral galaxy NGC 2442. This object, designated HIPASS J0731-69, contains similar to 10(9) M-. of H I, or nearly one-third as much atomic gas as NGC 2442 itself. No optical counterpart to any part of HIPASS J0731-69 has yet been identified, consistent with the gas being diffuse and its streamlike kinematics. If the gas in HIPASS J0731-69 was once part of NGC 2442, then it was most likely a fairly recent tidal encounter with a moderately massive companion that tore it loose, although the possibility of ram-pressure stripping cannot be ruled out. This discovery highlights the potential of the HIPASS data for yielding new clues to the nature of some of the best-known galaxies in the local universe.

引用

页码：232 / 239

页数：8

共 44 条

[1]

BAJAJA E, 1995, ASTRON ASTROPHYS SUP, V114, P147

[2] Spectroscopic observations of southern nearby galaxies I.: NGC 2442 [J].

Bajaja, E ;

Agüero, E ;

Paolantonio, S .

ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES, 1999, 136 (01) :179-187

[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] The Smith cloud: H I associated with the Sgr dwarf? [J].

Bland-Hawthorn, J ;

Veilleux, S ;

Cecil, GN ;

Putman, ME ;

Gibson, BK ;

Maloney, PR .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1998, 299 (02) :611-624

[5]

BOSELLI A, 1994, ASTRON ASTROPHYS, V285, P69

[6] DISCOVERY OF A HUGE LOW-SURFACE-BRIGHTNESS GALAXY - A PROTODISK GALAXY AT LOW REDSHIFT [J].

BOTHUN, GD ;

IMPEY, CD ;

MALIN, DF ;

MOULD, JR .

ASTRONOMICAL JOURNAL, 1987, 94 (01) :23-&

[7] VLA OBSERVATIONS OF H-I-1225+01 [J].

CHENGALUR, JN ;

GIOVANELLI, R ;

HAYNES, MP .

ASTRONOMICAL JOURNAL, 1995, 109 (06) :2415-2427

[8]

COMBES F, 1988, ASTRON ASTROPHYS, V203, pL9

[9] DIFFUSE HOT GAS IN THE NGC-4261 GROUP OF GALAXIES [J].

DAVIS, DS ;

MUSHOTZKY, RF ;

MULCHAEY, JS ;

WORRALL, DM ;

BIRKINSHAW, M ;

BURSTEIN, D .

ASTROPHYSICAL JOURNAL, 1995, 444 (02) :582-589

[10]

deVaucouleurs G., 1991, Third Reference Catalogue of Bright Galaxies. Volume I: Explanations and References, DOI DOI 10.1007/978-1-4757-4360-9

← 1 2 3 4 5 →