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

S. D. Ryder; B. Koribalski; L. Staveley-Smith; V. A. Kilborn; D. F. Malin; G. D. Banks; D. G. Barnes; R. Bhatal; W. J.G. De Blok; P. J. Boyce; M. J. Disney; M. J. Drinkwater; R. D. Ekers; K. C. Freeman; B. K. Gibson; P. A. Henning; H. Jerjen; P. M. Knezek; M. Marquarding; R. F. Minchin; J. R. Mould; T. Oosterloo; R. M. Price; M. E. Putman; E. M. Sadler; I. Stewart; F. Stootman; R. L. Webster; A. E. Wright

doi:10.1086/321453

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

S. D. Ryder, B. Koribalski, L. Staveley-Smith, V. A. Kilborn, D. F. Malin, G. D. Banks, D. G. Barnes, R. Bhatal, W. J.G. De Blok, P. J. Boyce, M. J. Disney, M. J. Drinkwater, R. D. Ekers, K. C. Freeman, B. K. Gibson, P. A. Henning, H. Jerjen, P. M. Knezek, M. Marquarding, R. F. MinchinJ. R. Mould, T. Oosterloo, R. M. Price, M. E. Putman, E. M. Sadler, I. Stewart, F. Stootman, R. L. Webster, A. E. Wright

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Abstract

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 ∼10⁹ 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.

Original language	English
Pages (from-to)	232-239
Number of pages	8
Journal	The Astrophysical Journal
Volume	555
Issue number	1 PART 1
DOIs	https://doi.org/10.1086/321453
Publication status	Published - 1 Jul 2001
Externally published	Yes

Keywords

Galaxies : intergalactic medium
Galaxies: individual (NGC 2442)
Galaxies: interactions
Radio lines : galaxies

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Ryder, S. D., Koribalski, B., Staveley-Smith, L., Kilborn, V. A., Malin, D. F., Banks, G. D., Barnes, D. G., Bhatal, R., De Blok, W. J. G., Boyce, P. J., Disney, M. J., Drinkwater, M. J., Ekers, R. D., Freeman, K. C., Gibson, B. K., Henning, P. A., Jerjen, H., Knezek, P. M., Marquarding, M., ... Wright, A. E. (2001). HIPASS detection of an intergalactic gas cloud in the NGC 2442 group. The Astrophysical Journal, 555(1 PART 1), 232-239. https://doi.org/10.1086/321453

@article{55f38d68098345e49abe9ac7b4769cdd,

title = "HIPASS detection of an intergalactic gas cloud in the NGC 2442 group",

abstract = "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 ∼109 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.",

keywords = "Galaxies : intergalactic medium, Galaxies: individual (NGC 2442), Galaxies: interactions, Radio lines : galaxies",

author = "Ryder, {S. D.} and B. Koribalski and L. Staveley-Smith and Kilborn, {V. A.} and Malin, {D. F.} and Banks, {G. D.} and Barnes, {D. G.} and R. Bhatal and {De Blok}, {W. J.G.} and Boyce, {P. J.} and Disney, {M. J.} and Drinkwater, {M. J.} and Ekers, {R. D.} and Freeman, {K. C.} and Gibson, {B. K.} and Henning, {P. A.} and H. Jerjen and Knezek, {P. M.} and M. Marquarding and Minchin, {R. F.} and Mould, {J. R.} and T. Oosterloo and Price, {R. M.} and Putman, {M. E.} and Sadler, {E. M.} and I. Stewart and F. Stootman and Webster, {R. L.} and Wright, {A. E.}",

year = "2001",

month = jul,

day = "1",

doi = "10.1086/321453",

language = "English",

volume = "555",

pages = "232--239",

journal = "The Astrophysical Journal",

issn = "0004-637X",

publisher = "IOP Publishing",

number = "1 PART 1",

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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 2001, 'HIPASS detection of an intergalactic gas cloud in the NGC 2442 group', The Astrophysical Journal, vol. 555, no. 1 PART 1, pp. 232-239. https://doi.org/10.1086/321453

TY - JOUR

T1 - HIPASS detection of an intergalactic gas cloud in the NGC 2442 group

AU - Ryder, S. D.

AU - Koribalski, B.

AU - Staveley-Smith, L.

AU - Kilborn, V. A.

AU - Malin, D. F.

AU - Banks, G. D.

AU - Barnes, D. G.

AU - Bhatal, R.

AU - De Blok, W. J.G.

AU - Boyce, P. J.

AU - Disney, M. J.

AU - Drinkwater, M. J.

AU - Ekers, R. D.

AU - Freeman, K. C.

AU - Gibson, B. K.

AU - Henning, P. A.

AU - Jerjen, H.

AU - Knezek, P. M.

AU - Marquarding, M.

AU - Minchin, R. F.

AU - Mould, J. R.

AU - Oosterloo, T.

AU - Price, R. M.

AU - Putman, M. E.

AU - Sadler, E. M.

AU - Stewart, I.

AU - Stootman, F.

AU - Webster, R. L.

AU - Wright, A. E.

PY - 2001/7/1

Y1 - 2001/7/1

N2 - 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 ∼109 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.

AB - 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 ∼109 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.

KW - Galaxies : intergalactic medium

KW - Galaxies: individual (NGC 2442)

KW - Galaxies: interactions

KW - Radio lines : galaxies

UR - http://www.scopus.com/inward/record.url?scp=0035402482&partnerID=8YFLogxK

U2 - 10.1086/321453

DO - 10.1086/321453

M3 - Article

AN - SCOPUS:0035402482

SN - 0004-637X

VL - 555

SP - 232

EP - 239

JO - The Astrophysical Journal

JF - The Astrophysical Journal

IS - 1 PART 1

ER -

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

Abstract

Keywords

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