Hostname: page-component-586b7cd67f-dlnhk Total loading time: 0 Render date: 2024-11-23T20:54:05.119Z Has data issue: false hasContentIssue false

AAT/WFI Observations of the Extragalactic HI Cloud HIPASS J1712-64

Published online by Cambridge University Press:  05 March 2013

Geraint F. Lewis
Affiliation:
Anglo-Australian Observatory, PO Box 296, Epping, NSW 1710, Australia; [email protected]
Michael J. Irwin
Affiliation:
Institute of Astronomy, Madingley Rd, Cambridge, CB3 0HA, UK; [email protected]
Rodrigo A. Ibata
Affiliation:
Observatoire de Strabourg, 11, rue de l'Universite, F-67000, Strasbourg, France; [email protected]
Brad K. Gibson
Affiliation:
Centre for Astrophysics & Supercomputing, Swinburne University, PO Box 218, Hawthorn, Victoria 3122, Australia; [email protected]
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

AAT/WFI optical images of a candidate extragalactic HI cloud, HIPASS J1712–64, are presented. The g and r band CCD mosaic camera frames were processed using a new data pipeline recently installed at the AAO. The resultant stacked images reach significantly deeper levels than those of previous published optical imaging of this candidate, providing a detection limit Mg ˜ −7 at a distance of 3 Mpc, the inferred distance to HIPASS J1712–64. However, detailed analysis of the images fails to uncover any stellar population associated with the HI emission. If this system is a member of the Local Group then it is pathologically different to other members. Hence, our observations reinforce earlier suggestions that this HI cloud is most likely Galactic in origin and not a Local Volume dwarf galaxy.

Type
Research Article
Copyright
Copyright © Astronomical Society of Australia 2002

References

Blitz, L., Spergel, D. N., Teuben, P. J., Hartmann, D., & Burton, W. B. 1999, ApJ, 514, 818 Google Scholar
Braun, R., & Burton, W. B. 1999, A&A, 341, 437 Google Scholar
Irwin, M., & Lewis, J. 2001, NewAR, 45, 105 Google Scholar
Kilborn, V. A., et al. 2000, AJ, 120, 1342 CrossRefGoogle Scholar
Klypin, A., Kravtsov, A. V., Valenzuela, O., & Prada, F. 1999, ApJ, 522, 82 Google Scholar
Putman, M. E., et al. 2002, AJ, in pressGoogle Scholar
Schlegel, D. J., Finkbeiner, D. P., & Davis, M. 1998, ApJ, 500, 525 Google Scholar
Sembach, K. R., Gibson, B. K., Fenner, Y., & Putman, M. E. 2002, ApJ, in pressGoogle Scholar
Simon, J. D., & Blitz, L. 2002, ApJ, in pressGoogle Scholar
Staveley-Smith, L., et al. 1998, AJ, 116, 2717 Google Scholar
Tinney, C. G. 2001, AAO Newsletter, 96, 14 Google Scholar