Hostname: page-component-cd9895bd7-7cvxr Total loading time: 0 Render date: 2024-12-30T21:22:14.941Z Has data issue: false hasContentIssue false
  • English
  • Français

A Gaseous Group with Unusual Remote Star Formation

Published online by Cambridge University Press:  02 January 2013

N. Santiago-Figueroa ,
M. E. Putman ,
J. Werk ,
G. R. Meurer  and
E. Ryan-Weber
N. Santiago-Figueroa*
Affiliation:
Department of Physics, Fisk University, 1000 17th Ave N., Nashville, TN 37208, USA Department of Physics and Astronomy, Vanderbilt University, 6301 Stevenson Center, Nashville, TN 37235, USA Department of Astronomy, Columbia University, 550 West 120th Street, New York, NY 10027, USA
M. E. Putman
Affiliation:
Department of Astronomy, Columbia University, 550 West 120th Street, New York, NY 10027, USA
J. Werk
Affiliation:
Department of Astronomy and Astrophysics, UCO/Lick Observatory;University of California, 1156 High Street, Santa Cruz, CA 95064, USA
G. R. Meurer
Affiliation:
International Centre for Radio Astronomy Research, The University of Western Australia, M468, 35 Stirling Highway, Crawley, WA 6009, Australia
E. Ryan-Weber
Affiliation:
Centre for Astrophysics and Supercomputer, Swinburne University, PO Box 218, Hawthorn, Victoria 3122, Australia
*
GCorresponding author. Email: [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.

We present VLA 21-cm observations of the spiral galaxy ESO 481-G017 to determine the nature of remote star formation traced by an Hii region found 43 kpc and ∼800 km s−1 from the galaxy center (in projection). ESO 481-G017 is found to have a 120 kpc Hi disk with a mass of 1.2 × 1010M⊙ and UV GALEX images reveal spiral arms extending into the gaseous disk. Two dwarf galaxies with Hi masses close to 108M⊙ are detected at distances of ∼200 kpc from ESO 481-G017 and a Hi cloud with a mass of 6 × 107M⊙ is found near the position and velocity of the remote Hii region. The Hii region is somewhat offset from the Hi cloud spatially and there is no link to ESO 481-G017 or the dwarf galaxies. We consider several scenarios for the origin of the cloud and Hii region and find the most likely is a dwarf galaxy that is undergoing ram pressure stripping. The Hi mass of the cloud and Hi luminosity of the Hii region (1038.1 erg s−1) are consistent with dwarf galaxy properties, and the stripping can trigger the star formation as well as push the gas away from the stars.

Keywords

galaxies: ISMgalaxies: dwarfHii regionsISM: Hi
Type
Research Article
Information
Publications of the Astronomical Society of Australia , Volume 28 , Issue 3 , 2011 , pp. 271 - 279
Copyright
Copyright © Astronomical Society of Australia 2011

References

Asplund, M., 2005, ARA&A, 43, 481Google Scholar
Bekki, K., Koribalski, B. S. & Kilborn, V. A., 2005, MNRAS, 363, 21Google Scholar
Bell, E., McIntosh, D. H., Katz, N. & Weinberg, M. D., 2003, ApJS, 149, 289CrossRefGoogle Scholar
Bigiel, F., Leroy, A., Seibert, M., Walter, F., Blitz, L., Thilker, D. & Madore, B., 2010, ApJ, 720, L31CrossRefGoogle Scholar
Boquien, M., Duc, P. A., Braine, J., Brinks, E., Lisenfeld, U. & Charmandaris, V., 2007, A&A, 467, 93Google Scholar
Boquien, M. et al. , 2009, AJ, 137, 4561CrossRefGoogle Scholar
Bournaud, F. & Duc, P.-A., 2006, A&A, 456, 481Google Scholar
Crowl, H., Kenney, J., van Gorkom, J. & Vollmer, B., 2005, AJ, 130, 65CrossRefGoogle Scholar
de Vaucouleurs, G., de Vaucouleurs, A., Corwin, H. G. Jr, Buta, R. J., Paturel, G. & Fouque, P., 1991, Third Reference Catalogue of V. Bright Galaxies 1–3, Springer-Verlag, New YorkGoogle Scholar
Donley, J. L., Koribalski, B. S., Staveley-Smith, L., Kraan-Korteweg, R. C., Schröder, A. & Henning, P. A., 2006, MNRAS, 369, 1741Google Scholar
Duc, P.-A. & Bournaud, F., 2008, ApJ, 673, 787CrossRefGoogle Scholar
Duc, P.-A. & Mirabel, I. F., 1994, A&A, 289, 83Google Scholar
Ferguson, A. M. N., Gallagher, J. S. & Wyse, R. F. G., 1998, AJ, 116, 673CrossRefGoogle Scholar
Gil de Paz, A. et al. , 2007, ApJ, 661, 115CrossRefGoogle Scholar
Grcevich, J. & Putman, M., 2009, ApJ, 111, 222Google Scholar
Haynes, M. P., Giovanelli, R. & Kent, B. K., 2007, ApJ, 665, 19CrossRefGoogle Scholar
Huchtmeier, W. & Bohnenstengel, H.-G., 1981, A&A, 100, 72Google Scholar
Irwin, J. A., Hoffman, G. L., Spekkens, K., Haynes, M. P., Giovanelli, R., Linder, S. M., Catinella, B., Momjian, E., Koribalski, B. S., Davies, J., Brinks, E., de Blok, W. J. G., Putman, M. E. & van Driel, W., 2009, ApJ, 692, 1447CrossRefGoogle Scholar
Kent, B.R., Spekkens, K., Giovanelli, R., Haynes, M. P., Momjian, E., Cortes, J. R., Hardy, E. & West, A. A., 2009, ApJ, 691, 1595CrossRefGoogle Scholar
Kent, B. R., 2010, ApJ, 725, 2333CrossRefGoogle Scholar
Kilborn, V. A., Forbes, D.A., Koribalski, B. S., Brough, S. & Kern, K., 2006, MNRAS, 371, 739Google Scholar
Koribalski, B., Gordon, S. & Jones, K., 2003, MNRAS, 339, 1203CrossRefGoogle Scholar
Lauberts, A. & Valentijn, E. A., 1989, The surface photometry catalogue of the ESO-Uppsala galaxies, Garching: European Southern ObservatoryGoogle Scholar
Maddox, S. J., Efstathiou, G., Sutherland, W. J. & Loveday, J., 1990, MNRAS, 243, 692Google Scholar
Martin, D. C. et al. , 2005, ApJ, 619, L1CrossRefGoogle Scholar
Martinez-Delgado, D. et al. , 2010, AJ, 140, 962CrossRefGoogle Scholar
Mateo, M. L., 1998, ARA&A, 36, 435Google Scholar
Matthews, L. D., van Driel, W. & Monnier-Ragaigne, D., 2001, A&A, 365, 1Google Scholar
Mendez de Oliveira, C., Cypriano, E. S., Sodré, L. Jr., & Balkowski, C., 2004, ApJ, 605, L17CrossRefGoogle Scholar
Meurer, G. R. et al. , 2006, ApJ, 165, 307Google Scholar
Meyer, M. J. et al. , 2004, MNRAS, 350, 1195CrossRefGoogle Scholar
Minchin, R., Davies, J., Disney, M., Boyce, P., Garcia, D., Jordan, C., Kilborn, V., Lang, R., Roberts, S., Sabatini, S. & van Driel, W., 2005, ApJ, 622, 21CrossRefGoogle Scholar
Minchin, R. F., Davies, M. J., Disney, M. J., Marble, A. R., Impey, C. D., Boyce, P. J., Garcia, D. A., Grossi, M., Jordan, C. A., Lang, R. H., Roberts, S., Sabatini, S. & van Driel, W., 2008, arXiv:astro-ph/0508153v1Google Scholar
Mullan, B. et al. , 2011, ApJ, 731, 93CrossRefGoogle Scholar
Napier, P. J., Thomson, A. R. & Ekers, R. D., 1983, Proc. IEEE, 71, 1295CrossRefGoogle Scholar
Oey, M. S. & Clarke, C. J., 1998, AJ, 115, 1543CrossRefGoogle Scholar
Oosterloo, T. & van Gorkom, J., 2005, AA, 457, 19Google Scholar
Oosterloo, T., Fraternali, F. & Sancisi, R., 2007, AJ, 134, 1019CrossRefGoogle Scholar
Pettini, M. & Pagel, B., 2004, MNRAS, 348, 59CrossRefGoogle Scholar
Pickering, T. E., Impey, C. D., van Gorkom, J. H. & Bothun, G. D., 1997, AJ, 114, 1858CrossRefGoogle Scholar
Putman, M., Staveley-Smith, L., Freeman, K., Gibson, B. & Barnes, D., 2003, ApJ, 586, 170CrossRefGoogle Scholar
Ryan-Weber, E. V., Webster, R. L. & Staveley-Smith, L., 2003, MNRAS, 343, 1195CrossRefGoogle Scholar
Ryan-Weber, E. V., Meurer, G. R., Freeman, K. C., Putman, M. E., Webster, R. L., Drinkwater, M. J., Ferguson, H. C., Hanish, D., Heckman, T. M., Kennicutt, R. C., Kilborn, V. A., Knezek, P. M., Koribalski, B. S., Meyer, M. J., Oey, M. S., Smith, R. C., Staveley-Smith, L. & Zwaan, M. A., 2004, AJ, 127, 1431CrossRefGoogle Scholar
Ryder, S. D. et al. , 2001, AJ, 555, 232CrossRefGoogle Scholar
Schlegel, D., Finkbeiner, D. & Davis, M., 1998, ApJ, 500, 525CrossRefGoogle Scholar
Thilker, D. A. et al. , 2005, ApJ, 619, 79CrossRefGoogle Scholar
Thilker, D. A. et al. , 2007, ApJ, 173, 538Google Scholar
Werk, J. K., Putman, M. E., Meurer, G. R., Oey, M. S., Ryan-Weber, E. V., Kennicutt, R. C. Jr, & Freeman, K. C., 2008, ApJ, 678, 888CrossRefGoogle Scholar
Werk, J. K., Putman, M. E., Meurer, G. R., Ryan-Weber, E. V., Kehrig, C., Thilker, D. A., Bland-Hawthorn, J., Drinwater, M. J., Kennicutt, R. C., Wong, O. I., Freeman, K. C., Oey, M. S., Dopita, M. A., Doyle, M. T., Ferguson, H. C., Hanish, D. J., Heckman, T. M., Kilborn, V. A., Kim, J. H., Knezek, P. M., Koribalski, B., Meyer, M., Smith, R. C. & Zwaan, M. A., 2010a, AJ, 139, 279CrossRefGoogle Scholar
Werk, J., Putman, M., Meurer, G., Thilker, D., Allen, R., Bland-Hawthorn, J. & Freeman, K. C., 2010b, ApJ, 715, 656CrossRefGoogle Scholar
White, S. & Frenk, C., 1991, ApJ, 379, 52CrossRefGoogle Scholar