Hostname: page-component-586b7cd67f-rdxmf Total loading time: 0 Render date: 2024-11-22T18:36:33.889Z Has data issue: false hasContentIssue false
  • English
  • Français

Outer Disk Star Formation in HI selected Galaxies

Published online by Cambridge University Press:  21 March 2017

G. R. Meurer
G. R. Meurer*
Affiliation:
International Centre for Radio Astronomy Research 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.

The HI in galaxies often extends past their conventionally defined optical extent. I report results from our team which has been probing low intensity star formation in outer disks using imaging in Hα and ultraviolet. Using a sample of hundreds of HI selected galaxies, we confirm that outer disk HII regions and extended UV disks are common. Hence outer disks are not dormant but are dimly forming stars. Although the ultraviolet light in galaxies is more centrally concentrated than the HI, the UV/HI ratio (the Star Formation Efficiency) is nearly constant, with a slight dependency on surface brightness. This result is well accounted for in a model where disks maintain a constant stability parameter Q. This model also accounts for how the ISM and star formation are distributed in the bright parts of galaxies, and how HI appears to trace the distribution of dark matter in galaxy outskirts.

Keywords

galaxies: structuregalaxies: ISMgalaxies: star formationgalaxies: dwarfgalaxies: spiralgalaxies: irregular
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 11 , Symposium S321: Formation and Evolution of Galaxy Outskirts , March 2016 , pp. 172 - 179
Copyright
Copyright © International Astronomical Union 2017 

References

Bigiel, F., Leroy, A., Walter, F., et al. 2008, AJ, 136, 2846 Google Scholar
Bigiel, F., Leroy, A., Walter, F., et al. 2010a, AJ, 140, 1194 Google Scholar
Bigiel, F., Leroy, A., Seibert, M., et al. 2010b, ApJ, 720, L31 CrossRefGoogle Scholar
Bosma, A. 1981a, AJ, 86, 1791 Google Scholar
Bosma, A. 1981b, AJ, 86, 1825 Google Scholar
Bruzzese, S. M., Meurer, G. R., Lagos, C. D. P., et al. 2015, MNRAS, 447, 618 Google Scholar
Bruzzese, S. M. 2016, PhD Thesis, University of Western AustraliaGoogle Scholar
Carignan, C. & Beaulieu, S. F. 1989, ApJ, 347, 760 CrossRefGoogle Scholar
Carignan, C. & Puche, D. 1990a, AJ, 100, 394 CrossRefGoogle Scholar
Carignan, C. & Puche, D. 1990b, AJ, 100, 641 CrossRefGoogle Scholar
Carignan, C., Charbonneau, P., Boulanger, F., et al. 1990, A&A, 234, 43 Google Scholar
Cuillandre, J.-C., Lequeux, J., Allen, R. J., et al. 2001, ApJ, 554, 190 Google Scholar
de Blok, W. J. G. & Walter, F., 2003 MNRAS, 341, L39 CrossRefGoogle Scholar
Ferguson, A., Wyse, R., Gallagher, J. et al., 1998, ApJ, 506, L19 CrossRefGoogle Scholar
Freeman, K. C. 1970, ApJ, 160, 811 CrossRefGoogle Scholar
Gil de Paz, A., Madore, B. F., Boissier, S., et al. 2005, ApJ, 619, L29 Google Scholar
Gil de Paz, A., Boissier, S., Madore, B. F., et al. 2007, ApJS, 173, 185 Google Scholar
Gordon, K. J., Remage, N. H., & Roberts, M. S. 1968, ApJ, 154, 845 CrossRefGoogle Scholar
Hanish, D. J., Meurer, G. R., Ferguson, H. C., et al. 2006, ApJ, 649, 150 Google Scholar
Hessman, F. V. & Ziebart, M. 2011, A&A, 532, 121 Google Scholar
Hibbard, J. E., van Gorkom, J. H., Rupen, M. P., et al. 2001, ASP Conference Series, 240, 657 Google Scholar
Hoekstra, H., van Albada, T. S., & Sancisi, R. 2001, MNRAS, 323, 453 CrossRefGoogle Scholar
Höglund, B. & Roberts, M. S. 1965, ApJ, 142, 1366 Google Scholar
Huang, S., Haynes, M. P., Giovanelli, R., et al. 2012, ApJ, 756, 113 CrossRefGoogle Scholar
Kennicutt, R. C. Jr., 1989, ApJ, 344, 685 Google Scholar
Koda, J., Yagi, M., Boissier, S., et al. 2012, ApJ, 749, 20 Google Scholar
Koribalski, B. S., Staveley-Smith, L., Kilborn, V. A., et al. 2004, AJ, 128, 16 Google Scholar
Lee, J. C., Gil de Paz, A., Tremonti, C., et al. 2009, ApJ, 706, 599 CrossRefGoogle Scholar
Leroy, A. K., Walter, F., Brinks, E., et al. 2008, AJ, 136, 2782 Google Scholar
Martin, C. L. & Kennicutt, R. C. III, 2001, ApJ, 555, 301 Google Scholar
Meurer, G. R., Mackie, G., & Carignan, C. 1994, AJ, 107, 2021 Google Scholar
Meurer, G. R., Carignan, C., Beaulieu, S. F., et al. 1996, AJ, 111, 1551 Google Scholar
Meurer, G. R., Hanish, D. J., Ferguson, H. C., et al. 2006, ApJS, 165, 307 Google Scholar
Meurer, G. R., Wong, O. I., Kim, J. H., et al. 2009, ApJ, 695, 765 Google Scholar
Meurer, G. R., Zheng, Z., & de Blok, W. J. G. 2013, MNRAS, 429, 2537 Google Scholar
Meyer, M. J., Zwaan, M. A., Webster, R. L., et al. 2004, MNRAS, 350, 1195 Google Scholar
Mo, H. J., Mao, S., & White, S. D. M. 1998, MNRAS, 295, 319 Google Scholar
Persic, M., Salucci, P., & Stel, F. 1996, MNRAS, 281, 27 Google Scholar
Pfenniger, D. & Combes, F. 1994, A&A, 285, 94 Google Scholar
Pfenniger, D., Combes, F., & Martinet, L. 1994, A&A, 285, 79 Google Scholar
Roberts, M. S. 1966, ApJ, 144, 639 Google Scholar
Ryan-Weber, E. V., Meurer, G. R., Freeman, K. C., et al. 2004, AJ, 127, 1431 Google Scholar
Sanders, R. H. & McGaugh, S. S. 2002, ARA&A, 40, 263 Google Scholar
Santiago-Figueroa, N., Putman, M. E., Werk, J., et al. 2011, PASA, 28, 271 Google Scholar
Schiminovich, D., Catinella, B., Kauffmann, G., et al. 2010, MNRAS, 408, 919 CrossRefGoogle Scholar
Thilker, D. A., Bianchi, L., Boissier, S., et al. 2005, ApJ, 619, L79 Google Scholar
Thilker, D. A., Bianchi, L., Meurer, G. R., et al. 2007, ApJS, 173, 538 Google Scholar
Toomre, A. 1964, ApJ, 139, 1217 Google Scholar
van de Hulst, H. C., Raimond, E., & van Woerden, H. 1957, Bulletin of the Astronomical Institutes of the Netherlands, 14, 1 Google Scholar
Wang, B. & Silk, J. 1994, ApJ, 427, 759 Google Scholar
Werk, J. K., Putman, M. E., Meurer, G. R., et al. 2008, ApJ, 678, 888 Google Scholar
Werk, J. K., Putman, M. E., Meurer, G. R., et al. 2010a, AJ, 139, 279 Google Scholar
Werk, J. K., Putman, M. E., Meurer, G. R., et al. 2010b, ApJ, 715, 656 Google Scholar
Werk, J. K., Putman, M. E., Meurer, G. R., et al. 2011, ApJ, 735, 71 Google Scholar
Wong, O. I. 2007, PhD Thesis, University of MelbourneGoogle Scholar
Wong, O. I., Ryan-Weber, E. V., Garcia-Appadoo, D. A., et al. 2006, MNRAS, 371, 1855 Google Scholar
Wong, O. I., Meurer, G. R., Zheng, Z., et al. 2016, MNRAS, 460, 1106 Google Scholar
Wyder, T. K., Martin, D. C., Schiminovich, D., et al. 2007, ApJS, 173, 293 Google Scholar
Zheng, Z., Meurer, G. R., Heckman, T. M., et al. 2013, MNRAS, 434, 3389 Google Scholar