Hostname: page-component-586b7cd67f-t7czq Total loading time: 0 Render date: 2024-11-26T03:58:12.282Z Has data issue: false hasContentIssue false
  • English
  • Français

Extended HI disks in nearby spiral galaxies

Published online by Cambridge University Press:  21 March 2017

Albert Bosma
Albert Bosma*
Affiliation:
Aix Marseille Université, CNRS, LAM (Laboratoire d’Astrophysique de Marseille) UMR 7326, 13388, Marseille, France 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.

In this short write-up, I will concentrate on a few topics of interest. In the 1970s I found very extended HI disks in galaxies such as NGC 5055 and NGC 2841, out to 2 - 2.5 times the Holmberg radius. Since these galaxies are warped, a “tilted ring model” allows rotation curves to be derived, and evidence for dark matter to be found. The evaluation of the amount of dark matter is hampered by a disk-halo degeneracy, which can possibly be broken by observations of velocity dispersions in both the MgI region and the CaII region.

Keywords

extended HI diskswarpdark matter
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 11 , Symposium S321: Formation and Evolution of Galaxy Outskirts , March 2016 , pp. 220 - 222
Copyright
Copyright © International Astronomical Union 2017 

References

Anyian, S., Freeman, K. C., Gerhard, O. E., Arnaboldi, M., & Flynn, C. 2016, MNRAS, 456, 1484 Google Scholar
Aparico, A. & Gallart, C. 2004, AJ, 128, 1465 Google Scholar
Athanassoula, E., Bosma, A., & Papaioannou, S. 1987, A&A, 179, 23 Google Scholar
Bershady, M. A., Martinsson, T. P. K., Verheijen, M. A. W., Westfall, K. B., Andersen, D. R., & Swaters, R. A. 2011, ApJ, 739, L47 CrossRefGoogle Scholar
Bosma, A. 1978, PhD thesis, University of Groningen, http://ned.ipac.caltech.edu/level5/March05/Bosma/frames.html Google Scholar
Bosma, A. 1999, in Merritt, D. R., Valluri, M., and Sellwood, J. A. (eds.), Galaxy Dynamics, ASP Conference Series vol. 182 (San Francisco: ASP), 339 Google Scholar
Bosma, A. & van der Kruit, P. C. 1979, A&A, 79, 281 Google Scholar
Bottema, R. 1993, A&A, 275, 16 Google Scholar
Dessauges-Zavadsky, M., Verdugo, C., Combes, F., & Pfenniger, D. 2014, A&A, 566, A147 Google Scholar
Gum, C. S, Kerr, F. J., & Westerhout, G. 1960, MNRAS, 121, 132 CrossRefGoogle Scholar
Holmberg, E. 1958, Medd. Lund Obs., Ser. II no. 136Google Scholar
Kahn, F. D. & Woltjer, L. 1959, ApJ, 130, 705 CrossRefGoogle Scholar
Kranz, T., Slyz, A., & Rix, H.-W. 2003, ApJ, 586, 143 CrossRefGoogle Scholar
Martínez-Delgado, D., Gabany, R. J., Crawford, K., et al. 2010, AJ, 140, 962 Google Scholar
Muñoz-Mateos, J. C., Sheth, K., Regan, M., et al. 2015, ApJS, 219, 3 Google Scholar
Rogstad, D. H., Lockhart, I. A., & Wright, M. H. 1974, ApJ, 193, 309 CrossRefGoogle Scholar
Sancisi, R. 1976, A&A, 53, 159 Google Scholar
Sandage, A. 1961, The Hubble Atlas of Galaxies, Carnegie Institution of Washington Google Scholar
Thilker, D. A., Bianchi, L., Meurer, G., et al. 2007, ApJS, 173, 538 Google Scholar
van Albada, T. S. & Sancisi, R. 1986, Royal Society (London), Phil. Trans., 320, 447 Google Scholar
van de Hulst, H. C., Raimond, E., & van Woerden, H. 1957, BAN, 14, 1 Google Scholar
Westfall, K. B., Bershady, M. A., & Verheijen, M. 2011, ApJS, 193, 21 Google Scholar
Weiner, B. J., Sellwood, J. A., & Williams, T. B. 2001, ApJ, 546, 931 Google Scholar