Hostname: page-component-cd9895bd7-8ctnn Total loading time: 0 Render date: 2024-12-12T19:56:26.181Z Has data issue: false hasContentIssue false
  • English
  • Français

Dark Matter in Dwarf Galaxies

Published online by Cambridge University Press:  04 August 2017

John Kormendy
John Kormendy*
Affiliation:
Dominion Astrophysical Observatory, 5071 W. Saanich Road, Victoria, B. C. V8X 4M6 Canada

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.

This paper reviews the observational evidence for dark matter (DM) in dwarf spiral (dS) and dwarf spheroidal (dE) galaxies. The most secure detection of DM in dwarf galaxies is given by HI rotation curves. They provide estimates of DM halo parameters, i. e., isothermal core radii rc, central densities ρ0 and one-dimensional velocity dispersions σ. The smallest DM halo measured so far is in DDO 127 (MB = −14.5 for H0 = 75 km s−1 Mpc−1, rc ≃ 2.3 kpc, σ ≃ 27 km s−1). If this halo is made of neutrinos of mass mv, then phase-space constraints imply that mv > 110 eV. This is difficult to reconcile with cosmological upper limits giving Ω ≤ 1. Ultimately, dE galaxies will provide the strongest constraints on DM in dwarf galaxies; a detailed look at present results shows that they are not yet conclusive.

Type
Review Paper
Information
Symposium - International Astronomical Union , Volume 117: Dark Matter in the Universe , 1987 , pp. 139 - 152
Copyright
Copyright © Reidel 1987 

References

Aaronson, M. 1983, Ap. J. (Letters), 266, L11.Google Scholar
Aaronson, M. 1986, in Star Forming Dwarf Galaxies and Related Objects, ed. Kunth, D., Thuan, T. X. and Van, J. T. T. (Paris: Editions Frontières), in press.Google Scholar
Aaronson, M., and Olszewski, E. 1986, in IAU Symposium 117, Dark Matter in the Universe, ed. Kormendy, J. and Knapp, G. R. (Dordrecht: Reidel).Google Scholar
Bahcall, J. N., and Casertano, S. 1985, Ap. J. (Letters), 293, L7.CrossRefGoogle Scholar
Bosma, A., Kormendy, J., and Souviron, J. 1986, in preparation.Google Scholar
Carignan, C., and Freeman, K. C. 1985, Ap. J., 294, 494.Google Scholar
Carignan, C., Sancisi, R., and van Albada, T. S. 1985, preprint.Google Scholar
Cowsik, R. 1985, preprint.Google Scholar
Davis, M., Lecar, M., Pryor, C., and Witten, E. 1981, Ap. J., 250, 423.Google Scholar
Faber, S. M., and Jackson, R. E. 1976, Ap. J., 204, 668.Google Scholar
Faber, S. M., and Lin, D. N. C. 1983, Ap. J. (Letters), 266, L17.Google Scholar
Freeman, K. C. 1970, Ap. J., 160, 811.Google Scholar
Freeman, K. C. 1986, in IAU Symposium 117, Dark Matter in the Universe, ed. Kormendy, J. and Knapp, G. R. (Dordrecht: Reidel).Google Scholar
Gottesman, S. T., and Weliachew, L. 1977, Astr. Ap., 61, 523.Google Scholar
Gunn, J. E. 1982, in Astrophysical Cosmology, Proceedings of the Study Week on Cosmology and Fundamental Physics, ed. Brück, H. A., Coyne, G. V. and Longair, M. S. (Vatican City: Pontifical Academy of Sciences), p. 557.Google Scholar
Illingworth, G. 1977, Ap. J. (Letters), 218, L43.Google Scholar
King, I. 1962, A. J., 67, 471.Google Scholar
King, I. R. 1966, A. J., 71, 64.Google Scholar
Kormendy, J. 1985, Ap. J., 295, 73.Google Scholar
Krumm, N., and Burstein, D. 1984, A. J., 89, 1319.CrossRefGoogle Scholar
Kuhn, T. S. 1970, The Structure of Scientific Revolutions, (Chicago: University of Chicago Press).Google Scholar
Lake, G., and Schommer, R. A. 1984, Ap. J. (Letters), 279, L19.Google Scholar
Lo, K. Y., and Sargent, W. L. W. 1979, Ap. J., 227, 756.Google Scholar
Madsen, J., and Epstein, R. I. 1984, Ap. J., 282, 11.CrossRefGoogle Scholar
McClure, R. D., Fletcher, J. M., Grundmann, W. A., and Richardson, E. H. 1985, in IAU Colloquium 88, Stellar Radial Velocities, ed. Davis Philip, A. G. and Latham, D. W., in Schenectady, eds. L. Davis Press, p. 49.Google Scholar
McClure, R. D., Fletcher, J. M., Hartwick, F. D. A., and Kormendy, J. 1986, in preparation.Google Scholar
Peterson, C. J., and King, I. R. 1975, A. J., 80, 427.Google Scholar
Pryor, C., McClure, R. D., and Hesser, J. E. 1986, A. J., in preparation.Google Scholar
Sancisi, R., and van Albada, T. S. 1986, in IAU Symposium 117, Dark Matter in the Universe, ed. Kormendy, J. and Knapp, G. R. (Dordrecht: Reidel).Google Scholar
Sargent, W. L. W., Sancisi, R., and Lo, K. Y. 1983, Ap. J., 265, 711.Google Scholar
Schechter, P. L. 1980, A. J., 85, 801.Google Scholar
Seitzer, P., and Frogel, J. A. 1985, A. J., 90, 1796.Google Scholar
Souviron, J., Kormendy, J., and Bosma, A. 1986, in preparation.Google Scholar
Tremaine, S. 1986, discussion comment following this paper.Google Scholar
Tremaine, S., and Gunn, J. E. 1979, Phys. Rev. Letters, 42, 407.Google Scholar
Turner, M. S. 1986, in IAU Symposium 117, Dark Matter in the Universe, ed. Kormendy, J. and Knapp, G. R. (Dordrecht: Reidel).Google Scholar
Tully, R. B., and Fisher, J. R. 1977, Astr. Ap., 54, 661.Google Scholar
van Albada, T. S., Bahcall, J. N., Begeman, K., and Sancisi, R. 1985, Ap. J., 295, 305.Google Scholar
White, S. D. M. 1986, in IAU Symposium 117, Dark Matter in the Universe, ed. Kormendy, J. and Knapp, G. R. (Dordrecht: Reidel).Google Scholar