Hostname: page-component-586b7cd67f-2brh9 Total loading time: 0 Render date: 2024-11-26T20:20:39.130Z Has data issue: false hasContentIssue false
  • English
  • Français

Theoretical Limits on the Properties of Low-Velocity M-Dwarfs

Published online by Cambridge University Press:  14 August 2015

P. Biermann
P. Biermann*
Affiliation:
Universitäts-Sternwarte Göttingen, F.R.G.

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.

Using a version of the Toomre-criterion (Toomre, 1964) for a mixture of stellar populations, limits are derived for the kinematical properties of the newly discovered population of low-velocity M-dwarfs (Weistrop, 1972; Murray and Sanduleak, 1972); these stars are claimed to be a large mass-fraction (≳ 0.5) of all stars in the solar neighbourhood and to have only 10 km s−1 velocity dispersion. They could make up for the locally missing mass (Oort, 1965; Schmidt, 1974). It is found that a configuration of stellar populations with the M-dwarfs included (having such properties) is not stable in the sense of the Toomre-criterion. The limiting stability properties are given.

Type
Part II/Flattened Systems
Information
Symposium - International Astronomical Union , Volume 69: Dynamics of Stellar Systems , 1975 , pp. 321 - 324
Copyright
Copyright © Reidel 1975 

References

Biermann, P. and Tinsley, B. M.: 1974, Astron. Astrophys. 30, 1.Google Scholar
Biermann, P.: 1974, Astron. Astrophys. 30, 31.Google Scholar
Hunter, C.: 1970, Studies in Appl. Math. 49, 59.Google Scholar
King, I. R.: 1965, Astron. J. 70, 296.CrossRefGoogle Scholar
Larson, R. B.: 1969, Monthly Notices Roy. Astron. Soc. 145, 405.Google Scholar
Miller, R. H.: 1974, Astrophys. J. 190, 539.Google Scholar
Murray, C. A. and Sanduleak, N.: 1972, Monthly Notices Roy. Astron. Soc. 157, 273.Google Scholar
Oort, J. H.: 1965, Stars and Stellar Systems 5, 455.Google Scholar
Schmidt, M.: 1974, this volume, p. 325.Google Scholar
Thé, P. S. and Staller, R. F. A.: 1974, Astron. Astrophys. (in press).Google Scholar
Toomre, A.: 1964, Astrophys. J. 139, 1217.CrossRefGoogle Scholar
Vandervoort, P. O.: 1970, Astrophys. J. 162, 453.CrossRefGoogle Scholar
Weistrop, D.: 1972, Astron. J. 77, 849.CrossRefGoogle Scholar
Wielen, R.: 1974, in Contopoulos, G. (ed.), Highlights of Astronomy, Vol. 3, D. Reidel Publ. Co., Dordrecht – Holland, p. 395.CrossRefGoogle Scholar