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Pulsation Modes of Spherical Stellar Systems

Published online by Cambridge University Press:  14 August 2015

J. A. Sellwood  and
C. Pryor
J. A. Sellwood
Affiliation:
Rutgers, the State University of New JerseyDept. of Physics and Astronomy, 136 Frelinghuysen Rd., Piscataway, NJ 08854-8019
C. Pryor
Affiliation:
Rutgers, the State University of New JerseyDept. of Physics and Astronomy, 136 Frelinghuysen Rd., Piscataway, NJ 08854-8019

Extract

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Kuhn & Miller (1989, KM hereafter) proposed that a small stellar system in orbit around a large galaxy could be heated through resonant coupling between the orbital motion and internal modes of oscillation of the satellite. They further argued that the apparently large mass-to-light (M/L) ratios of dwarf spheroidal (dSph) galaxies around the Milky Way (e.g., Armandroff, Olszewski & Pryor 1995) could be illusory because the satellites are far from virial equilibrium as a consequence of such resonant heating. We note that if the true M/Ls are small, some dSphs have much more kinetic energy than is required to unbind them; a resonant pumping mechanism which adds a modest amount of energy each cycle could not achieve this (Pryor 1996).

Type
II. Joint Discussions
Information
Highlights of Astronomy , Volume 11 , Issue 2: Highlights of Astronomy. As presented at the XXIIIrd General Assembly of the IAU (Part B), 1997 , 1998 , pp. 638 - 640
Copyright
Copyright © Kluwer 1998

References

Armandroff, T. E., Olszewski, E. W. & Pryor, C. (1995) AJ, 110, 2131 Google Scholar
Binney, J. & Tremaine, S. (1987) Galactic Dynamics, Princeton University Press, Princeton Google Scholar
David, M. & Theuns, T. (1989) MNRAS, 240, 957 Google Scholar
Hénon, M. (1973) Astron. Ap., 24, 229 Google Scholar
Kuhn, J. R. & Miller, R. H. (1989) ApJ, 341, L41 Google Scholar
Louis, P. D. (1992) MNRAS, 258, 552 Google Scholar
Louis, P. D. & Gerhard, O. E. (1988) MNRAS, 233, 337 CrossRefGoogle Scholar
Mathur, S. D. (1990) MNRAS, 243, 529 Google Scholar
Miller, H. H. & Smith, B. E. (1994) Gel. Mech. Dyn. Astr., 59, 161 CrossRefGoogle Scholar
Pryor, C. (1996) in Formation of the Galactic Halo … Inside and Out, Morrison, H. & Sarajedini, A., eds., ASP, San Francisco, p. 424 Google Scholar
Samimi, J. & Sobouti, Y. (1995) Astron. Ap., 297, 707 Google Scholar
Sellwood, J. A. & Athanassoula, E. (1986) MNRAS, 221, 195 CrossRefGoogle Scholar
Sridhar, S. (1989) MNRAS, 238, 1159 CrossRefGoogle Scholar
Weinberg, M. D. (1991) ApJ, 373, 391 CrossRefGoogle Scholar