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Galactic Slow Bar as an Unstable Mode of a Stellar Disk

Published online by Cambridge University Press:  12 April 2016

Evgenij V. Polyachenko  and
Valerij L. Polyachenko
Evgenij V. Polyachenko
Affiliation:
Institute of Astronomy, 48 Pyatnitskaya St., Moscow 109017, Russia
Valerij L. Polyachenko
Affiliation:
Institute of Astronomy, 48 Pyatnitskaya St., Moscow 109017, Russia

Abstract

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An estimate for the slow bar instability boundary for a generalized disk polytropic model is derived. The effects of a spherical halo are studied: it turns out that a halo can be favorable to this instability (at the same time suppressing the bending instability).

Type
Posters of Part VII and Part VIII
Information
International Astronomical Union Colloquium , Volume 157: Barred Galaxies , 1996 , pp. 476 - 479
Copyright
Copyright © Astronomical Society of the Pacific 1996

References

Combes, F. & Elmegreen, B.G. 1993, A&A, 271, 391 Google Scholar
Noguchi, M. 1988, A&A, 203, 289 Google Scholar
Polyachenko, V.L. & Polyachenko, E.V. 1994, Astronomy Letters, 20, 416 Google Scholar
Polyachenko, V.L. & Polyachenko, E.V. 1995, to appearGoogle Scholar