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Global Bar–Forming Instabilities

Published online by Cambridge University Press:  12 April 2016

D. M. Christodoulou ,
I. Shlosman ,
D. Kazanas  and
J. E. Tohline
D. M. Christodoulou
Affiliation:
Department of Physics & Astronomy, Louisiana State University, Baton Rouge, LA 70803
I. Shlosman
Affiliation:
Department of Physics & Astronomy, Louisiana State University, Baton Rouge, LA 70803
D. Kazanas
Affiliation:
NASA Goddard Space Flight Center, Code 665, Greenbelt, MD 20771
J. E. Tohline
Affiliation:
Department of Physics & Astronomy, Louisiana State University, Baton Rouge, LA 70803

Extract

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We have recently obtained some interesting results on the global stability characteristics of gaseous and stellar systems using a free–energy variational formulation and Ginzburg–Landau phase transition theory (Christodoulou et al. 1995a, b). For m = 2 nonaxisymmetric modes in particular, we have been able to formulate a new, robust, global stability criterion (Christodoulou, Shlosman, & Tohline 1995, hereafter CST) that avoids many of the problems that plagued the well–known Ostriker & Peebles (1973) criterion. In this article, we briefly summarize the conclusions from the above–cited investigations and we proceed to comment on the stability properties of some interesting stellar models that were discussed during this conference and that are not trivially understood in terms of the new stability criterion.

Type
Part VII. Theory and Observation
Information
International Astronomical Union Colloquium , Volume 157: Barred Galaxies , 1996 , pp. 420 - 422
Copyright
Copyright © Astronomical Society of the Pacific 1996

References

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