Local stability criterion for a two component galactic disk

dc.contributor.author	Jog, C. J
dc.date.accessioned	2008-03-04T09:08:18Z
dc.date.available	2008-03-04T09:08:18Z
dc.date.issued	2000
dc.identifier.citation	BASI, Vol. 28, No. 2, pp. 309 - 310	en
dc.identifier.uri	http://hdl.handle.net/2248/2114
dc.description.abstract	The criterion for stability against local, axisymmetric perturbations in gravitationally coupled stars and gas in a galactic disk is obtained. The new feature is the inclusion of both stars and gas in the study, and a two-component analog of the standard one-component Q-criterion is obtained which is applicable to realistic galaxies consisting of stars and gas. The Qs-g value is shown to be always less than the Q values for the stars-alone and the gas-alone cases, thus a two-component system is more unstable than either component by itself. Hence, future studies of galaxies must use Qs-g as a measure of disk stability. The results obtained are general, and several applications for the stability, structure, and evolution of galaxies are discussed.	en
dc.format.extent	144751 bytes
dc.format.mimetype	application/pdf
dc.language.iso	en	en
dc.publisher	Astronomical Society of India	en
dc.relation.uri	http://adsabs.harvard.edu/abs/2000BASI...28..309J	en
dc.subject	Galaxies	en
dc.subject	Kinematics and dynamics-galaxies	en
dc.subject	ISM - galaxies	en
dc.subject	Spiral - instabilities	en
dc.title	Local stability criterion for a two component galactic disk	en
dc.type	Article	en