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Please use this identifier to cite or link to this item: http://hdl.handle.net/2248/2114
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dc.contributor.authorJog, C. J-
dc.date.accessioned2008-03-04T09:08:18Z-
dc.date.available2008-03-04T09:08:18Z-
dc.date.issued2000-
dc.identifier.citationBASI, Vol. 28, No. 2, pp. 309 - 310en
dc.identifier.urihttp://hdl.handle.net/2248/2114-
dc.description.abstractThe 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.extent144751 bytes-
dc.format.mimetypeapplication/pdf-
dc.language.isoenen
dc.publisherAstronomical Society of Indiaen
dc.relation.urihttp://adsabs.harvard.edu/abs/2000BASI...28..309Jen
dc.subjectGalaxiesen
dc.subjectKinematics and dynamics-galaxiesen
dc.subjectISM - galaxiesen
dc.subjectSpiral - instabilitiesen
dc.titleLocal stability criterion for a two component galactic disken
dc.typeArticleen
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