Global axisymmetric stability analysis for a composite system of two gravitationally coupled scale-free discs

Abstract

In a composite system of gravitationally coupled stellar and gaseous discs, we perform linear stability analysis for axisymmetric coplanar perturbations using the two-fluid formalism. The background stellar and gaseous discs are taken to be scale-free with all physical variables varying as powers of cylindrical radius $r$ with compatible exponents. The unstable modes set in as neutral modes or stationary perturbation configurations with angular frequency $\omega =0$.

7 pages using AAS style

References in corpus (7)

• Circumnuclear Spiral Arms and Starburst Rings in Magnetized Barred Spiral Galaxies
• Magnetohydrodynamic Density Waves in a Composite Disk System of Interstellar Medium and Cosmic-Ray Gas
• Axisymmetric stability criterion for two gravitationally coupled singular isothermal discs
• Stationary perturbation configurations in a composite system of stellar and coplanarly magnetized gaseous singular isothermal discs
• Perturbation configurations in a two-fluid system of singular isothermal disks
• Gravitationally coupled scale-free discs
• Stationary Nonaxisymmetric Configurations of Magnetized Singular Isothermal Disks

Cited by in corpus (3)

• Global Perturbation Configurations in a Composite Disc System with an Isopedic Magnetic Field
• Axisymmetric stability criteria for a composite system of stellar and magnetized gaseous singular isothermal discs
• Scale-Free Thin Discs with an Isopedic Magnetic Field