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astro-ph2006★ 3 cited
Unstable modes of non-axisymmetric gaseous discs
Naser M. Asghari, Mir Abbas Jalali
We present a perturbation theory for studying the instabilities of non-axisymmetric gaseous discs. We perturb the dynamical equations of self-gravitating fluids in the vicinity of…
astro-ph2002★ 2 cited
Scale-free equilibria of self-gravitating gaseous disks with flat rotation curves
Mir Abbas Jalali, Mehdi Abolghasemi
We introduce exact analytical solutions of the steady-state hydrodynamic equations of scale-free, self-gravitating gaseous disks with flat rotation curves. We express the velocity…
astro-ph2002★ 5 cited
The curvature condition for self-consistent scale-free galaxies
M. A. Jalali, P. Tim de Zeeuw
We modify the curvature condition for the existence of self-consistent scale-free discs, introduced by Zhao, Carollo & de Zeeuw. We survey the parameter space of the power-law disc…