Dynamic evolution of a quasi-spherical general polytropic magnetofluid with self-gravity

摘要: In various astrophysical contexts, we analyze self-similar behaviours of magnetohydrodynamic (MHD) evolution a quasi-spherical polytropic magnetized gas under self-gravity with the specific entropy conserved along streamlines. particular, this MHD model analysis frees scaling parameter n in conventional transformation from constraint n+γ=2 γ being index and therefore substantially generalizes earlier results on dynamics that has constant everywhere space at all time. On basis nonlinear ordinary differential equations, examine magnetosonic critical curves, shock conditions, asymptotic solutions. We then construct global semi-complete solutions using combination analytical numerical means indicate plausible applications these flow or without shocks.