Spread of matter over a neutron-star surface during disk accretion: Deceleration of rapid rotation

摘要: The problem of disk accretion onto the surface a neutron star with weak magnetic field at luminosity exceeding several percent Eddington one is reduced to braking hypersonic flow velocity that 0.4–0.5 speed light above base spreading layer-a dense atmosphere made up previously fallen matter. We show turbulent in Prandtl-Karman model universally accepted coefficients for terrestrial conditions and laboratory experiments ladder interacting gravity waves stratified quasi-exponential standard Richardson numbers lead spin-up massive zone extends “ocean“ plasma degenerate electrons. Turbulent ocean boundary outer solid crust reduces rotation solid-body star. This picture should strong heating deep atmospheric layers switch-off explosive helium burning mechanism. Obviously, more efficient mechanism dissipation azimuthal operate X-ray bursters. giant solitary wave can energy sharp, abrupt decrease fairly rarefied nuclear reactions. discuss reasons why this has no direct analog Earth’s appears its stability. pose question as whether stars atmospheres spun high velocities by accreting matter from exist among observed Galactic sources.