Accretion Of A Neutron Star Moving At A High Kick Velocity In Supernova

The accretion is an increase in the mass of a celestial object by the collection of surrounding interstellar gases and objects by gravitation, which is an ubiquitous process in astrophysics. A range of high-energy phenomena about large luminosity or high frequency radiation can be explained by accretion. About 10% mass accreted by compact star, such as neutron star or black hole, can be transfered into radiation. It is known that accretion is one of the most efficient exoergic mechanisms in the universe.- The accretion phenomenon was firstly discussed by Kelvin et al. on the 19th. Hoyle & Lyttleton(1939) considered the accretion of the non-temperature statice gas on moving star. In 1952, Bondi solved the hydrodynamic version of the star in a static ambient medium, who showed a certain gravitational capture radius, got Bondi accretion rates. After Bondi, the classic problem of accretion onto compact objects has been studied by many authors. This thesis reviews the Bondi spherical and HL cylindroconical accretion. The problem of spherical accretion onto a compact object from a medium that is initially uniform but radially outflowing, was first explored by Colgate (1971) and Zel'dovich et al. (1972). And the spherically symmetric accretion of material from an initially homogeneous, uniformly expanding medium onto a point mass has been discussed by Colpi et al. (1996). Chevalier(1989) has estimated that about a total mass of 0.1M is accreted by the compact remnant according parameters relevant to SN 1987A. These studies do not consider that the neutron star moves with a high kick velocity. This thesis also reviews the evolution in the earlier age of supernova explosion, and argues that...