Comments on `the white dwarf collapse in low mass binary systems'

Abstract

White dwarfs have been shown to possess high-angular momenta, in low-mass binary systems, in the context of formation of "spinars". Whether the collapse to a neutron star occurs spontaneously or is triggered by mass transfer from the companion, is an unresolved question. Many models to type I SN (Whelan and Iben, 1973) refer to the latter case. However, in his recent paper Lipunov (1983) did not consider the formation of a neutron star from a SN explosion in greater detail. The occurrence of pulsars in binary systems also poses serious evolutionary problems. It is possible that low mass binary systems with massive and weak magnetic field WDs as primaries form neutron stars associated with high-space velocities.