Forum Springer Astron. Astrophys.
Forum Whats New Search Orders

Astron. Astrophys. 344, 505-510 (1999)

Table of Contents
Available formats: HTML | PDF | (gzipped) PostScript

Asymmetric supernova explosions and the formation of short period low-mass X-ray binaries

W. Sutantyo

Department of Astronomy, Institut Teknologi Bandung, Jl. Ganesha 10, Bandung 40132, Indonesia (sutantyo@bdg.centrin.net.id)

Received 30 September 1998 / Accepted 22 January 1999


We consider the formation of short period low-mass X-ray binaries using standard evolutionary scenario which involves a common envelope phase and a supernova explosion. We consider three models of systems and assume several values of the efficiency factor for the common envelope evolution ([FORMULA]). In most cases the systems can only be formed if the neutron stars in the systems receive a kick velocity at their birth. We determine the lower and upper limits of the required kick velocity as a function of [FORMULA]. Larger kicks are required to form shorter orbital period systems. Higher [FORMULA] also requires larger kicks. In general, the required kick velocity is of the order of a few hundred [FORMULA] with a maximum of [FORMULA] 1000 [FORMULA]. The range of the required kick velocity is narrower for higher [FORMULA].

Key words: stars: supernovae: general – stars: neutron – stars: evolution – stars: binaries: general

© European Southern Observatory (ESO) 1999

Online publication: March 18, 1999