Formation and coalescence of relativistic binary stars: the effect of kick velocity

Abstract
Using Monte Carlo calculations of the modern scenario for binary stellar evolution, and taking account of the spin evolution of magnetized compact stars (the ‘scenario machine’), we compute for the first time the number of galactic binary pulsars with different companion types [OB star, white dwarf (WD), neutron star (NS), black hole (BH), or planet] assuming various phenomenological distributions for kick velocities of newborn NSs. We demonstrate a strong dependence of the binary pulsar population fractions relative to single pulsars on the mean kick velocity, and find an optimal kick velocity of 150–200 km s−1.
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