Accretion, ablation and propeller evolution in close millisecond pulsar binary systems

摘要: A model for the formation and evolution of binary millisecond radio pulsars in systems with low mass companions (<0.1 M⊙) is investigated using a population synthesis technique. Taking into account non conservative system due to loss from an accretion disk as result propeller action companion via ablation by pulsar, transition powered rotation phase investigated. It shown that operation mechanisms can be responsible black widow pulsar X-ray at orbital period ∼0.1 day. For range input parameters, results reveal characterized periods long ∼0.4 days masses ∼0.005 M⊙ produced. The minimum this critically depend on thermal bloating semi-degenerate hydrogen losing component, longer greater degree bloating. Provided radius increased about factor 2 relative fully degenerate, zero temperature configuration, approximate agreement between observed theoretical modeling rich donors achieved. We find no discrepancy estimated birth rates LMXBs systems, which average are \({\sim}1.3\times10^{-5}~{\rm yr}^{-1}\) \(1.3\times10^{-7}~{\rm respectively.