On the spin – up of neutron stars to millisecond pulsars in long – period binaries

Abstract

We study the accretion efficiency of neutron stars in long– period binaries (P ∼> 20 d) which accrete from a giant companion. Using α–disc models and taking into account the effect of irradiation of the accretion disc by the central accretion light source we derive explicit expressions for the duty cycle d and the accretion efficiency η in terms of the… (More)

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