Vaporizing neutron stars in low-mass X ray binaries and the statistics of millisecond pulsars

Details Vaporizing neutron stars in low-mass X ray binaries and the statistics of millisecond pulsars Vaporizing neutron stars in low-mass X ray binaries and the statistics of millisecond pulsars

Aug 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991nsto.conf..197t&link_type=abstract

Neutron Stars, Proceedings of the NATO Advanced Study Institute, held in Agia Pelagia, Crete, Greece, Sept. 3-14, 1990, Dordrech

Computer Science

6

Accretion Disks, Companion Stars, Degeneration, Irradiation, Pulsars, Vaporizing, X Ray Binaries, Cosmic X Rays, Evaporation, Main Sequence Stars, Radiation Sources, Statistical Analysis

Scientific paper

Recent data on low-mass X-ray binaries (LMXB's) and msec pulsars (MSP's) pose a challenge to evolutionary theories which neglect the effects of disk and companion irradiation. Here we discuss the main features of a radiation driven (RD) evolutionary model that may be applicable to several LMXB's. According to this model, irradiation from the accreting compact star LMXB's 'vaporizes' the accretion disk and the companion star by driving a self-sustained mass loss until a sudden accretion turn-off occurs. The main characteristics of the RD-evolution are: (1) the lifetime of RD-LMXB's is of order 107 years or less: (2) both the orbital period gap and the X-ray luminosity may be consequences of RD-evolution of LMXB's containing lower main sequence and degenerate companion stars; (3) the companion star may transfer mass to the primary even if it underfills its Roche lobe; (4) the recycled msec pulsar can continue to vaporize the low-mass companion star even after the accretion turn-off produced by a strong pulsar wind; and (5) the RD evolutionary model resolves the apparent statistical discrepancy between the number of MSP's and their LMXB progenitors.

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