Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982ap%26ss..81..379b&link_type=abstract
Astrophysics and Space Science, vol. 81, no. 1-2, Jan. 1982, p. 379-385. Research supported by the British Council.
Astronomy and Astrophysics
Astronomy
Binary Stars, Pulsars, X Ray Astronomy, X Ray Stars, Astronomical Catalogs, Mass Transfer, Neutron Stars, Stellar Mass Accretion, Stellar Winds
Scientific paper
A gap, ranging from about P=10 sec to P=100 sec, has been noted in the pulse period distribution of the binary X-ray pulsars (Rappaport and Joss, 1977). An explanation for this gap is given in terms of the character of mass transfer in the binary system. The explanation maintains that the gap is produced because neutrons in the system are slowed down to either P less than or equal to 10 sec by Roche-lobe mass transfer in low-mass binaries or to P greater than or equal to 100 sec by stellar winds in massive binaries. The period gap is maintained as the slow pulsars cross this gap, in a time which is short compared to their life-time, because of the increase in the mass transfer rate with the evolution of the normal star.
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