Astronomy and Astrophysics – Astronomy
Scientific paper
May 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991pazh...17..433e&link_type=abstract
Pis'ma v Astronomicheskii Zhurnal (ISSN 0320-0108), vol. 17, May 1991, p. 433-439. In Russian. In Russian. In Russian.
Astronomy and Astrophysics
Astronomy
2
Globular Clusters, Main Sequence Stars, Pulsars, Stellar Evolution, X Ray Binaries, Cataclysmic Variables, Companion Stars, Pulse Duration, Roche Limit, Stellar Mass, White Dwarf Stars
Scientific paper
The evolutionary status of a close binary system in the globular cluster Ter 5 is investigated. The system has an orbital period of 1.8 h and includes a millisecond pulsar (MSP) with a period of 11 ms. It is shown that the observed parameters of this system may be obtained if it is assumed that the pulsar companion is a main-sequence star evaporating under the influence of MSP radiation. In that case the progenitor of the MSP is a low-mass X-ray binary, and the evaporation begins after cessation of the mass exchange in the period gap of cataclysmic variables. Calculations show that such a companion must fill its Roche lobe again at an orbital period of 1.1 h, with accretion X-ray luminosity approximating 10 to the 35th to 10 to the 36th erg/s.
Ergma E. V.
Fedorova Alexandra V.
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