Birthrates of low-mass binary pulsars and low-mass X-ray binaries

Details Birthrates of low-mass binary pulsars and low-mass X-ray binaries Birthrates of low-mass binary pulsars and low-mass X-ray binaries

Dec 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...335..755k&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 335, Dec. 15, 1988, p. 755-768.

Other

123

Pulsars, Star Formation Rate, Stellar Mass, X Ray Binaries, Astronomical Catalogs, Main Sequence Stars, White Dwarf Stars

Scientific paper

The authors examine the commonly accepted hypothesis that low-mass binary radio pulsars (LMBPs) are the end products of low-mass X-ray binaries (LMXBs). In steady state, the birthrates of these two classes of binaries should be equal to each other. Using results from pulsar surveys, from published X-ray sources catalogs and from stellar evolution models, the authors find that the birthrate of LMXBs exceeds that of LMBPs by a factor of ≡10. The observed distribuion of the orbital periods of the LMBPs cannot be satisfactorily explained. Specifically, the birthrate of the small orbital period systems like PSR 1855+09 exceeds the birthrate of the progenitor LMXB systems by a factor of 100. Possible solutions for this discrepancy are discussed.

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