The binary pulsar PSR 1908+00 in NGC 6760

W. T.S. Deich, J. Middleditch, S. B. Anderson, S. R. Kulkarni, T. A. Prince, A. Wolszczan

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We present orbital parameters of the 3.6 ms binary pulsar 1908+00 in the globular cluster NGC 6760. The orbital period is 3.4 hr, and the mass function is 3 × 10-6 M, implying a minimum companion mass of 0.018 M. The companion is probably degenerate; and if it is hydrogen, it is close to overflowing its Roche lobe. The only other millisecond binary radio pulsar systems with orbital period <10 hr and mass function below 10-3 M are the eclipsing pulsars 1957+20 and 1744-24A, and the very low mass binary 0021-72J. These pulsars are ablating their companions and may be the progenitors of isolated millisecond pulsars. PSR 1908+00 shows no evidence for long-duration eclipses as are seen in 1744-24A, but short-duration eclipses as in 1957+20 are not excluded.

Original languageEnglish (US)
Pages (from-to)L95-L98
JournalAstrophysical Journal
Issue number2 PART 2
StatePublished - Jun 20 1993

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science


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