Discovery of three binary millisecond pulsars

Details Discovery of three binary millisecond pulsars Discovery of three binary millisecond pulsars

Apr 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apj...425l..41b&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 425, no. 1, p. L41-L44

Astronomy and Astrophysics

Astronomy

78

Pulsars, Radiation Sources, Radio Astronomy, Radio Bursts, Decimeter Waves, Radio Telescopes, Ultrahigh Frequencies

Scientific paper

We report the discovery of three binary millisecond pulsars in circular orbits with low-mass companions from a continuing survey of the southern sky with the Parkes radio telescope. The three pulsars, PSR J0034-0534, PSR J1045-4509, and PSR J2145-0750 have pulse periods of 1.87, 7.47, and 16.05 ms and orbital periods of 1.6, 4.1, and 6.8 days, respectively. PSR J2145-0750 has a spin-down age of approximately greater than 12 Gyr, which raises interesting questions about its progenitor and initial pulse period. The properties of the growing class of radio pulsars with low-mass companions are discussed, and we suggest that their velocities, and a tendency for the short-period pulsars to have small orbital periods, are consistent with their formation from Type II supernova explosions.

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