A massive radio pulsar binary in the Small Magellanic Cloud

Details A massive radio pulsar binary in the Small Magellanic Cloud A massive radio pulsar binary in the Small Magellanic Cloud

Mar 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apj...423l..43k&link_type=abstract

Astrophysical Journal, Part 2 - Letters, vol. 423, no. 1, p. L43-L45

Astronomy and Astrophysics

Astronomy

82

Binary Stars, Doppler Effect, Luminosity, Magellanic Clouds, Optical Measurement, Progeny, Pulsars, Radio Astronomy, Radio Emission, Time Measurement, Charge Coupled Devices, Multispectral Tracking Telescopes, Radio Filters, Radio Telescopes, Telephotometry, Time Measuring Instruments

Scientific paper

We have discovered regular Doppler shifts of the pulse period of PSR J0045-7319, the only known pulsar in the Small Magellanic Cloud. These indicate that the pulsar is in a highly eccentric 51 day orbit with a companion star of mass greater than 4 solar mass. No regular eclipses of the pulsed signal are observed. Optical observations in the direction of the pulsar reveal a 16th magnitude B star, which we conclude is the pulsar's companion. Timing observations imply that this pulsar has not been spun up by accretion from the companion, suggesting that, like the PSR B1259-63 binary system, the PSR J0045-7319 system is a progenitor of an X-ray binary system.

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