V. Kaspi, S. Johnston, R. Manchester, M. Bailes, J. Bell, M. Bessell, A. Lyne, N. D'Amico
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A radio pulsar‐B star binary in the small magellanic cloud
We report the discovery of regular Doppler shifts of the pulse period of PSR J0045−7319, the only known pulsar in the Small Magellanic Cloud. The pulsar is in a highly concentric 51‐day orbit with a companion star of mass greater than 4M⊙. Optical observations in the direction of the pulsar reveal a 16th magnitude B star companion. The PSR J0045−7319 system is likely an x‐ray binary progenitor.
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