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Classical Spin-Orbit Coupling and Periastron Advance in PSR J0045–7319

Published online by Cambridge University Press:  12 April 2016

Victoria M. Kaspi
Victoria M. Kaspi*
Affiliation:
IPAC/Caltech/JPL

Abstract

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Radio timing observations of the SMC binary pulsar PSR J0045–7319 show, for the first time in a binary pulsar, that classical spin-orbit coupling and periastron advance are occurring. From the observations, the angle θ between the B star spin axis and the orbital angular momentum is constrained to be 25° < θ < 41° (Kaspi et al. 1996b). Under the conventional assumption that the pre-supernova angular momenta were aligned, this provides direct evidence for an asymmetric supernova explosion. In addition, a large, unexpected orbital decay is observed in the system.

Type
Part 7 Binary Systems
Information
International Astronomical Union Colloquium , Volume 160: Pulsars: Problems and Progress , 1996 , pp. 531 - 532
Copyright
Copyright © Astronomical Society of the Pacific 1996

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