Classical Spin - Orbit Coupling and Periastron Advance
نویسنده
چکیده
Radio timing observations of the SMC binary pulsar PSR J0045?7319 show, for the rst time in a binary pulsar, that classical spin-orbit coupling and periastron advance are occurring. From the observations , the angle between the B star spin axis and the orbital angular momentum is constrained to be 25 < < 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.
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