Relativistic Spin Precession in the Double Pulsar

Details Relativistic Spin Precession in the Double Pulsar Relativistic Spin Precession in the Double Pulsar

2008-07-16

arxiv.org/abs/0807.2644v1

Science 321:104-107,2008

Astronomy and Astrophysics

Astrophysics

28 pages, 6 figures, 1 table, 2 movies

Scientific paper

10.1126/scien=

The double pulsar PSR J0737-3039A/B consists of two neutron stars in a highly relativistic orbit that displays a roughly 30-second eclipse when pulsar A passes behind pulsar B. Describing this eclipse of pulsar A as due to absorption occurring in the magnetosphere of pulsar B, we successfully use a simple geometric model to characterize the observed changing eclipse morphology and to measure the relativistic precession of pulsar B's spin axis around the total orbital angular momentum. This provides a test of general relativity and alternative theories of gravity in the strong-field regime. Our measured relativistic spin precession rate of 4.77 (+0.66,-0.65) degrees per year (68% confidence level) is consistent with that predicted by general relativity within an uncertainty of 13%.

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