Measurement of gravitational spin-orbit coupling in a binary pulsar system

Details Measurement of gravitational spin-orbit coupling in a binary pulsar system Measurement of gravitational spin-orbit coupling in a binary pulsar system

2004-08-25

arxiv.org/abs/astro-ph/0408457v1

Phys.Rev.Lett. 93 (2004) 141101

Astronomy and Astrophysics

Astrophysics

4 pages, accepted to PRL. Version with high-resolution figure 2 available at http://www.astro.ubc.ca/people/stairs/papers/sta0

Scientific paper

10.1103/PhysRevLett.93.141101

In relativistic gravity, a spinning pulsar will precess as it orbits a compact companion star. We have measured the effect of such precession on the average shape and polarization of the radiation from PSR B1534+12. We have also detected, with limited precision, special-relativistic aberration of the revolving pulsar beam due to orbital motion. Our observations fix the system geometry, including the misalignment between the spin and orbital angular momenta, and yield a measurement of the precession timescale consistent with the predictions of General Relativity.

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