Is Momentum Conserved? A Test in the Binary System PSR 1913+16
Abstract
According to some metric theories of gravity, the center of mass of a binary system may be 'selfaccelerated' in the direction of the periastron of the orbit because of a violation of postNewtonian momentum conservation. No such effect occurs in general relativity. Observational constraints on the second time derivative of the period of the pulsar in the binary system PSR 1913 + 16 are shown to tightly constrain such an effect. In the language of the parameterized postNewtonian (PPN) framework, the result is a bound on the PPN parameter zeta_{2} below 4 x 10 exp 5, in agreement with the general relativistic prediction zeta_{2} = 0.
 Publication:

The Astrophysical Journal
 Pub Date:
 July 1992
 DOI:
 10.1086/186451
 Bibcode:
 1992ApJ...393L..59W
 Keywords:

 Binary Stars;
 Gravitational Waves;
 Pulsars;
 Stellar Gravitation;
 Gravitational Fields;
 Neutron Stars;
 Relativistic Theory;
 Solar System;
 Astrophysics;
 GRAVITATION;
 STARS: BINARIES: GENERAL;
 STARS: PULSARS: INDIVIDUAL ALPHANUMERIC: PSR 1913;
 16