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Post-Keplerian parameter to test gravitomagnetic effects in binary pulsar systems

2005; American Physical Society; Volume: 72; Issue: 8 Linguagem: Inglês

10.1103/physrevd.72.084030

1550-7998

Matteo Luca Ruggiero, Angelo Tartaglia,

Stellar, planetary, and galactic studies

We study the pulsar timing, focusing on the time delay induced by the gravitational field of the binary systems. In particular, we study the gravitomagnetic correction to the Shapiro time delay in terms of Keplerian and post-Keplerian parameters, and we introduce a new post-Keplerian parameter which is related to the intrinsic angular momentum of the stars. Furthermore, we evaluate the magnitude of these effects for the binary pulsar systems known so far. The expected magnitude is indeed small, but the effect is important per se.