On the time delay in binary systems

Details On the time delay in binary systems On the time delay in binary systems

2005-01-19

arxiv.org/abs/gr-qc/0501059v2

Phys.Rev. D71 (2005) 023003

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

7 pages, 2 eps figures, RevTex, to appear in Physical Review D

Scientific paper

10.1103/PhysRevD.71.023003

The aim of this paper is to study the time delay on electromagnetic signals propagating across a binary stellar system. We focus on the antisymmetric gravitomagnetic contribution due to the angular momentum of one of the stars of the pair. Considering a pulsar as the source of the signals, the effect would be manifest both in the arrival times of the pulses and in the frequency shift of their Fourier spectra. We derive the appropriate formulas and we discuss the influence of different configurations on the observability of gravitomagnetic effects. We argue that the recently discovered PSR J0737-3039 binary system does not permit the detection of the effects because of the large size of the eclipsed region.

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