Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975apl....16..135h&link_type=abstract
Astrophysical Letters, vol. 16, no. 4, 1975, p. 135-139.
Astronomy and Astrophysics
Astrophysics
22
Binary Stars, Gravitational Effects, Precession, Pulsars, Relativistic Effects, Spin-Orbit Interactions, Pulse Duration, Stellar Radiation
Scientific paper
The possibility of observing gravitational spin precession due to spin-orbit coupling in a binary pulsar system is considered. An analysis is presented which can aid in delineating the relevant physical effects from pulse-structure data. In this analysis, it is assumed that the pulsar radiation emanates from a cone whose axis is tilted with respect to the axis of rotation. It is found that the time-averaged pulse width and polarization sweep vary periodically with time and that this variation has a periodicity of the order of the spin-precession frequency averaged over a complete revolution. It is concluded that for an orbital period of about 180 years, it suffices to measure polarization data with an accuracy of a few parts in 100 over a period of six months to a year in order to uncover the effects of spin precession. The consistency of the analysis is checked, and the calculations are applied to a recently discovered binary pulsar.
Hari Dass N. D.
Radhakrishnan Venkatesh
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