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The new binary pulsar and the observation of gravitational spin precession

Hari, Dass ND and Radhakrishnan, V (1975) The new binary pulsar and the observation of gravitational spin precession. In: Astrophysical Letters and Communications, 16 (4). 135 -139.

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Official URL: http://adsabs.harvard.edu/abs/1975ApL....16..135H

Abstract

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.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Gordon Breach Sci Publ Ltd.
Keywords: Binary stars;gravitational effects;precession;pulsars; relativistic effects;spin-orbit interactions;pulse duration; stellar radiation.
Department/Centre: Division of Physical & Mathematical Sciences > Centre for Theoretical Studies
Date Deposited: 22 Jan 2010 07:07
Last Modified: 22 Jan 2010 07:07
URI: http://eprints.iisc.ernet.in/id/eprint/23780

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