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Apsidal motion in 4U 0115+63 and orbital parameters of 2S 1417-624 and V0332+53

Raichur, Harsha and Paul, Biswajit (2010) Apsidal motion in 4U 0115+63 and orbital parameters of 2S 1417-624 and V0332+53. In: Monthly Notices of the Royal Astronomical Society, 406 (4). pp. 2663-2670.

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Official URL: http://onlinelibrary.wiley.com/doi/10.1111/j.1365-...


Be/X-ray binary pulsars have wide eccentric orbits and hence the angle of periastron of the orbit is very well defined in these sources. The presence of an X-ray pulsar allows for accurate measurements of orbital elements. A Be star usually is a rapidly rotating star and hence will deviate from spherical geometry. The tidal interaction between the neutron star and the Be star will add to the distortion of the Be star and alter its mass distribution. Thus a measurable rate of apsidal motion is expected from these systems. In this paper, we present the first conclusive detection of apsidal motion of the binary 4U 0115+63. We also present new and accurate orbital parameters of the Be/X-ray binaries V0332+53 and 2S 1417-624.

Item Type: Journal Article
Publication: Monthly Notices of the Royal Astronomical Society
Publisher: John Wiley & Sons
Additional Information: Copyright of this article belongs to John Wiley & Sons.
Keywords: Binaries:general;stars:emission line;Be;stars:individual: 4U 0115+63;stars:individual:V0332+53;stars:individual:2S 1417-624 X-rays: binaries.
Department/Centre: Division of Physical & Mathematical Sciences > Joint Astronomy Programme
Date Deposited: 23 Aug 2010 10:12
Last Modified: 23 Aug 2010 10:12
URI: http://eprints.iisc.ac.in/id/eprint/31488

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