Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010mnras.406.2663r&link_type=abstract
Monthly Notices of the Royal Astronomical Society, Volume 406, Issue 4, pp. 2663-2670.
Astronomy and Astrophysics
Astronomy
3
Binaries: General, Stars: Emission Line, Be, Stars: Individual: 4U0115+63, Stars: Individual: V0332+53, Stars: Individual: 2S1417-624, X-Rays: Binaries
Scientific paper
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 4U0115+63. We also present new and accurate orbital parameters of the Be/X-ray binaries V0332+53 and 2S1417-624.
Paul Biswajit
Raichur Harsha
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