Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993stin...9427440c&link_type=abstract
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Astronomy and Astrophysics
Astronomy
Mass Transfer, Orbital Elements, Pulsars, Radio Bursts, Stellar Radiation, X Ray Stars, Apsides, B Stars, Companion Stars, Light Curve, X Ray Astronomy
Scientific paper
4U0115+63 is a recurrent transient X-ray pulsar in a moderately eccentric orbit with a Be star companion, V635 Cas. Many outbursts from this system have been reported over the past twenty years; yet despite the apparent relation between optical outbursts from the companion star and subsequent X-ray transient events, the physical mechanism for the mass transfer in the system remains unclear. In this paper, we present the preliminary results of analysis of observations made using BATSE during the 1991 April outburst from this system. This outburst does not fit the pattern of three year recurrence intervals previously suggested by Whitlock, Roussel-Dupre and Priedhorsky (1989). The orbital elements of the system have been updated and do not support the claim of Tamura et al., (1992) that apsidal motion was detected in this system based on the 1990 Ginga outburst.
Cominsky Lynn
Finger Mark H.
Roberts Mallory
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