Extreme variability in the Be-type, periodic recurrent X-ray transient A0538-66 - A highly eccentric interacting binary

Details Extreme variability in the Be-type, periodic recurrent X-ray transient A0538-66 - A highly eccentric interacting binary Extreme variability in the Be-type, periodic recurrent X-ray transient A0538-66 - A highly eccentric interacting binary

Feb 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983mnras.202..657c&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 202, Feb. 1983, p. 657-682.

Astronomy and Astrophysics

Astronomy

97

Binary Stars, Neutron Stars, Stellar Atmospheres, Stellar Spectrophotometry, Variable Stars, X Ray Sources, Gravitational Effects, Iue, Spectrum Analysis, Stellar Envelopes, Stellar Spectra

Scientific paper

The recurrent X-ray transient sources represent a substantial class of galactic objects which are difficult to study extensively. They can be divided into two groups on the basis of their optical primaries, including the low-mass systems which are optically faint outside their outbursts, and those with high masses. White and Carpenter (1978) discovered the periodic recurrent transient X-ray source A0538-66. The present investigation is concerned with an eccentric binary model of A0538-66, in which the neutron star is effectively imbedded in the primary's extended atmosphere at periastron. It is suggested that X-ray emission outside periastron is due to accretion from gravitationally bound gas, perhaps in the form of a disk around the compact object obtained during the previous periastron passage.

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