'Off'-state variability in A0538-66, and the validity of orbital solutions

Details 'Off'-state variability in A0538-66, and the validity of orbital solutions 'Off'-state variability in A0538-66, and the validity of orbital solutions

May 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989mnras.238..595s&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 238, May 15, 1989, p. 595-601.

Other

7

Gamma Ray Bursts, H Alpha Line, Magellanic Clouds, Stellar Luminosity, X Ray Sources, Binary Stars, Neutron Stars, Radial Velocity

Scientific paper

The discrepancy between orbital solutions for the high-luminosity LMC X-ray transient A0538-66 derived by Corbet et al. (1985) and by Hutchings et al. (1985) is addressed. Simulation results suggest that these differences are due to low-level residual activity in the system, with the apparent velocity shifts in the spectra being contaminated by weak emission from other places in the system than the B2III primary. It is suggested that the absence of H-alpha and He-II emission can be used as an accurate indication of true nonactivity.

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