The radial velocity curve of HD 153919 (4U 1700-37) revisited
van Kerkwijk, M. H.; Hammerschlag-Hensberge, G.; Kaper, L.
Netherlands, Canada
Abstract
We have re-analysed all available high-resolution ultraviolet IUE spectra of the high-mass X-ray binary HD 153919/4U 1700-37. The radial velocity semi-amplitude of 20.6 +/- 1.0 km s-1 and orbital eccentricity of 0.22 +/- 0.04 agree very well with the values obtained earlier from optical spectra. They disagree with earlier conclusions for the same data reduced by Heap & Corcoran (\cite{HC92}) and by Stickland & Lloyd (\cite{SL93}).
Based on observations obtained with the International Ultraviolet Explorer.