HD 86590 - A short-period RS Canum Venaticorum binary system

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Binary Stars, Orbital Elements, Stellar Motions, Stellar Spectrophotometry, K Lines, Late Stars, Radial Velocity, White Dwarf Stars

Scientific paper

Radial velocities measured on moderate- and high-dispersion spectrograms taken in 1966 and 1975-79 are used to derive spectroscopic orbital elements for the single-line binary HD 86590. It is determined that the primary is a K0V star, that the secondary is almost certainly a white dwarf, and that the orbital period is 1.070354 days. Photometry employed in this study confirms the presence of the photometric distortion wave reported by Hall, Vaucher and Louth (1979), but the phasing of the wave observed in 1976 and treated here is different from that observed by them in 1979. While there is some evidence that the strong K-line emission is variable, this variation is not correlated with the orbital phase. The lack of detected radio and X-ray emission from this system is seen as consistent with the known properties of other RS CVn binaries.

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