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Unravelling the Nature of HD 81032 – A New RS CVn Binary
Star-X-ray star-variable star-late-type star-HD 81032
2009/5/12
BVR photometric and quasi-simultaneous optical spectroscopic
observations of the star HD81032 have been carried out during
the years 2000–2004. A photometric period of 18.802 ± 0.07d has been
dete...
We re-analysed the behaviour of coronal activity of the RS CVn-type binaries as a function of stellar and orbital parameters. Highly significant correlations were found between the x-ray luminosity Lx...
Kinematics of RS CVn and W UMa Binaries in the Hipparcos Catalogue
RS CVn W UMa Binaries Hipparcos Catalogue
2010/4/16
Space motions of RS CVn and W UMa binaries have been calculated using parallaxes and proper motions from Hipparcos catalogue and radial velocities from the literature. We have calculating the mean mot...
The orbital angular momentum (orbital AM) of a sample of forty RS CVn-type binaries with the orbital periods P \leq 10 days were estimated and the orbital AM distribution with respect to P was critica...
Short-period RS CVn and W UMa binaries: how are they related?
W Ursae Majoris angular momentum loss
2010/4/16
Two groups of late-type very close main sequence binaries, the so-called short-period RS Canum Venaticorum (RS CVn) and W Ursae Majoris (W UMa) systems, are important for the understanding of the stru...
Co-ordinated Multi-wavelength Observations of the RS CVn System CF Tuc
photometry spectroscopy microwave
2010/4/16
A `multi-site, multi-wavelength' campaign on the eclipsing RS CVn binary CF Tuc was carried out in 1996 over both optical (photometry and spectroscopy) and radio (microwave) ranges. The microwave data...