High-resolution spectroscopic monitoring of SV Camelopardalis. I. Orbits, absolute masses and radii of the components

Details High-resolution spectroscopic monitoring of SV Camelopardalis. I. Orbits, absolute masses and radii of the components High-resolution spectroscopic monitoring of SV Camelopardalis. I. Orbits, absolute masses and radii of the components

Sep 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002a%26a...392..963l&link_type=abstract

Astronomy and Astrophysics, v.392, p.963-970 (2002)

Astronomy and Astrophysics

Astrophysics

11

Stars: Binaries: Spectroscopic, Stars: Binaries: Eclipsing, Stars: Fundamental Parameters, Stars: Variables: General, Stars: Individual: Sv Cam

Scientific paper

This study is a first part of an analysis of newly obtained time series of high-resolution échelle spectra of the RS CVn star SV Cam. We investigate the radial velocity variations of the spectroscopic binary and derive an improved orbital solution for both components. The results allow us to estimate the masses of the primary to 1.1 Msun and of the secondary to 0.7 Msun and, from a previous analysis of the lightcurve of SV Cam, we derive the stellar radii of 1.18 Rsun for the primary and of 0.76 Rsun for the secondary. From a compilation of eclipse minimum times spanning a period of over 100 years we compute the orbital elements of a hypothetical third body belonging to the SV Cam system. We obtain a period of 52.3 years which is slightly longer than derived by authors before and a much higher eccentricity of at least 0.42. From the mass function there follows a lower limit to the third body mass of 0.17 Msun. The applied procedure also provides an optimized period of eclipses of 0.59307180 deg.

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