Volume 524, December 2010
|Number of page(s)||5|
|Section||Stellar structure and evolution|
|Published online||19 November 2010|
The O-type eclipsing binary SZ Camelopardalis revisited⋆
1 Astronomical Institute of the Charles University, Faculty of
Mathematics and Physics, V Holešovičkách 2, 180 00 Praha 8, Czech Republic
2 Dr. Remeis-Sternwarte, Astronomisches Institut der Universität Erlangen-Nürnberg, Sternwartstraße 7, 96049 Bamberg, Germany
3 Astronomical Institute, Academy of Sciences of the Czech Republic, Fričova 298, 251 65 Ondřejov, Czech Republic
Accepted: 24 October 2010
We analyse new spectra of the multiple system SZ Cambecause previous studies found different values of the primary radial velocity amplitude. The older solutions of light curves also have different ratios of secondary to primary luminosity as inferred from the observed equivalent widths of spectral lines. We therefore reanalyse the light curves of the eclipsing pair. Only the light curve derived by Wesselink has a solution that agrees with the observed equivalent width ratio. The resulting parameters of the binary are discussed. Masses of M1 = 16.6 and M2 = 11.9 M⊙, and radii R1 = 9.4 and R2 = 5.4 R⊙ are derived. We point out that radial velocities measured with the CCF method can be misleading when the method is applied to multiple systems with complex line blends. New radial velocities are also obtained for the visual component ADS 2984 A (HD 25639).
Key words: binaries: eclipsing / stars: early-type / stars: fundamental parameters / stars: individual: SZ Cam / stars: individual: ADS 2984 A
© ESO, 2010
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.