Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007iaus..240..213l&link_type=abstract
Binary Stars as Critical Tools and Tests in Contemporary Astrophysics, International Astronomical Union. Symposium no. 240, he
Astronomy and Astrophysics
Astrophysics
3
Scientific paper
Theta~2~Tau is a detached, "single-lined" binary and the most massive resolved spectroscopic binary of the Hyades cluster. It also shows a complex pattern of pulsations of type Delta Scuti. Its eccentric orbit (e=0.7) has a periodicity of 140.7 days. Component~B is very difficult to detect spectroscopically. For this reason, the few radial velocities published in the literature are inaccurate. From recent high-resolution spectroscopic data obtained with the ELODIE spectrograph at the OHP (France), we derived accurate radial velocities for *both* components applying a spectral disentangling algorithm (by P. Hadrava, 1999). We then combined these measurements with available very-large baseline interferometric data in order to improve the knowledge of the orbital parameters and derived fundamental properties in a self-consistent way. Such determination is also very pertinent to revisit the evolutionary status of both components.
de Cat Peter
Frémat Yves
Hensberge Herman
Lampens Patricia
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