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The Orbit of T Tauri South

Published online by Cambridge University Press:  09 August 2007

Rainer Köhler  and
Thorsten Ratzka
Rainer Köhler
Affiliation:
Sterrewacht Leiden, P.O. Box 9513, NL-2300 RA Leiden, The Netherlands email: [email protected]
Thorsten Ratzka
Affiliation:
Max-Planck-Institute for Astronomy, Königstuhl 17, D-69117 Heidelberg, Germany email: [email protected]
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Abstract

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We report on previously unpublished diffraction-limited NIR observations of the young binary star T Tauri South. Orbital elements have been estimated by a least–squares fit to the relative positions. Although the parameters are not well constrained by the observations, we can derive a minimum system mass of about 3 M⊙.

With the most recent astrometric measurements by Duchêne et al. (2006), hyperbolic (unbound) orbits can be excluded with high confidence. We conclude that T Tauri Sb is not in the process of being ejected from the system.

Keywords

techniques: high angular resolutionastrometrybinaries: closestars: fundamental parameters (masses)stars: individual (T Tau)stars: pre–main-sequence
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Symposium S240: Binary Stars as Critical Tools & Tests in Contemporary Astrophysics , August 2006 , pp. 571 - 574
Copyright
Copyright © International Astronomical Union 2007

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