Dynamical Mass of the T Tau Sa-Sb Binary

Details Dynamical Mass of the T Tau Sa-Sb Binary Dynamical Mass of the T Tau Sa-Sb Binary

Dec 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003aas...203.0508s&link_type=abstract

American Astronomical Society Meeting 203, #05.08; Bulletin of the American Astronomical Society, Vol. 35, p.1211

Astronomy and Astrophysics

Astronomy

Scientific paper

It is possible to derive a useful value for the dynamical mass of a binary system even if a complete orbit has not yet been observed. By considering the distribution of masses produced by orbital solutions that lie within a variation of 1 from the minimum in the reduced χ2 surface, an estimate of the total mass can be derived. We apply this technique to the infrared measurements of the resolved T Tau Sa-Sb binary. This pair, currently separated by ˜ 0.1'' is located ˜ 0.7'' south of T Tau N. Curvature is already apparent in the orbital motion of Tau Sa-Sb. Although the range of possible orbital parameters is still large, the total mass lies within the range 3.7 (+2.8/-1.6) Msun. Comparing this value to the masses of T Tau N and T Tau Sb estimated from their spectral types, indicates that the IR companion, T Tau Sa, is the most massive component.

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