A fourth component in the young multiple system V 773 Tau

Details A fourth component in the young multiple system V 773 Tau A fourth component in the young multiple system V 773 Tau

2003-05-20

arxiv.org/abs/astro-ph/0305360v1

Astron.Astrophys. 406 (2003) 685-690

Astronomy and Astrophysics

Astrophysics

Accepted by Astronomy and Astrophysics, 5 pages, 2 figures

Scientific paper

10.1051/0004-6361:20030805

I report on a new component in the pre-main sequence multiple system V 773 Tauri. This second visual companion, V 773 Tau C, with a projected separation of about 0."2 has been detected using speckle interferometry in the near-infrared. Repeated observations from 1996 to 2002 show significant orbital motion and thus confirm the character of the new companion as a gravitationally bound star. Together with the two components of the spectroscopic binary V 773 Tau A and the previously known visual companion V 773 Tau B, the V 773 Tau system appears as a young "mini-cluster" of four T Tauri stars within a sphere of a radius less than 100 AU. V 773 Tau, A, B and C form a triple system that is not hierarchic, but is apparently stable despite of this. The brightness of V 773 Tau C has probably increased over the last years, which may explain its non-detection in previous binary surveys.

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