A 2% Parallax for T Tauri South from the VLBA

Details A 2% Parallax for T Tauri South from the VLBA A 2% Parallax for T Tauri South from the VLBA

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...20515603m&link_type=abstract

American Astronomical Society Meeting 205, #156.03; Bulletin of the American Astronomical Society, Vol. 36, p.1608

Astronomy and Astrophysics

Astronomy

Scientific paper

We present multi-epoch Very Long Baseline Array (VLBA) observations of the non-thermal radio source associated with T Tauri South. These observations show a compact source which is most likely associated with the magnetosphere of the underlying pre-main sequence star. We obtain absolute astrometry with the VLBA to an error of 0.25 mas, which allows a very precise measurement of the trigonometric parallax and proper motion of T Tauri South. The trigonometric parallax is π =7.07 ± 0.14 mas, corresponding to a distance of 141.52+2.81 -2.81 pc. There is some indication that the compact radio source in T Tauri South is slightly resolved, with an faint extension which may arise from from reconnection flares at the star-disk surface.

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