VLBA Determination of the Distance to Taurus and Ophiuchus with 1% Precision

Details VLBA Determination of the Distance to Taurus and Ophiuchus with 1% Precision VLBA Determination of the Distance to Taurus and Ophiuchus with 1% Precision

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...20913303l&link_type=abstract

2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #133.03; Bulletin of the American Astronomical Society,

Astronomy and Astrophysics

Astronomy

Scientific paper

Using multi-epoch VLBA observations spread over one to two years of T Tauri stars in the Taurus and Rho-Ophiuchus star-forming regions, we have measured the trigonometric parallax, and therefore the distance, of these two important regions of star-formation with a precision of about 1%. Since several sources have been considered in each case, we can estimate the depth of the clouds, as well as their mean distance. We also measured the proper motions of the sources, and can therefore determine their velocity vectors. In the case of Taurus, significant velocity differences are found between the southern part of the cloud (where T Tau is located) and the central regions.

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