Distance, 3D Structure, And Kinematics Of Taurus And Ophiuchus From Vlba Observations

Details Distance, 3D Structure, And Kinematics Of Taurus And Ophiuchus From Vlba Observations Distance, 3D Structure, And Kinematics Of Taurus And Ophiuchus From Vlba Observations

Jan 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21332703t&link_type=abstract

American Astronomical Society, AAS Meeting #213, #327.03; Bulletin of the American Astronomical Society, Vol. 41, p.383

Astronomy and Astrophysics

Astronomy

Scientific paper

We have used the Very Long Baseline Array to measure the trigonometric parallax and proper motion of several young stars in the Taurus and Ophiuchus star-forming regions. These data were used to measure the mean distance, three-dimensional structure, and kinematics of Taurus and Ophiuchus with unprecedented accuracy. The high angular resolution ( 1 mas) radio images that were gathered for this project also reveal interesting new characteristics of these objects. Perhaps the most interesting such characteristic is the high detection rate ( 55%) of very tight binaries (with separations of a only few mas; 0.3 AU) in our sample. Selection effects almost certainly contribute to this high detected multiplicity rate, and will be discussed.

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