Thursday, June 20, 2013

1306.4393 (M. Simon et al.)

Masses and Distance of the Young Binary NTTS 045251+3016    [PDF]

M. Simon, G. H. Schaefer, L. Prato, Dary Ruiz-Rodriguez, N. Karnath, O. G. Franz, L. H. Wasserman
As part of our continuing campaign to measure the masses of pre-main sequence stars dynamically and thus to assess the reliability of the discrepant theoretical calculations of contraction to the main sequence, we present new results for NTTS 045251+3016, a visual and double-lined spectroscopic binary in the Taurus Star Forming Region. We obtained new high angular resolution astrometry and high spectral resolution spectroscopy at Keck Observatory. The new data lead to a significant revision of previously published orbital parameters. In particular, we find that the masses of the primary and secondary are 0.86+/-0.11 and 0.55+/-0.05 M_sun, respectively, smaller than previously reported, and that the system lies 158.7+/-3.9 pc from the sun, further than previously reported.
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