Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...211.5703s&link_type=abstract
American Astronomical Society, AAS Meeting #211, #57.03; Bulletin of the American Astronomical Society, Vol. 39, p.830
Astronomy and Astrophysics
Astronomy
Scientific paper
Using the Keck Interferometer, we spatially resolved the orbit of the pre-main sequence binary, Haro 1-14c, for the first time. We present these interferometric observations along with additional spectroscopic radial velocity measurements of the components. We performed a simultaneous orbit fit to the interferometric visibilities and the radial velocities of Haro 1-14c. Based on a statistical analysis of the possible orbital solutions that fit the data, we determined component masses of M1 = 0.91+0.20-0.02 Msun and M2 = 0.312+0.071-0.005 Msun for the primary and secondary, respectively, and a distance to the system of 104+22-25 pc. The distance measurement is consistent with the close estimates of the distance to the Ophiuchus molecular cloud. Comparing our results with evolutionary tracks suggests an age of 3-4 Myr for Haro 1-14c. With additional interferometric measurements to improve the uncertainties in the masses and distance, we expect the low-mass secondary to provide important empirical data for calibrating the theoretical evolutionary tracks for pre-main sequence stars.
Barman Travis
Prato Lisa
Schaefer Gail
Simon Manfred
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