Abstract
Using the Keck Interferometer, we spatially resolved the orbit of the pre-main-sequence (PMS) 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 M 1 = 0.96+0.27 -0.08 M ⊙ and M 2 = 0.33+0.09 -0.02 M ⊙ for the primary and secondary, respectively, and a distance to the system of 111+19 -18 pc. The distance measurement is consistent with the close distance estimates of 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 PMS stars.
Original language | English (US) |
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Pages (from-to) | 1659-1668 |
Number of pages | 10 |
Journal | Astronomical Journal |
Volume | 135 |
Issue number | 5 |
DOIs | |
State | Published - May 1 2008 |
Keywords
- Binaries: spectroscopic
- Binaries: visual
- Stars: fundamental parameters
- Stars: individual (Haro 1-14c)
- Stars: pre-main sequence
- Techniques: interferometric
ASJC Scopus subject areas
- Astronomy and Astrophysics
- Space and Planetary Science