Preliminary orbit of the young binary haro 1-14c

G. H. Schaefer, M. Simon, L. Prato, T. Barman

Research output: Contribution to journalArticle

23 Scopus citations

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 languageEnglish (US)
Pages (from-to)1659-1668
Number of pages10
JournalAstronomical Journal
Volume135
Issue number5
DOIs
StatePublished - 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

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