Masses of the components of SB2s observed with Gaia - II. Masses derived from PIONIER interferometric observations for Gaia validation

J. L. Halbwachs, H. M.J. Boffin, J. B. Le Bouquin, F. Kiefer, B. Famaey, J. B. Salomon, F. Arenou, D. Pourbaix, F. Anthonioz, R. Grellmann, S. Guieu, H. Sana, P. Guillout, A. Jorissen, Y. Lebreton, T. Mazeh, L. Tal-Or, A. Nebot Gómez-Morán

Research output: Contribution to journalArticlepeer-review

Abstract

In anticipation of the Gaia astrometric mission, a sample of spectroscopic binaries is being observed since 2010 with the Spectrograph pour l'Observation des PHénomènes des Intérieurs stellaires et des Exoplanètes (SOPHIE) spectrograph at the Haute-Provence Observatory. Our aim is to derive the orbital elements of double-lined spectroscopic binaries (SB2s) with an accuracy sufficient to finally obtain the masses of the components with relative errors as small as 1 per cent when combined with Gaia astrometric measurements. In order to validate the masses derived from Gaia, interferometric observations are obtained for three SB2s in our sample with F-K components: HIP 14157, HIP 20601 and HIP 117186. The masses of the six stellar components are derived. Due to its edge-on orientation, HIP 14157 is probably an eclipsing binary. We note that almost all the derived masses are a few per cent larger than the expectations from the standard spectral type-mass calibration and mass-luminosity relation. Our calculation also leads to accurate parallaxes for the three binaries, and the Hipparcos parallaxes are confirmed.

Original languageEnglish
Pages (from-to)3303-3311
Number of pages9
JournalMonthly Notices of the Royal Astronomical Society
Volume455
Issue number3
DOIs
StatePublished - 21 Jan 2016

Keywords

  • Binaries: spectroscopic
  • Binaries: visual
  • Stars: fundamental parameters
  • Stars: individual: HIP 117186
  • Stars: individual: HIP 14157
  • Stars: individual: HIP 20601

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