The SDSS-het survey of Kepler eclipsing binaries: Spectroscopic dynamical masses of the Kepler-16 circumbinary planet hosts

Chad F. Bender, Suvrath Mahadevan, Rohit Deshpande, Jason T. Wright, Arpita Roy, Ryan C. Terrien, Steinn Sigurdsson, Lawrence W. Ramsey, Donald P. Schneider, Scott W. Fleming

Research output: Contribution to journalArticle

35 Scopus citations

Abstract

We have used high-resolution spectroscopy to observe the Kepler-16 eclipsing binary as a double-lined system and measure precise radial velocities for both stellar components. These velocities yield a dynamical mass ratio of q = 0.2994 ± 0.0031. When combined with the inclination,i=903401 +0.0016-0.0019 measured from the Kepler photometric data by Doyle et al.(D11), we derive dynamical masses for the Kepler-16 components of M A=0.654 ± 0.017 M and MB = 0.1959 ± 0.0031 M , a precision of 2.5% and 1.5%, respectively. Our results confirm at the 2% level the mass-ratio derived by D11 with their photometric-dynamical model (PDM), q=0.2937 ± 0.0006. These are among the most precise spectroscopic dynamical masses ever measured for low-mass stars and provide an important direct test of the results from the PDM technique.

Original languageEnglish (US)
Article numberL31
JournalAstrophysical Journal Letters
Volume751
Issue number2
DOIs
StatePublished - Jun 1 2012

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

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