Eclipsing binaries in the open cluster Ruprecht 147. III: The triple system EPIC 219552514 at the main-sequence turnoff

Abstract

Spectroscopic observations are reported for the 2.75 day, double-lined, detached eclipsing binary EPIC 219552514 located at the turnoff of the old nearby open cluster Ruprecht 147. A joint analysis of our radial velocity measurements and the K2 light curve leads to masses of M1 = 1.509 (+0.063 / -0.056) MSun and M2 = 0.649 (+0.015 / -0.014) MSun for the primary and secondary, along with radii of R1 = 2.505 (+0.026 / -0.031) RSun and R2 = 0.652 (+0.013 / -0.012) RSun, respectively. The effective temperatures are 6180 +/- 100 K for the F7 primary and 4010 +/- 170 K for the late K secondary. The orbit is circular, and the stars' rotation appears to be synchronized with the orbital motion. This is the third eclipsing system analyzed in the same cluster, following our earlier studies of EPIC 219394517 and EPIC 219568666. By comparison with stellar evolution models from the PARSEC series, we infer an age of 2.67 (+0.39 / -0.55) Gyr that is consistent with the estimates for the other two systems. EPIC 219552514 is a hierarchical triple system, with the period of the slightly eccentric outer orbit being 463 days. The unseen tertiary is either a low-mass M dwarf or a white dwarf.

arXiv comment12 pages in emulateapj format, including figures and tables. Accepted for publication in The Astrophysical Journal

References in corpus (33)

• emcee: The MCMC Hammer
• Gaia Data Release 2. Summary of the contents and survey properties
• MESA Isochrones and Stellar Tracks (MIST). I: Solar-Scaled Models
• Gaia Data Release 2: The astrometric solution
• A new extensive library of PHOENIX stellar atmospheres and synthetic spectra
• Accurate masses and radii of normal stars: modern results and applications
• The Revised TESS Input Catalog and Candidate Target List
• Efficient, uninformative sampling of limb darkening coefficients for two-parameter laws
• The Eccentric Kozai-Lidov Effect and Its Applications
• An absolutely calibrated effective temperature scale from the InfraRed Flux Method
• Improving PARSEC models for very low mass stars
• A Technique for Extracting Highly Precise Photometry for the Two-Wheeled Kepler Mission
• On the use of empirical bolometric corrections for stars
• Tertiary companions to close spectroscopic binaries
• Nominal values for selected solar and planetary quantities: IAU 2015 Resolution B3
• Binning is sinning: morphological light-curve distortions due to finite integration time
• Initial Characteristics of Kepler Short Cadence Data
• The Impact of Stellar Multiplicity on Planetary Systems, I.: The Ruinous Influence of Close Binary Companions
• Planetary Candidates from the First Year of the K2 Mission
• Mapping the Shores of the Brown Dwarf Desert I.: Upper Scorpius
• A Kepler Study of Starspot Lifetimes with Respect to Light Curve Amplitude and Spectral Type
• LSPM J1112+7626: detection of a 41-day M-dwarf eclipsing binary from the MEarth transit survey
• Spectroscopic binaries in a sample of ROSAT X-ray sources south of the Taurus molecular clouds
• Empirical metallicity-dependent calibrations of effective temperature against colours for dwarfs and giants based on interferometric data
• Fundamental properties of lower main-sequence stars
• Phase Errors in Diffraction-Limited Imaging: Contrast Limits for Sparse Aperture Masking
• Ruprecht 147: The oldest nearby open cluster as a new benchmark for stellar astrophysics
• Ruprecht 147: a paradigm of dissolving star cluster
• Ruprecht 147 DANCe I. Members, empirical isochrone, luminosity and mass distributions
• K2-231 b: A sub-Neptune exoplanet transiting a solar twin in Ruprecht 147
• Eclipsing binaries in the open cluster Ruprecht 147. I: EPIC 219394517
• Absolute dimensions of the eccentric eclipsing binary V541 Cygni
• Eclipsing binaries in the open cluster Ruprecht 147. II: EPIC 219568666

Cited by in corpus (9)

• When Do Stalled Stars Resume Spinning Down? Advancing Gyrochronology with Ruprecht 147
• The Empirical Limits of Gyrochronology
• Age and helium content of the open cluster NGC 6791 from multiple eclipsing binary members. III. Constraints from a subgiant
• Rotation periods for cool stars in the open cluster Ruprecht 147 (NGC 6774): Implications for gyrochronology
• Using the Gaia excess uncertainty as a proxy for stellar variability and age
• Fundamental Properties of Late-Type Stars in Eclipsing Binaries
• Kepler main-sequence solar-like stars: surface rotation and magnetic-activity evolution
• TOI-712: a system of adolescent mini-Neptunes extending to the habitable zone
• Eclipsing binaries in the open cluster Ruprecht 147. IV: The active triple system EPIC 219511354