HD144548: A young triply eclipsing system in the Upper Scorpius OB association

Abstract

The star HD144548 (=HIP~78977; TYP~6212-1273-1) has been known as a detached eclipsing binary and a bona-fide member of the Upper Scorpius OB association. Continuous photometry from the K2 mission on Campaign Two has revealed the presence of additional eclipses due to the presence of a third star in the system. These are explained by a system composed of the two previously known members of the eclipsing system (Ba and Bb) with a period of 1.63 d, orbiting around an F7-F8V star with a period of 33.945 +/- 0.002 d in an eccentric orbit (e_A = 0.2652 +/- 0.0003). The timing of the eclipses of Ba and Bb reveals the same 33.9 d periodicity, which we interpret as the combination of a light time effect combined with dynamical perturbations on the close system. Here we combine radial velocities and analytical approximations for the timing of the eclipses to derive masses and radii for the three components of the system. We obtain a mass of 1.44 +/- 0.04 M_sun and radius of 2.41 +/- 0.03 R_sun for the A component, and almost identical masses and radii of about 0.96 M_sun and 1.33 R_sun for each of the two components of the close binary. HD144548 is the first triply eclipsing system for which radial velocities of all components could be measured.

Accepted for publication in A&A Letters

References in corpus (9)

• The K2 Mission: Characterization and Early results
• KOI-126: A Triply-Eclipsing Hierarchical Triple with Two Low-Mass Stars
• Comparative statistics and origin of triple and quadruple stars
• Eclipse Timing Variation Analyses of Eccentric Binaries with Close Tertiaries in the Kepler field
• A Large-Area Search for Low-Mass Objects in Upper Scorpius II: Age and Mass Distributions
• Empirical Isochrones for Low Mass Stars in Nearby Young Associations
• HD 181068: A Red Giant in a Triply-Eclipsing Compact Hierarchical Triple System
• The GAPS Programme with HARPS-N at TNG. VII. Putting exoplanets in the stellar context: magnetic activity and asteroseismology of $\tau$ Bootis A
• Kepler observations of A-F pre-main sequence stars in Upper Scorpius: Discovery of six new $\delta$~Scuti and one $\gamma$~Doradus stars

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