KOI-126: a triply eclipsing hierarchical triple with two low-mass stars |
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| Authors: | Carter Joshua A Fabrycky Daniel C Ragozzine Darin Holman Matthew J Quinn Samuel N Latham David W Buchhave Lars A Van Cleve Jeffrey Cochran William D Cote Miles T Endl Michael Ford Eric B Haas Michael R Jenkins Jon M Koch David G Li Jie Lissauer Jack J MacQueen Phillip J Middour Christopher K Orosz Jerome A Rowe Jason F Steffen Jason H Welsh William F |
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| Institution: | Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA. jacarter@cfa.harvard.edu |
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| Abstract: | The Kepler spacecraft has been monitoring the light from 150,000 stars in its primary quest to detect transiting exoplanets. Here, we report on the detection of an eclipsing stellar hierarchical triple, identified in the Kepler photometry. KOI-126 A, (B, C)], is composed of a low-mass binary masses M(B) = 0.2413 ± 0.0030 solar mass (M(⊙)), M(C) = 0.2127 ± 0.0026 M(⊙); radii R(B) = 0.2543 ± 0.0014 solar radius (R(⊙)), R(C) = 0.2318 ± 0.0013 R(⊙); orbital period P(1) = 1.76713 ± 0.00019 days] on an eccentric orbit about a third star (mass M(A) = 1.347 ± 0.032 M(⊙); radius R(A) = 2.0254 ± 0.0098 R(⊙); period of orbit around the low-mass binary P(2) = 33.9214 ± 0.0013 days; eccentricity of that orbit e(2) = 0.3043 ± 0.0024). The low-mass pair probe the poorly sampled fully convective stellar domain offering a crucial benchmark for theoretical stellar models. |
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