Spin–orbit resonance, transit duration variation and possible secular perturbations in KOI‐13

  title={Spin–orbit resonance, transit duration variation and possible secular perturbations in KOI‐13},
  author={Gyula M. Szab'o and Andr'as P'al and Al{\'i}z Derekas and Attila E. Simon and Tam{\'a}s Szalai and L{\'a}szl{\'o} L. Kiss},
  journal={Monthly Notices of the Royal Astronomical Society: Letters},
  • G. Szab'o, A. P'al, +3 authors L. Kiss
  • Published 19 October 2011
  • Physics
  • Monthly Notices of the Royal Astronomical Society: Letters
KOI-13 is the first known transiting system exhibiting light-curve distortions due to gravity darkening of the rapidly rotating host star. In this Letter, we analyse publicly available Kepler Q2–Q3 short-cadence observations, revealing a continuous light variation with a period of Prot = 25.43 ± 0.05 h and a half-amplitude of 21 ppm, which is linked to stellar rotation. This period is in exact 5:3 resonance with the orbit of KOI-13.01, which is the first detection of a spin–orbit resonance in a… 

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