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

@article{Szabo2011SpinorbitRT,
  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},
  year={2011},
  volume={421}
}
  • 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… Expand

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References

SHOWING 1-10 OF 16 REFERENCES
ASYMMETRIC TRANSIT CURVES AS INDICATION OF ORBITAL OBLIQUITY: CLUES FROM THE LATE-TYPE DWARF COMPANION IN KOI-13
KOI-13.01, a planet-sized companion in an optical double star, was announced as one of the 1235 Kepler planet candidates in 2011 February. The transit curves show significant distortion that wasExpand
Measurement of the Spin-Orbit Misalignment of KOI-13.01 from its Gravity-Darkened Kepler Transit Lightcurve
We model the asymmetry of the KOI-13.01 transit lightcurve assuming a gravity-darkened rapidly rotating host star in order to constrain the system's spin-orbit alignment and transit parameters. WeExpand
DETECTION OF KOI-13.01 USING THE PHOTOMETRIC ORBIT
We use the KOI-13 transiting star-planet system as a test case for the recently developed BEER algorithm, aimed at identifying non-transiting low-mass companions by detecting the photometricExpand
Periastron precession measurements in transiting extrasolar planetary systems at the level of general relativity
Transiting exoplanetary systems are surpassingly important among the planetary systems since they provide the widest spectrum of information for both the planet and the host star. If a transitingExpand
Rotation and oblique pulsation in Kepler observations of the roAp star KIC 10483436
Photometry of KIC 10483436 was obtained continuously with 1-min exposures over a 27-d period from the Kepler satellite. The light curve shows rotational variations from surface spots with a period ofExpand
Transit Lightcurves of Extrasolar Planets Orbiting Rapidly-Rotating Stars
Main-sequence stars earlier than spectral-type ~F6 or so are expected to rotate rapidly due to their radiative exteriors. This rapid rotation leads to an oblate stellar figure. It also induces theExpand
Spin-orbit resonance and the evolution of compact binary systems
Starting with a post-Newtonian description of compact binary systems, we derive a set of equations that describes the evolution of the orbital angular momentum and both spin vectors during inspiral.Expand
Tidal evolution of eccentric orbits in massive binary systems. II. Coupled resonance locking for two rotating main sequence stars
We extend our study of the tidal evolution of elliptic binary systems to the case of a system consisting of two $10 M_\odot$ uniformly rotating main sequence stars. Previous work showed that in aExpand
The Kepler characterization of the variability among A- and F-type stars I. General overview
Context. The Kepler spacecraft is providing time series of photometric data with micromagnitude precision for hundreds of A-F type stars. Aims. We present a first general characterization of theExpand
Rotational light variations in Kepler observations of A-type stars
We analyse the light curves of over 9000 A–F stars in the first public release of Kepler data and examine the noise properties in constant or nearly constant stars. For the A stars, we find aExpand
...
1
2
...