A simple model to describe intrinsic stellar noise for exoplanet detection around red giants
arXiv:1610.08688 · doi:10.1093/mnras/stw2782
Abstract
In spite of the huge advances in exoplanet research provided by the NASA Kepler Mission, there remain only a small number of transit detections around evolved stars. Here we present a reformulation of the noise properties of red-giant stars, where the intrinsic stellar granulation, and the stellar oscillations described by asteroseismology play a key role. The new noise model is a significant improvement on the current Kepler results for evolved stars. Our noise model may be used to help understand planet detection thresholds for the ongoing K2 and upcoming TESS missions, and serve as a predictor of stellar noise for these missions. As an application of our noise model, we explore the minimum detectable planet radii for red giant stars, and find that Neptune sized planets should be detectable around low luminosity red giant branch stars.
Accepted for publication in MNRAS, 9 pages, 10 figures
References in corpus (13)
- The Transiting Exoplanet Survey Satellite
- The connection between stellar granulation and oscillation as seen by the Kepler mission
- Precise Radial Velocities of Giant Stars VII. Occurrence Rate of Giant Extrasolar Planets as a Function of Mass and Metallicity
- Distant future of the Sun and Earth revisited
- An ancient extrasolar system with five sub-Earth-size planets
- The asteroseismic potential of TESS: exoplanet-host stars
- Automated preparation of Kepler time series of planet hosts for asteroseismic analysis
- Retired A Stars and Their Companions II: Jovian planets orbiting kappa Coronae Borealis and HD167042
- Kepler-432: a red giant interacting with one of its two long period giant planets
- Radial Velocity Observations and Light Curve Noise Modeling Confirm That Kepler-91b is a Giant Planet Orbiting a Giant Star
- Kepler-432 b: a massive planet in a highly eccentric orbit transiting a red giant
- The Dynamics of the Multi-planet System Orbiting Kepler-56
- Kepler-432 b: a massive warm Jupiter in a 52-day eccentric orbit transiting a giant star