An alternative to mode fitting

Abstract

The space mission CoRoT provides us with a large amount of high-duty cycle long-duration observations. Mode fitting has proven to be efficient for the complete and detailed analysis of the oscillation pattern, but remains time consuming. Furthermore, the photometric background due to granulation severely complicates the analysis. Therefore, we attempt to provide an alternative to mode fitting, for the determination of large separations. With the envelope autocorrelation function and a dedicated filter, it is possible to measure the variation of the large separation independently for the ridges with even and odd degrees. The method appears to be as accurate as the mode fitting. It can be very easily implemented and is very rapid.

Proceedings of the 4th HELAS International Conference held in Lanzarote, 2010

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• Probing the core structure and evolution of red giants using gravity-dominated mixed modes observed with Kepler
• Mixed modes in red-giant stars observed with CoRoT
• Granulation in Red Giants: observations by the Kepler mission and 3D convection simulations
• Asteroseismology from multi-month Kepler photometry: the evolved Sun-like stars KIC 10273246 and KIC 10920273
• Solar-like oscillations in KIC11395018 and KIC11234888 from 8 months of Kepler data
• Red giant seismology: observations