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About SSI

In the context of the space missions CoRoT and Kepler, we have developed the present data base containing Stellar Seismic Indices (SSI) derived in a homogeneous way for a very large set of CoRoT and Kepler targets. In addition to these seismic indices, the data base also provides the characteristic parameters of the stellar granulation, namely the time-scale (tau_eff) and the mean-square brightness fluctuations (sigma┬▓) associated with the granulation background.

All these stellar parameters were generated on the basis of the MLEUP method (de Assis Peralta, Samadi, Michel, 2018, AN, in press). This new method relies on the Universal Pattern (Mosser et al., 2011) and takes advantage of the Maximum Likelihood Estimator (MLE) algorithm. It provides simultaneously and in a consistent way both the seismic indices and the characteristic parameters of the stellar granulation.

The indices populating the current data base were extracted from all Kepler long-cadence light-curves and from all CoRoT light curves acquired in the faint field (exo channel) with a duration longer than 50 days.

A total of about 320,000 light-curves have been analysed, among which
stellar indices (seismic and granulation parameters) were extracted for a total number of about 20,000 red giants.

Access to the data is possible through the Search interface as well as through the Seismic Plus portal.

If you use these data please refers to the following paper: "A new method for extracting seismic indices and granulation parameters: results for more than 20,000 CoRoT and Kepler red giants", de Assis Peralta, Samadi, Michel, 2018, published in Astronomische Nachrichten.

Note: Masses, radii and log g can typically be derived using seismic scaling relations from the provided seismic indices and given effective temperature measurements obtained from other data bases ; to derive the parameters of the stars (M,R, log g) from the seismic indices see e.g. this note. To learn more about the seismic scaling relations, please have a look to the list of articles and reviews given in the section Documents. Also, The Seismic Plus portal implements a tool to derive masses, radii, and log g from the various data bases that provide effective temperatures and seismic indices.

This project is run by Observatoire de Paris -LESIA with the support of the PADC.
It was developed in the framework of the SPACEInn project financed by the European Union under the Seventh Framework Programme (FP7). It has also benefited from the support of the Programme National de Physique Stellaire (PNPS).

The CoRoT space mission has been developed and operated by CNES, with contributions from Austria, Belgium, Brazil, ESA (RSSD and Science Program), Germany, and Spain. Funding for the Kepler Discovery
mission were provided by NASAs Science Mission Directorate.