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Seismology of the Sun and the Distant Stars 2016
Using Today’s Successes to Prepare the Future
Joint TASC2 & KASC9 Workshop – SPACEINN & HELAS8 Conference



The more the merrier: grid based modeling of Kepler dwarfs with 5-dimensional stellar grids.
Aldo Serenelli (Instituto de Ciencias del Espacio (ICE/CSIC-IEEC)), Daniel Huber (Institute for Astronomy, University of Sydney), William Chaplin (School of Physics and Astronomy, University of Birmingham)

Most of the work done so far on determination of stellar parameters based on global seismology (Dnu and numax) has employed the simplest possible grids of stellar models where age, [Fe/H] and mass define the parameter space. We extend the grid used in BeSPP in two additional dimensions: initial helium abundance and mixing length parameter. This opens up the possibility of determining stellar parameters in a less constrained way compared to was is generally done. Also, such new grid of models allows simple testing of, for example different galactic chemical enrichment laws (DY/DZ), results on mixing length parameter obtained from 3D RHD stellar envelope models. This can be done simply by including appropriate priors in the statistical extraction of stellar parameters. Here, we present initial results of such type of analysis for the sample of Kepler dwarfs and subdwarfs.

Instituto de Astrofísica e Ciências do Espaço Universidade do Porto Faculdade de Ciências da Universidade de Lisboa
Fundação para a Ciência e a Tecnologia COMPETE 2020 PORTUGAL 2020 União Europeia