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- W3148768286 abstract "We present preliminary results of our grid based modelling (GBM) of the dwarf/subgiant sample of stars observed with Kepler including global asteroseismic parameters. GBM analysis in this work is based on a large grid of stellar models that is characterized by five independent parameters: model mass and age, initial metallicity ($zini$), initial helium ($yini$), and mixing length parameter ($alpha_{mlt}$). Using this grid relaxes assumptions used in all previous GBM work where the initial composition is determined by a single parameter and that $alpha_{mlt}$ is fixed to a solar-calibrated value. The new grid allows us to study, for example, the impact of different galactic chemical enrichment models on the determination of stellar parameters such as mass radius and age. Also, it allows to include new results from stellar atmosphere models on $alpha_{mlt}$ in the GBM analysis in a simple manner. Alternatively, it can be tested if global asteroseismology is a useful tool to constraint our ignorance on quantities such as $yini$ and $alpha_{mlt}$. Initial findings show that mass determination is robust with respect to freedom in the latter quantities, with a 4.4% maximum deviation for extreme assumptions regarding prior information on $yini-zini$ relations and $alpha_{mlt}$. On the other hand, tests carried out so far seem to indicate that global seismology does not have much power to constrain $yini-zini$ relations of $alpha_{mlt}$ values without resourcing to additional information." @default.
- W3148768286 created "2021-04-13" @default.
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- W3148768286 date "2017-01-01" @default.
- W3148768286 modified "2023-10-16" @default.
- W3148768286 title "The more the merrier: grid based modelling of Kepler dwarfs with 5-dimensional stellar grids" @default.
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- W3148768286 doi "https://doi.org/10.1051/epjconf/201716003011" @default.
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