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Abstract: We present two independent methods for studying the global stellar parameterspace mass M, age, initial chemical composition X 0, Z 0 of HD 49933 withseismic data. Using a local minimization and an MCMC algorithm, we obtainconsistent results for the determination of the stellar properties: M = 1.1 -1.2 M solar, Age ~ 3.0 Gyr, Z 0 ~ 0.008. A description of the error ellipsescan be defined using Singular Value Decomposition techniques, and this isvalidated by comparing the errors with those from the MCMC method.



Author: O. L. Creevey, M. Bazot

Source: https://arxiv.org/







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