We present two independent methods for studying the global stellar parameter space (mass M, age, initial chemical composition X_0, Z_0) of HD 49933 with seismic data. Using a local minimization and an MCMC algorithm, we obtain consistent 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 ellipses can be defined using Singular Value Decomposition techniques, and this is validated by comparing the errors with those from the MCMC method.
@article{arxiv.1011.3037,
title = {Probing the parameter space of HD 49933: a comparison between global and local methods},
author = {O. L. Creevey and M. Bazot},
journal= {arXiv preprint arXiv:1011.3037},
year = {2015}
}