Probing the parameter space of HD 49933: a comparison between global and local methods

Abstract

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.

to be published in JPCS

References in corpus (5)

• ADIPLS -- the Aarhus adiabatic oscillation package
• Structure and Evolution of Nearby Stars with Planets II. Physical Properties of ~1000 Cool Stars from the SPOCS Catalog
• ASTEC -- the Aarhus STellar Evolution Code
• The complementary roles of interferometry and asteroseismology in determining the mass of solar-type stars
• On the detection of Lorentzian profiles in a power spectrum: A Bayesian approach using ignorance priors

Cited by in corpus (6)

• A large sample of calibration stars for Gaia: log g from Kepler and CoRoT
• Estimating stellar mean density through seismic inversions
• The diameter of the CoRoT target HD 49933. Combining the 3D limb darkening, asteroseismology, and interferometry
• Surface layer independent model fitting by phase matching: theory and application to HD49933 an HD177153 (aka Perky)
• Asteroseismic analysis of the CoRoT target HD49933
• The CoRoT target HD49933: a possible seismic signature of heavy elements ionization in the deep convective zone