[en] We study the effect of using different observed quantities (oscillation frequencies, binarity, interferometric radius) and the impact of their accuracy on constraining the uncertainities of global free stellar parameters (i.e. the mass, the age etc.). We use the Singular Value Decomposition (SVD) formalism to analyse the behavior of the chi^2 fitting function around its minimum. This method relates the errors in observed quantities to the precision in the model parameters. We apply this tool to the alpha Cen A for which, seismic, binarity and interferometric properties are known with high accuracy. We determine how changes of the accuracy of the observable constraints affect the precision obtained on the global stellar parameters.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Ozel, N.
Dupret, Marc-Antoine ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique stellaire théorique
Baglin, A.
Language :
English
Title :
Relative weights of the observational constraints on the determination of stellar parameters
Publication date :
01 July 2009
Journal title :
Communications in Asteroseismology
ISSN :
1021-2043
eISSN :
2224-8374
Publisher :
Verlag der Österreichischen Akademie der Wissenschaften, Wien, Austria