Authors: G. Dogan, T.S. Metcalfe, S. Deheuvels, M.P. Di Mauro, P. Eggenberger, M.J. Monteiro, I.M. Brandao, O. Creevey, and several other KASC Working Group-1 members
We performed asteroseismic modeling of two G-type subgiant stars using 8
months of Kepler data. The extraction of individual oscillation
frequencies was carried out by the Kepler Asteroseismic Science
Consortium (KASC) -- Working Group1, and the atmospheric constraints
([Fe/H], T_{eff} and log(g)) were determined through spectroscopic
observations at Nordic Optical Telescope, La Palma, Spain. From a
classical point of view, these two stars have very similar properties
(almost the same effective temperature and surface gravity), however,
thanks to asteroseismology we can determine their own global parameters
and compare their predicted internal structures.