Asteroseismology of Solar-type stars with Kepler II: Stellar Modeling

TL;DR

This paper presents initial asteroseismic modeling of the G-type star KIC 11026764 observed by Kepler, combining oscillation data with spectroscopy to estimate stellar properties and understand its evolutionary state.

Contribution

It introduces a detailed modeling approach that integrates multiple independent codes to match asteroseismic and spectroscopic data for a star observed by Kepler.

Findings

Initial stellar property estimates derived from oscillation frequencies.

Evidence of significant evolutionary development in KIC 11026764.

Preliminary modeling results aligning asteroseismic and spectroscopic constraints.

Abstract

Observations from the Kepler satellite were recently published for three bright G-type stars, which were monitored during the first 33.5d of science operations. One of these stars, KIC 11026764, exhibits a characteristic pattern of oscillation frequencies suggesting that the star has evolved significantly. We have derived initial estimates of the properties of KIC 11026764 from the oscillation frequencies observed by Kepler, combined with ground-based spectroscopic data. We present preliminary results from detailed modeling of this star, employing a variety of independent codes and analyses that attempt to match the asteroseismic and spectroscopic constraints simultaneously.