ASTEROSEISMOLOGY OF EVOLVED STARS WITH KEPLER : A NEW WAY TO CONSTRAIN STELLAR INTERIORS USING MODE INERTIAS

The asteroseismology of evolved solar-like stars is experiencing growing interest due to the wealth of observational data from space-borne instruments such as the CoRoT and Kepler spacecraft. In particular, the recent detection of mixed modes, which probe both the innermost and uppermost layers of s...

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Published inAstrophysical journal. Letters Vol. 781; no. 2; pp. L29 - 6
Main Authors Benomar, O., Belkacem, K., Bedding, T. R., Stello, D., Di Mauro, M. P., Ventura, R., Mosser, B., Goupil, M. J., Samadi, R., Garcia, R. A.
Format Journal Article
LanguageEnglish
Published United States Bristol : IOP Publishing 01.02.2014
Subjects
ACCURACY
ASTEROIDS
Astrophysics
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
DATA ANALYSIS
DETECTION
Diagnostic systems
Estimates
Inertia
LAYERS
LIMITING VALUES
MASS
MOMENT OF INERTIA
OSCILLATIONS
Phases
Physics
PROBES
Red giant stars
SEISMOLOGY
SPACE
Spacecraft
STAR EVOLUTION
STARS
STRESSES
TRAPPING
stars: interiors
methods: data analysis
Subject headings: stars: oscillations
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Summary:The asteroseismology of evolved solar-like stars is experiencing growing interest due to the wealth of observational data from space-borne instruments such as the CoRoT and Kepler spacecraft. In particular, the recent detection of mixed modes, which probe both the innermost and uppermost layers of stars, paves the way for inferring the internal structure of stars along their evolution through the subgiant and red giant phases. Mixed modes can also place stringent constraints on the physics of such stars and on their global properties (mass, age, etc.). Here, using two Kepler stars (KIC 4351319 and KIC 6442183), we demonstrate that measurements of mixed mode characteristics allow us to estimate the mode inertias, providing a new and additional diagnostics on the mode trapping and subsequently on the internal structure of evolved stars. We however stress that the accuracy may be sensitive to non-adiabatic effects.
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ISSN:2041-8205
2041-8213
DOI:10.1088/2041-8205/781/2/L29