Bayesian asteroseismology of 23 solar-like Kepler targets

Autor(en)

M. Gruberbauer, D. B. Guenther, K. MacLeod, T. Kallinger

Abstrakt

We study 23 previously published Kepler targets to perform a consistent

grid-based Bayesian asteroseismic analysis and compare our results to

those obtained via the Asteroseismic Modelling Portal. We find

differences in the derived stellar parameters of many targets and their

uncertainties. While some of these differences can be attributed to

systematic effects between stellar evolutionary models, we show that the

different methodologies deliver incompatible uncertainties for some

parameters. Using non-adiabatic models and our capability to measure

surface effects, we also investigate the dependency of these surface

effects on the stellar parameters. Our results suggest a dependence of

the magnitude of the surface effect on the mixing length parameter which

also, but only minimally, affects the determination of stellar

parameters. While some stars in our sample show no surface effect at

all, the most significant surface effects are found for stars that are

close to the Sun's position in the Hertzsprung-Russell diagram.

Organisation(en)

Institut für Astrophysik

Externe Organisation(en)

Saint Mary's University

Journal

Monthly Notices of the Royal Astronomical Society

Band

435

Seiten

242-254

Anzahl der Seiten

13

ISSN

0035-8711

DOI

https://doi.org/10.1093/mnras/stt1289

Publikationsdatum

10-2013

Peer-reviewed

Ja

ÖFOS 2012

103004 Astrophysik, 103003 Astronomie

Schlagwörter

Link zum Portal