Resolving Power of Asteroseismic Inversion of the Kepler Legacy Sample

Document Type

Conference Proceeding

Publication Date

1-1-2020

Abstract

The Kepler Asteroseismic Legacy Project provided frequencies, separation ratios, error estimates, and covariance matrices for 66 Kepler main sequence targets. Most of the previous analysis of these data was focused on fitting standard stellar models. We present results of direct asteroseismic inversions using the method of optimally localized averages (OLA), which effectively eliminates the surface effects and attempts to resolve the stellar core structure. The inversions are presented for various structure properties, including the density stratification and sound speed. The results show that the mixed modes observed in post-main sequence F-type stars allow us to resolve the stellar core structure and reveal significant deviations from the evolutionary models obtained by the grid-fitting procedure to match the observed oscillation frequencies.

Identifier

85092727401 (Scopus)

Publication Title

Proceedings of the International Astronomical Union

External Full Text Location

https://doi.org/10.1017/S1743921320001416

e-ISSN

17439221

ISSN

17439213

First Page

107

Last Page

115

Issue

354

Volume

15

Grant

NNX14AB7CG

Fund Ref

National Aeronautics and Space Administration

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