Resolving Power of Asteroseismic Inversion of the Kepler Legacy Sample

Alexander G. Kosovichev, Irina N. Kitiashvili

Research output: Contribution to journalArticlepeer-review

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.

Original languageEnglish (US)
Pages (from-to)107-115
Number of pages9
JournalProceedings of the International Astronomical Union
DOIs
StateAccepted/In press - 2020

All Science Journal Classification (ASJC) codes

  • Medicine (miscellaneous)
  • Astronomy and Astrophysics
  • Nutrition and Dietetics
  • Public Health, Environmental and Occupational Health
  • Space and Planetary Science

Keywords

  • KIC 5773345)
  • methods: Data analysis
  • stars: Individual (KIC 10162436
  • stars: Interiors
  • stars: Late-type
  • stars: Oscillations

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