English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

The theoretical oscillation frequencies of even the best asteroseismic modelsof solar-like oscillators show significant differences from observedoscillation frequencies. Structure inversions seek to use these frequencydifferences to infer the underlying differences in stellar structure. Whileused extensively to study the Sun, structure inversion results for other starshave so far been limited. Applying sound-speed inversions to more stars allowsus to probe stellar theory over a larger range of conditions, as well as lookfor overall patterns that may hint at deficits in our current understanding. Tothat end, we present structure inversion results for 12 main-sequencesolar-type stars with masses between 1M$_\odot$ and 1.15M$_\odot$. Ourinversions are able to infer differences in the isothermal sound speed in theinnermost 30% by radius of our target stars. In half of our target stars, thestructure of our best-fit model fully agrees with the observations. In theremainder, the inversions reveal significant differences between thesound-speed profile of the star and that of the model. We find five stars wherethe sound speed in the core of our stellar models is too low and one starshowing the opposite behavior. For the two stars which our inversions revealthe most significant differences, we examine whether changing the microphysicsof our models improves them and find that changes to nuclear reaction rates orcore opacities can reduce, but do not fully resolve, the differences.

Asteroseismic Inversions for Internal Sound Speed Profiles of Main-sequence Stars with Radiative Cores