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Evidence of structural discontinuities in the inner core of red-giant stars

Space Sciences

Evidence of structural discontinuities in the inner core of red-giant stars

M. Vrard, M. S. Cunha, et al.

This exciting research delves into the inner core structure of red-giant clump stars using asteroseismic data from the Kepler satellite. With evidence suggesting large core structural discontinuities in around 6.7% of the sample, it opens up new possibilities for understanding stellar evolution. Conducted by Mathieu Vrard and colleagues, this study sheds light on the intermittent nature of these phenomena.

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Playback language: English
Abstract
This research utilizes asteroseismic data from the Kepler satellite to investigate the inner core structure of red-giant clump stars. The study reveals evidence of large core structural discontinuities in approximately 6.7% of the sample, suggesting a radiative thermal stratification in the mixing region beyond the convective core boundary. These stars are otherwise similar to those without discontinuities, implying the discontinuity formation is an intermittent phenomenon.
Publisher
Nature Communications
Published On
Dec 16, 2022
Authors
Mathieu Vrard, Margarida S. Cunha, Diego Bossini, Pedro P. Avelino, Enrico Corsaro, Benoît Mosser
Tags
asteroseismic data
red-giant stars
core structure
discontinuities
stellar evolution
thermal stratification

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