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Lookup NU author(s): Professor Tamara Rogers, Dr Dominic BowmanORCiD
This is the authors' accepted manuscript of an article that has been published in its final definitive form by Nature Research, 2021.
For re-use rights please refer to the publisher's terms and conditions.
© 2021, The Author(s), under exclusive licence to Springer Nature Limited.During most of their life, stars fuse hydrogen into helium in their cores. The mixing of chemical elements in the radiative envelope of stars with a convective core is able to replenish the core with extra fuel. If effective, such deep mixing allows stars to live longer and change their evolutionary path. Yet localized observations to constrain internal mixing are absent so far. Gravity modes probe the deep stellar interior near the convective core and allow us to calibrate internal mixing processes. Here we provide core-to-surface mixing profiles inferred from observed dipole gravity modes in 26 rotating stars with masses between 3 and 10 solar masses. We find a wide range of internal mixing levels across the sample. Stellar models with stratified mixing profiles in the envelope reveal the best asteroseismic performance. Our results provide observational guidance for three-dimensional hydrodynamical simulations of transport processes in the deep interiors of stars.
Author(s): Pedersen MG, Aerts C, Papics PI, Michielsen M, Gebruers S, Rogers TM, Molenberghs G, Burssens S, Garcia S, Bowman DM
Publication type: Article
Publication status: Published
Journal: Nature Astronomy
Year: 2021
Volume: 5
Pages: 715-722
Print publication date: 01/07/2021
Online publication date: 10/05/2021
Acceptance date: 19/03/2021
Date deposited: 12/11/2024
ISSN (electronic): 2397-3366
Publisher: Nature Research
URL: https://doi.org/10.1038/s41550-021-01351-x
DOI: 10.1038/s41550-021-01351-x
Data Access Statement: Data availability: The data that support the plots within this paper and other findings of this study are available from the corresponding author upon reasonable request. Code availability: The iterative prewhitening code is freely available and documented at https://github.com/IvS-KULeuven/IvSPythonRepository. The stellar evolution code, MESA, is freely available and documented at http://mesa.sourceforge.net/. The stellar pulsation code, GYRE, is freely available and documented at https://bitbucket.org/rhdtownsend/gyre/wiki/Home.
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