Effect of Rotation on Wave Mixing in Intermediate-mass Stars

Abstract Internal gravity waves are likely to cause mixing in stellar interiors. Studies show that the mixing by these waves changes drastically across age and mass. Here, we study the effect of rotation on this wave mixing by considering a 7 M ⊙ model at zero-age main sequence and mid-main sequence...

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Bibliographic Details
Published inThe Astrophysical journal Vol. 970; no. 2; pp. 104 - 113
Main Authors Varghese, A., Ratnasingam, R. P., Vanon, R., Edelmann, P. V. F., Mathis, S., Rogers, T. M.
Format Journal Article
LanguageEnglish
Published Philadelphia The American Astronomical Society 01.08.2024
IOP Publishing
American Astronomical Society
Subjects
Astrophysics
Gravity waves
Hydrodynamics
Internal gravity waves
Internal waves
Physics
Rossby number
Stellar age
Stellar evolution
Stellar interiors
Stellar rotation
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Summary:Abstract Internal gravity waves are likely to cause mixing in stellar interiors. Studies show that the mixing by these waves changes drastically across age and mass. Here, we study the effect of rotation on this wave mixing by considering a 7 M ⊙ model at zero-age main sequence and mid-main sequence. We compare the mixing profiles at a range of rotation rates (1 × 10 −5 , 2 × 10 −5 , 3 × 10 −5 , 4 × 10 −5 , and 1 × 10 −4 rad s −1 ) and observe that the mixing decreases with decreasing Rossby number. This can be attributed to the effect of rotation on convection, which influences the amplitude with which the waves are excited near the convective–radiative interface.
Bibliography:Stars and Stellar Physics
AAS50547
National Aeronautics and Space Administration (NASA)
LA-UR-23-32363
89233218CNA000001; NNX17AB92G
USDOE National Nuclear Security Administration (NNSA)
ISSN:0004-637X
1538-4357
DOI:10.3847/1538-4357/ad54b5