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Faculté des Sciences
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MASTER THESIS
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Modelling the Shear Layer Oscillation and its impact on the rotation of low-mass stars

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Verwilghen, Pierrick ULiège
Promotor(s) : Pinçon, Charly ULiège ; Dupret, Marc-Antoine ULiège
Date of defense : 6-Sep-2021/7-Sep-2021 • Permalink : http://hdl.handle.net/2268.2/12746
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Title : Modelling the Shear Layer Oscillation and its impact on the rotation of low-mass stars
Translated title : [fr] Modélisation de la SLO et ses impacts sur la rotation des étoiles de faible masse
Author : Verwilghen, Pierrick ULiège
Date of defense  : 6-Sep-2021/7-Sep-2021
Advisor(s) : Pinçon, Charly ULiège
Dupret, Marc-Antoine ULiège
Committee's member(s) : Beckers, Jean-Marie ULiège
Rauw, Grégor ULiège
Salmon, Sébastien ULiège
Language : English
Number of pages : 77
Keywords : [en] Stellar physics
[en] Angular momentum transport
[en] Hydrodynamics
[en] Modelling
Discipline(s) : Physical, chemical, mathematical & earth Sciences > Space science, astronomy & astrophysics
Institution(s) : Université de Liège, Liège, Belgique
Degree: Master en sciences spatiales, à finalité approfondie
Faculty: Master thesis of the Faculté des Sciences

Abstract

[en] In this work, we study the interaction between the Internal Gravity Waves (IGW) and the mean rotation profile occurring in Sun-like stars just below the convective zone on a thin part of the radiative zone. This interaction takes the shape of an oscillation of the rotation profile over time, the so-called Shear Layer Oscillations (SLO). The understanding of the SLO, which occurs on time scales of the order of the year, is necessary to know whether IGW can explain the disagreement between the observed low core rotation frequency in main sequence and evolved low-mass stars and the current predictions of our theoretical models. Including the effects of the SLO in a stellar evolution code, which deals with time scales of the order of the billion years (lifetime of stars), is a real challenge (due to the huge difference between the time scales of the SLO and stars). This work aims to describe the SLO through simple prescriptions in order to include its effects in such a code.


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Author

  • Verwilghen, Pierrick ULiège Université de Liège > Master sc. spatiales, à fin.

Promotor(s)

Committee's member(s)

  • Beckers, Jean-Marie ULiège Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > GeoHydrodynamics and Environment Research (GHER)
    ORBi View his publications on ORBi
  • Rauw, Grégor ULiège Université de Liège - ULiège > Groupe d'astrophysique des hautes énergies (GAPHE)
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  • Salmon, Sébastien ULiège Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique stellaire théorique et astérosismologie
    ORBi View his publications on ORBi
  • Total number of views 90
  • Total number of downloads 151










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