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Ab Initio Modelling of Steady Rotating Stars

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Studying Stellar Rotation and Convection

Part of the book series: Lecture Notes in Physics ((LNP,volume 865))

Abstract

Modelling isolated rotating stars at any rotation rate is a challenge for the next generation of stellar models. These models will couple dynamical aspects of rotating stars, like angular momentum and chemicals transport, with classical chemical evolution, gravitational contraction or mass-loss. Such modelling needs to be achieved in two dimensions, combining the calculation of the structure of the star, its mean flows and the time-evolution of the whole. We present here a first step in this challenging programme. It leads to the first self-consistent two-dimensional models of rotating stars in a steady state generated by the ESTER code. In these models the structure (pressure, density and temperature) and the flow fields are computed in a self-consistent way allowing the prediction of the differential rotation and the associated meridian circulation of the stars. After a presentation of the physical properties of such models and the numerical methods at work, we give the first grid of such models describing massive and intermediate-mass stars for a selection of rotation rates up to 90 % of the breakup angular velocity.

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Acknowledgements

The authors acknowledge the support of the French Agence Nationale de la Recherche (ANR) under grant ESTER (ANR-09-BLAN-0140). This work was also supported by the Centre National de la Recherche Scientifique (CNRS, UMR 5277), through the Programme National de Physique Stellaire (PNPS). The numerical calculations were carried out on the CalMip machine of the “Centre Interuniversitaire de Calcul de Toulouse” (CICT), which is gratefully acknowledged.

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Authors and Affiliations

  1. UPS-OMP, IRAP, Université de Toulouse, Toulouse, France

    Michel Rieutord & Francisco Espinosa Lara

  2. IRAP, CNRS, 14 avenue E. Belin, 31400, Toulouse, France

    Michel Rieutord & Francisco Espinosa Lara

Authors
  1. Michel Rieutord
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  2. Francisco Espinosa Lara
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Correspondence to Michel Rieutord .

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Editors and Affiliations

  1. LESIA, Observatoire de Paris-Meudon, place Jules Janssen, batiment 14 5, Meudon Cedex, 92195, France

    Mariejo Goupil

  2. LESIA, Observatoire de Paris-Meudon, place Jules Janssen 5, Meudon Cedex, 92195, France

    Kévin Belkacem

  3. LESIA, Observatoire de Paris-Meudon, place Jules Janssen, batiment 14 5, Meudon Cedex, 92195, France

    Coralie Neiner

  4. Institut de Recherche en Astrophysique, et Planétologie, Observatoire Midi-Pyrénées, avenue Édouard Belin 14, Toulouse, 31400, France

    Francois Lignières

  5. Observatoire de Paris-Meudon, LESIA, Place Jules Janssen 5, Meudon, 92190, France

    John J. Green

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Rieutord, M., Espinosa Lara, F. (2013). Ab Initio Modelling of Steady Rotating Stars. In: Goupil, M., Belkacem, K., Neiner, C., Lignières, F., Green, J. (eds) Studying Stellar Rotation and Convection. Lecture Notes in Physics, vol 865. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-33380-4_3

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