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Astronomy Letters

, Volume 45, Issue 2, pp 81–91 | Cite as

Simulation of a Hydrodynamic Stellar Wind from a Rapidly Rotating Star

  • S. V. BogovalovEmail author
  • S. M. Romanikhin
  • I. V. Tronin
Article
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Abstract

The mechanism for the formation of disk-like flows from rapidly rotating Be stars is not yet clear. An axisymmetric hydrodynamic stellar wind flow from a rapidly rotating star has been simulated numerically as a step in solving this problem. The change in the shape of the star as it rotates and the turbulence excited in the stellar wind at Reynolds numbers ∼109−1013 are taken into account. Calculations show the formation of a disk-like flow from the stellar surface at the equator, which expands into the polar regions due to a pressure gradient on scales of the order of the stellar radius. A poloidal velocity vortex is formed at high latitudes. No turbulence is excited near the equator within the simplest standard models and, therefore, no quasi-Keplerian disk-like flow emerges in the equatorial plane. A dependence of the total mass flux on the stellar rotation rate at various surface temperatures has been obtained.

Keywords

Be stars circumstellar disk stellar wind model rapidly rotating stars 

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Copyright information

© Pleiades Publishing, Inc. 2019

Authors and Affiliations

  • S. V. Bogovalov
    • 1
    Email author
  • S. M. Romanikhin
    • 1
  • I. V. Tronin
    • 1
  1. 1.MEPhI National Research Nuclear UniversityMoscowRussia

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