Viscous decretion discs around rapidly rotating stars

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11 Citations (Scopus)

Abstract

We discuss steady viscous Keplerian decretion discs around rapidly rotating stars. We assume that low-frequency modes, which may be excited by the opacity bump mechanism, convective motion in the core, or tidal force if the star is in a binary system, can transport a sufficient amount of angular momentum to the region close to the stellar surface. Under this assumption, we construct a star-disc system, in which there forms a viscous decretion disc around a rapidly rotating star because of the angular-momentum supply. We find a series of solutions of steady viscous decretion discs around a rapidly rotating star that extend to Rdisc ≳ 10R*, with R* being the equatorial radius of the star, depending on the amount of angular momentum supply.

Original languageEnglish
Article number122
JournalPublications of the Astronomical Society of Japan
Volume65
Issue number6
DOIs
Publication statusPublished - 2013 Dec 5

Keywords

  • Outflows
  • Stars: oscillation
  • Stars: rotation
  • Stars: winds

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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