Viscous decretion discs around rapidly rotating stars

Umin Lee

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)


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
Issue number6
Publication statusPublished - 2013 Dec 5


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

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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