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Viscous decretion discs around rapidly rotating stars

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arxiv 1304.6471 v2 pith:CJBN35WF submitted 2013-04-24 astro-ph.SR

Viscous decretion discs around rapidly rotating stars

classification astro-ph.SR
keywords arounddecretionrapidlyrotatingstarviscousangulardiscs
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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 an enough 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 $R_{\rm disc}\gtsim~10R_*$ with $R_*$ being the equatorial radius of the star, depending on the amount of angular momentum supply.

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Cited by 1 Pith paper

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. 2D hydrodynamical simulations of Be star decretion disc formation through boundary layer effects

    astro-ph.SR 2026-07 conditional novelty 6.0

    Viscous boundary layer effects launch a decretion disc around a star spinning at 80% of breakup but not at 70%, in 2D hydro simulations.