Accretion disc viscosity: how big is alpha?

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dc.creatorKing, A. R.
dc.creatorPringle, J. E.
dc.creatorLivio, M.
dc.date2007-01-29
dc.date.accessioned2026-07-07T10:21:38Z
dc.date.available2026-07-07T10:21:38Z
dc.descriptionWe consider observational and theoretical estimates of the accretion disc viscosity parameter $α$. We find that in thin, fully-ionized discs, the best observational evidence suggests a typical range $α\sim 0.1 - 0.4$, whereas the relevant numerical simulations tend to derive estimates for $α$ which are an order of magnitude smaller. We discuss possible reasons for this apparent discrepancy.
dc.descriptionMNRAS, in press
dc.identifierhttps://arxiv.org/abs/astro-ph/0701803
dc.identifierhttp://arxiv.org/abs/astro-ph/0701803
dc.identifierMon.Not.Roy.Astron.Soc.376:1740-1746,2007
dc.identifierdoi:10.1111/j.1365-2966.2007.11556.x
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/175242
dc.subjectAstrophysics
dc.titleAccretion disc viscosity: how big is alpha?
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