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King, A. R.; Pringle, J. E.; Livio, M.
Monthly notices of the Royal Astronomical Society, 04/2007, Letnik: 376, Številka: 4Journal Article
We 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∼ 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.
