"19240" . . "Alpha-Viscosity Effects in Slender Tori"@en . "http://pasj.asj.or.jp/v64/n4/640076/640076.pdf" . "0004-6264" . "[131180E950A7]" . "121739" . "Accretion disks; X-rays: binaries"@en . "Abramowicz, Marek" . "RIV/47813059:19240/12:#0004587" . "000309296600013" . . . "RIV/47813059:19240/12:#0004587!RIV13-MSM-19240___" . "JP - Japonsko" . "We explore effects of the Shakura-Sunyaev alpha-viscosity on the dynamics and oscillations of slender tori. We start with a slow secular evolution of the torus. We show that the angular-momentum profile approaches the Keplerian one on a timescale longer than a dynamical one by a factor on the order of 1/alpha. We then focus our attention on the oscillations of the torus. We discuss the effects of various angular-momentum distributions. Using a perturbation theory, we have found a rather general result that the high-order acoustic modes are damped by the viscosity, while the high-order inertial modes are enhanced. We calculate viscous growth rates for the lowest-order modes, and show that already the lowest-order inertial mode is unstable for less-steep angular-momentum profiles, or very close to the central gravitating object." . . "5"^^ . . . "We explore effects of the Shakura-Sunyaev alpha-viscosity on the dynamics and oscillations of slender tori. We start with a slow secular evolution of the torus. We show that the angular-momentum profile approaches the Keplerian one on a timescale longer than a dynamical one by a factor on the order of 1/alpha. We then focus our attention on the oscillations of the torus. We discuss the effects of various angular-momentum distributions. Using a perturbation theory, we have found a rather general result that the high-order acoustic modes are damped by the viscosity, while the high-order inertial modes are enhanced. We calculate viscous growth rates for the lowest-order modes, and show that already the lowest-order inertial mode is unstable for less-steep angular-momentum profiles, or very close to the central gravitating object."@en . . "Alpha-Viscosity Effects in Slender Tori" . . . . . "Alpha-Viscosity Effects in Slender Tori"@en . . . . "Horak, J." . "64" . "1"^^ . . . "4" . . "I, O, P(GAP209/11/2004)" . "9"^^ . "Alpha-Viscosity Effects in Slender Tori" . "Publications Of The Astronomical Society Of Japan" .