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@article{43587, author = {Abramowicz, Marek and Horák, Jiří}, article_location = {JP - Japonsko}, article_number = {4}, doi = {http://dx.doi.org/10.1093/pasj/64.4.76}, keywords = {Accretion disks; X-rays: binaries}, language = {eng}, issn = {0004-6264}, journal = {Publications Of The Astronomical Society Of Japan}, title = {Alpha-Viscosity Effects in Slender Tori}, url = {http://pasj.asj.or.jp/v64/n4/640076/640076.pdf}, volume = {64}, year = {2012} }
TY - JOUR ID - 43587 AU - Abramowicz, Marek - Horák, Jiří PY - 2012 TI - Alpha-Viscosity Effects in Slender Tori JF - Publications Of The Astronomical Society Of Japan VL - 64 IS - 4 SN - 00046264 KW - Accretion disks KW - X-rays: binaries UR - http://pasj.asj.or.jp/v64/n4/640076/640076.pdf N2 - 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 longerthan 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-steepangular-momentum profiles, or very close to the central gravitating object. ER -
ABRAMOWICZ, Marek a Jiří HORÁK. Alpha-Viscosity Effects in Slender Tori. \textit{Publications Of The Astronomical Society Of Japan}. JP - Japonsko, 2012, roč.~64, č.~4, 9 s. ISSN~0004-6264. Dostupné z: https://dx.doi.org/10.1093/pasj/64.4.76.
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