翘曲吸积盘的稳态解
Steady state solution of warped accretion discs
摘要：
我们认为薄吸积盘翘曲由于Bardeen-Petterson效应，提出了解析和数值解的情况下，两个粘度系数随半径的幂律变化，与两个幂律指数不一定相等。将解析解与数值解进行了比较，结果表明，新的解析解比以前的解析解更精确，但前者高估了外盘倾角的变化。我们的新的解析解是适当的中度翘曲光盘，而极端错位光盘，只有数值解是适当的。
英文摘要：
We consider a thin accretion disc warped due to the Bardeen-Petterson effect, presenting both analytical and numerical solutions for the situation that the two viscosity coefficients vary with radius as power law, with the two power law indices not necessarily equal. The analytical solutions are compared with numerical ones, showing that our new analytical solution is more accurate than previous one, which overestimates the inclination changing in the outer disc. Our new analytical solution is appropriate for moderately warped discs, while for extremely misaligned disc, only numerical solution is appropriate.
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