标题： 由潮汐引起的原恒星盘的扭曲 显示英文标题

标题： Tidally-induced warps in protostellar discs

摘要： 我们回顾了关于偏心气盘动力学的结果。 我们考虑由一颗伴星对开普勒盘的潮汐扰动，该伴星轨道面相对于盘面倾斜。 这种扰动诱导盘进动，因此也诱导任何可能驱动的喷流进动。 在某些条件下，进动率是均匀的，结果盘进入扭曲模式。 潮汐转矩还导致盘的截断，倾角角度的演化（不一定使盘面和轨道面趋于一致），以及盘内的角动量传输。 我们注意到，这种扭曲盘的光谱能量分布不同于平坦盘的。 最后，我们列出原恒星盘中扭曲的观测效应。 显示英文摘要

摘要： We review results on the dynamics of warped gaseous discs. We consider tidal perturbation of a Keplerian disc by a companion star orbiting in a plane inclined to the disc. The perturbation induces the precession of the disc, and thus of any jet it could drive. In some conditions the precession rate is uniform, and as a result the disc settles into a warp mode. The tidal torque also leads to the truncation of the disc, to the evolution of the inclination angle (not necessarily towards alignment of the disc and orbital planes) and to a transport of angular momentum in the disc. We note that the spectral energy distribution of such a warped disc is different from that of a flat disc. We conclude by listing observational effects of warps in protostellar discs.