加速对数势中恒星运动的可积性
On the integrability of stellar motion in an accelerated logarithmic potential
摘要：
一个加速对数势模型的平均运动的恒星在一个平坦的旋转曲线星系，维持风系统。对于星系风发射区以外的恒星，风对线动量的非对称移除被视为叠加在星系势上的扰动加速度。研究了加速对数势场中恒星运动的可积性。我们利用动力系统的截面曲面来探讨运动的可积性。我们提供的数值证据表明，在加速对数势的运动是不可积的。大规模的混沌扩散发生沿加速度方向的投影角动量的较低的值，并持续在截断半径内的银河系的外部的角动量的所有值，其中银河系加速度平衡风引起的加速度。
英文摘要：
An accelerated logarithmic potential models the mean motion of stars in a flat rotation curve galaxy that sustains a wind system. For stars outside the galactic wind launching region, the asymmetric removal of linear momentum by the wind is seen as a perturbing acceleration superimposed onto the galactic potential. We study the integrability of stellar motion in an accelerated logarithmic potential. We use surfaces of section of the dynamical system to probe the integrability of motion. We provide numerical evidence that motion in an accelerated logarithmic potential is non-integrable. Large scale chaotic diffusion occurs for lower values of the projected angular momentum along the direction of acceleration and persists at all values of the angular momentum in the outer part of the galaxy inside the truncation radius where the galactic acceleration balances the wind-induced acceleration.
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