无碰撞系统中的熵产生。III。模拟结果
Entropy Production in Collisionless Systems. III. Results from Simulations
摘要：
由简单初始条件的自引力、无碰撞坍缩形成的平衡已经被研究了几十年。我们提出的结果，我们试图描述的平衡形成的$N$ -体模拟使用的激励模型。以前的工作表明，它是可能的，以定义分布函数的系统，描述最大熵状态。这些分布函数用于创建径向密度和速度分布，以便与模拟结果进行比较。各种各样的$N$体代码条件用于减少数值问题导致结果偏差的可能性。我们发现，一个子集的初始条件研究导致平衡，可以准确地描述这些模型，并直接计算的熵显示最大值正在实现。
英文摘要：
The equilibria formed by the self-gravitating, collisionless collapse of simple initial conditions have been investigated for decades. We present the results of our attempts to describe the equilibria formed in $N$-body simulations using thermodynamically-motivated models. Previous work has suggested that it is possible to define distribution functions for such systems that describe maximum entropy states. These distribution functions are used to create radial density and velocity distributions for comparison to those from simulations. A wide variety of $N$-body code conditions are used to reduce the chance that results are biased by numerical issues. We find that a subset of initial conditions studied lead to equilibria that can be accurately described by these models, and that direct calculation of the entropy shows maximum values being achieved.
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