论文标题
反弹的碰撞分裂和散装组成跟踪
Collisional fragmentation and bulk composition tracking in REBOUND
论文作者
论文摘要
我们提出一个碎片模块和一个$ n $ body代码反弹的构图跟踪代码。我们的分裂代码利用了以前的半分析模型，并遵循类似于$ n $ body代码汞的碎片的实现方法。在我们的$ n $体体模拟中，我们通过通过扩展因子$ f $膨胀粒子半径来减少碰撞和行星形成时间尺度，并尝试使用$ f $的各种值来了解扩展因子如何影响碰撞历史和最终行星系统。随着扩展因子的增加，在较大的轨道上产生具有更多行星和行星的行星系统的合并速率也会增加。此外，我们提出了一个构图跟踪代码，该代码遵循均相体的组成变化作为质量交换的函数，并将其用于研究碎裂和扩张因子的使用如何影响向内陆盘的挥发性递送。我们发现，碎片化可以增强相对于完美合并的径向混合，并且平均而言，随着$ f $的增加，行星的平均水量分数也会增加。随着碰撞的早期发生，径向混合会随着$ f $的增加而减少
We present a fragmentation module and a composition tracking code for the $n$-body code REBOUND. Our fragmentation code utilises previous semi-analytic models and follows an implementation method similar to fragmentation for the $n$-body code MERCURY. In our $n$-body simulations with fragmentation, we decrease the collision and planet formation timescales by inflating the particle radii by an expansion factor $f$ and experiment with various values of $f$ to understand how expansion factors affect the collision history and final planetary system. As the expansion factor increases, so do the rate of mergers which produces planetary systems with more planets and planets at larger orbits. Additionally, we present a composition tracking code which follows the compositional change of homogeneous bodies as a function of mass exchange and use it to study how fragmentation and the use of an expansion factor affects volatile delivery to the inner terrestrial disc. We find that fragmentation enhances radial mixing relative to perfect merging and that on average, as $f$ increases so does the average water mass fraction of the planets. Radial mixing decreases with increasing $f$ as collisions happen early on, before the bodies have time to grow to excited orbits and move away from their original location
