行星前生长中的成分和大小相关的分类：为类汞行星的形成播下种子
Composition and Size Dependent Sorting in Preplanetary Growth: Seeding the Formation of Mercury-like Planets
摘要：
在早期的工作中，我们发现尘埃聚集体中大量的金属铁成分和强磁场促进了行星前的生长。这为在原行星盘内部形成类水星行星提供了一个初始偏差。我们通过在富铁聚集体中加入纯石英聚集体来扩展这些实验。磁性增强仍然导致形成更大的聚集体簇。这些团簇现在包括硅酸盐聚集体，它也可以连接链之间的桥梁。然而，至少需要一定比例的富铁聚集体来触发磁增强。在没有磁场的情况下，聚集体及其组分的粘附性质决定了给定尺寸的团簇的组成。这通过在弹跳势垒处的团簇形成引入了新的分馏和分选机制。
英文摘要：
In an earlier work, we found that large metallic iron fractions in dust aggregates and strong magnetic fields boost preplanetary growth. This sets an initial bias for the formation of Mercury-like planets in the inner part of protoplanetary disks. We extended these experiments here by adding pure quartz aggregates to the iron-rich aggregates. Magnetic boost still leads to the formation of larger clusters of aggregates. These clusters now include silicate aggregates, which can also be connecting bridges between chains. However, at least a certain fraction of iron-rich aggregates are needed to trigger magnetic boost. Without a magnetic field, the sticking properties of the aggregates and their constituents determine the composition of clusters of a given size. This introduces a new fractionation and sorting mechanism by cluster formation at the bouncing barrier.
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