论文标题
通过短距离传输机构形成冷古典库珀带
The Formation of the Cold Classical Kuiper Belt by a Short Range Transport Mechanism
论文作者
论文摘要
经典的kuiper带被一组具有低倾斜轨道，红色颜色且通常属于二进制系统的物体填充。这种所谓的冷古典Kuiper带被认为是由原始的冰卵石原位形成的，这些卵石凝结成数百公里的直径数百公里。根据这种情况，将通过流媒体不稳定性机制发生卵石变成大行星，这些机制在原始的太阳系磁盘中有效。然而，其他具有与冷古典Kuiper带相同颜色特性的物体也可以遇到与海王星一样均匀或分离的物体的2：1平均运动共振。在这里，我提出了一种机制，可以考虑冷古典的Kuiper带对象和经典kuiper带外的其他红色物体。根据提议的方案，红色物体原始位于行星磁盘的外部，但是，该磁盘的外部被截断了42 au以下的位置。通过这种方式，冷古典的kuiper带及其散落 /分离的对应物分别以短范围或略微散射到当前位置向外运输。同一过程也形成了共振对象。该机制旨在解释所有物体的分布，这些物体具有与来自原始行星磁盘外部边界中共同起源相同的颜色特征的分布。根据这里的情况，在其目前的位置内，冷古典kuiper带的总质量为20至100倍。
The Classical Kuiper Belt is populated by a group of objects with low inclination orbits, reddish colors and usually belonging to a binary system. This so called Cold Classical Kuiper Belt is considered to have been formed in situ from primordial ice pebbles that coagulated into planetesimals hundreds of kilometers in diameter. According to this scenario, the accretion of pebbles into large planetesimals would have occurred through the streaming instability mechanism that would be effective in the primordial Solar System disk of gas and solids. Nevertheless other objects with the same color characteristics as those found in the Cold Classical Kuiper Belt can be encountered also past the 2:1 mean motion resonance with Neptune as scattered or detached objects. Here I propose a mechanism that can account for both the cold Classical Kuiper Belt objects and other reddish objects outside the Classical Kuiper Belt. According to the proposed scenario, reddish objects were primordially in the outer portion of the planetesimal disk which was however truncated somewhere below 42 au. In this manner the cold Classical Kuiper Belt and its scattered / detached counterpart were respectively transported outwards by a short range or slightly scattered to their present locations. Resonant objects were also formed by the same process. This mechanism is aimed at explaining the distribution of all objects that share the same color characteristics as coming from a common origin in the outer borders of the primordial planetesimal disk. According to the scenario here proposed the Cold Classical Kuiper Belt would have been formed around 4 au inside its present location with a total mass 20 to 100 times as large as its present value.
