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The size distribution of trans-Neptunian bodies

机译：海王星体的大小分布

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摘要

The magnitude distribution of the trans-Neptunian bodies composed of the Kuiper Belt Objects (KBOs) and Scattered Disk Objects (SDOs) is determined for absolute magnitudes H ≤ 7, using maximum likelihood estimation methods. This is translated into a corresponding size distribution. This gave a differential size index of q = 3.966 ± 0.15 for KBOs and q = 3.016 ± 0.32 for SDOs. It was found that these two distributions were statistically different. The KBOs were further split into classical KBOs and Plutinos which had indices of q = 4.074 ± 0.18 and q = 3.301 ± 0.37, respectively. There was no statistical evidence that these are different populations. The classical KBOs were further split and examined for four different semi-major axis ranges and it was found that there was moderate evidence that the entire sample was not well represented by one index. The distribution indices of the SDOs were compared with the distributions of short period comets and found to be similar. It is likely that the scattered disk population is the source of the short period comets.
机译：使用最大似然估计方法确定绝对值H≤7时，确定由柯伊伯带天体（KBO）和散盘对象（SDO）组成的海王星体的震级分布。这被转换为相应的大小分布。对于KBO，这给出的差分大小索引为q = 3.966±0.15，对于SDO，其差分值为q = 3.016±0.32。发现这两个分布在统计上是不同的。这些KBO进一步分为经典KBO和Plutinos，它们的索引分别为q = 4.074±0.18和q = 3.301±0.37。没有统计证据表明这些人口不同。将经典KBO进一步拆分并检查四个不同的半长轴范围，发现有中等证据表明整个样本不能很好地由一个指标表示。将SDO的分布指数与短周期彗星的分布进行比较，发现相似。散布的磁盘数量很可能是短期彗星的来源。

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