论文标题
从撞击火山口上的射流分布：Ryugu：蓝色单元的可能起源
Ejecta distribution from impact craters on Ryugu: possible origin of the bluer units
论文作者
论文摘要
小行星（162173）Ryugu是第一个被探针近距离接近的旋转的小行星，即Hayabusa2航天器，它将Ryugu的大量高分辨率图像发送给了地球，并揭示了这种类型的小行星的性质。 Ryugu的显着特征之一是赤道山脊，这被认为是过去快速旋转的结果。尽管山脊的高龄，但山脊的存在表明，山脊表现出蓝色，表明它被新鲜的材料覆盖。除Ryugu外，许多其他小行星具有相似的蓝色区域，这被认为是喷射emplacement的结果。我们研究了Ryugu上实际陨石坑的喷射毯的分布，以评估弹出物的扩展为Ryugu Bluer单位的可能起源。我们确定当Ryugu的旋转快速时，从沿赤道积累的较低纬度形成的陨石坑中喷出，这可以解释赤道脊的蓝色。另一方面，尽管我们试图找到相应的弹出毯，但弹出式置换并不能完全解释Tokoyo Fossa的蓝色。
Asteroid (162173) Ryugu was the first spinning-top-shaped asteroid to be closely approached by a probe, the Hayabusa2 spacecraft, which sent numerous high-resolution images of Ryugu to the Earth and revealed the nature of this type of asteroid. One of the notable features of Ryugu is the equatorial ridge, which is considered the result of rapid spin in the past. Despite the advanced age of the ridge, indicated by the presence of numerous craters, the ridge exhibits a bluish color, indicating that it is covered with fresh material. In addition to Ryugu, many other asteroids have similar blue areas, which are considered the result of ejecta emplacement. We examined the distribution of ejecta blankets from actual craters on Ryugu to assess ejecta emplacement as a possible origin of Ryugu's bluer units. We determined that when Ryugu's rotation was fast, ejecta from craters formed at lower latitudes accumulated along the equator, which may explain the bluish color of the equatorial ridge. On the other hand, ejecta emplacement does not fully explain the bluish color of Tokoyo Fossa, although we attempted to find the corresponding ejecta blankets.
