Ryugu观察到的挥发损失并不仅仅来自撞击加热
Ryugu's observed volatile loss did not arise from impact heating alone
摘要：
Hayabusa 2和OSIRIS-REx飞行任务探测的包括Ryugu和Bennu在内的碳质小行星可能是内太阳系挥发物的重要载体。然而，Ryugu经历了重大的挥发性损失，可能是由于超高速撞击加热。在这里，我们介绍了撞击实验，其速度与在主小行星带中预期的速度相当（3.7公里/秒和5.8公里/秒），并使用模拟目标材料。我们发现，由于影响从目标材料的挥发物的损失是不足以占所观察到的挥发性耗尽的Ryugu。我们认为，在主小行星带的相互碰撞不太可能是唯一负责的挥发物从龙宫或其母体的损失。相反，我们认为，额外的过程，例如与其形成的机制和时间的多样性，是必要的，以占可变的挥发性含量的碳质小行星。
英文摘要：
Carbonaceous asteroids, including Ryugu and Bennu, which have been explored by the Hayabusa2 and OSIRIS-REx missions, were probably important carriers of volatiles to the inner Solar System. However, Ryugu has experienced significant volatile loss, possibly from hypervelocity impact heating. Here we present impact experiments at speeds comparable to those expected in the main asteroid belt (3.7 km s-1 and 5.8 km s-1) and with analogue target materials. We find that loss of volatiles from the target material due to impacts is not sufficient to account for the observed volatile depletion of Ryugu. We propose that mutual collisions in the main asteroid belt are unlikely to be solely responsible for the loss of volatiles from Ryugu or its parent body. Instead, we suggest that additional processes, for example associated with the diversity in mechanisms and timing of their formation, are necessary to account for the variable volatile contents of carbonaceous asteroids.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
