论文标题
Ryugu观察到的挥发性损失并不是仅由冲击加热引起的
Ryugu's observed volatile loss did not arise from impact heating alone
论文作者
论文摘要
包括Hayabusa2和Osiris-Rex Missions探索的包括Ryugu和Bennu在内的碳质小行星可能是挥发物对内部太阳系的重要载体。然而，龙古经历了明显的挥发性损失，可能是由于高速影响加热。在这里，我们以与主要小行星带（3.7 km S-1和5.8 km S-1）和模拟目标材料相当的速度提出了影响实验。我们发现，由于影响而导致目标物质挥发物的损失不足以说明Ryugu观察到的挥发性耗竭。我们建议，主要小行星带中的相互碰撞不太可能完全负责Ryugu或其母体的挥发物的丧失。取而代之的是，我们建议其他过程，例如与机制的多样性及其形成的时间相关联，对于说明碳质小行星的挥发性含量是必不可少的。
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.
