Ceres: Astrobiological Target and Possible Ocean World
Ceres: Astrobiological Target and Possible Ocean World
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DOI：
10.1089/ast.2018.1999
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发表时间：
2020-01-03
期刊：
影响因子：
4.2
通讯作者：
Young, Edward
中科院分区：
文献类型：
--
作者：
Castillo-Rogez, Julie C.;Neyeu, Marc;Young, Edward
谷神星是太阳系内仅次于地球的最富水的天体，最近被认为具有天体生物学的重要性。黎明号任务获得的化学和物理测量使关键参数得以量化，这有助于限制内太阳系唯一矮行星的宜居性。谷神星的表面化学和内部结构证明，液态水、岩石和可能的有机化合物之间存在着漫长的化学反应历史。我们回顾了有关化学成分、温度以及液体和化学梯度长期存在的前景的线索。与巨型行星卫星的比较表明，无论是从化学进化的角度还是在推动谷神星内部进化的物理机制上，都有相似之处。
Ceres, the most water-rich body in the inner solar system after Earth, has recently been recognized to have astrobiological importance. Chemical and physical measurements obtained by the Dawn mission enabled the quantification of key parameters, which helped to constrain the habitability of the inner solar system's only dwarf planet. The surface chemistry and internal structure of Ceres testify to a protracted history of reactions between liquid water, rock, and likely organic compounds. We review the clues on chemical composition, temperature, and prospects for long-term occurrence of liquid and chemical gradients. Comparisons with giant planet satellites indicate similarities both from a chemical evolution standpoint and in the physical mechanisms driving Ceres' internal evolution.