Europa's differentiated internal structure: Inferences from four Galileo encounters
Europa's differentiated internal structure: Inferences from four Galileo encounters
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DOI：
10.1126/science.281.5385.2019
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发表时间：
1998-09-25
期刊：
影响因子：
56.9
通讯作者：
Sjogren, WL
中科院分区：
文献类型：
--
作者：
Anderson, JD;Schubert, G;Sjogren, WL
伽利略号航天器与木卫二四次相遇的无线电多普勒数据已被用于改进木卫二内部的模型。木卫二最有可能分化成一个金属核，周围是岩石地幔和水冰液体外壳，但数据不能排除在水冰液体外壳下致密硅酸盐和金属均匀混合的可能性。金属核心的大小是不确定的，因为它的成分未知，但它可能是欧罗巴半径的50%。木卫二的水冰液体外壳的厚度必须在大约80到170公里的范围内。
Radio Doppler data from four encounters of the Galileo spacecraft with the jovian moon Europa have been used to refine models of Europa's interior. Europa is most Likely differentiated into a metallic core surrounded by a rock mantle and a water ice-liquid outer shell, but the data cannot eliminate the possibility of a uniform mixture of dense silicate and metal beneath the water ice-liquid shell. The size of a metallic core is uncertain because of its unknown composition, but it could be as targe as about 50 percent of Europa's radius. The thickness of Europa's outer shell of water ice-liquid must lie in the range of about 80 to 170 kilometers.