Atmospheres and Plasma Interactions at Saturn’s Largest Inner Icy Satellites

Atmospheres and Plasma Interactions at Saturn’s Largest Inner Icy Satellites
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土星最大的内部冰卫星的大气和等离子体相互作用

DOI:
10.1086/428665
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发表时间:
2005
期刊:
The Astrophysical Journal Letters
影响因子:
--
通讯作者:
D. Strobel
D. Strobel
中科院分区:
--
文献类型:
--
作者:
J. Saur;D. Strobel

文献摘要

被引文献

相似文献

我们探索了土星的冰雪卫星土卫二、土卫二、土卫四、土卫四和土卫五上可能存在的大气。只有质量最大的卫星土卫五才有可能保持稀薄的氧气大气层/地外圈。其他卫星的质量太小,在存在较大热逃逸率的情况下无法保持引力大气。如果土卫五大气层的温度接近其表面温度,那么分子氧柱密度为6×1017m-2是可能的,并导致可识别的等离子体与土星磁层的相互作用,这可以通过卡西尼号航天器的近距离飞行来探测。
We explore the possible existence of atmospheres on Saturn's icy satellites, Mimas, Enceladus, Tethys, Dione, and Rhea. Only the most massive satellite, Rhea, has the potential to hold a thin oxygen atmosphere/exosphere. The masses of the other satellites are too small to retain gravitationally atmospheres in the presence of large thermal escape rates. If the temperature of Rhea's atmosphere is close to its surface temperature, then a molecular oxygen column density of 6 × 1017 m-2 is possible and causes a discernable plasma interaction with Saturn's magnetosphere that can be probed by close flybys of the Cassini spacecraft.