Degree-one convection and the origin of Εnceladus' dichotomy
Degree-one convection and the origin of Εnceladus' dichotomy
复制标题
一级对流和恩塞拉多斯二分法的起源
DOI:
10.1016/j.icarus.2007.05.001
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发表时间:
2007
期刊:
影响因子:
3.2
通讯作者:
H. Hussmann
中科院分区:
文献类型:
--
作者:
F. Sohl;H. Hussmann
Recently, the Cassini spacecraft has detected ongoing geologic activity near the south pole of Saturn's moon Enceladus. In contrast, the satellite's north-polar region is heavily cratered and appears to have been geologically inactive for a long time. We propose that this hemispheric dichotomy is caused by interior dynamics with degree-one convection driving the south-polar activity. We investigate a number of core sizes and internal heating rates for which degree-one convection occurs. The numerical simulations imply that a core radius of less than 100±20 km and an energy input at a rate of 3.0 to 5.5 GW would be required for degree-one convection to prevail. This is within the range of the observed thermal power release near Enceladus' south pole. Provided that Enceladus is not fully differentiated, degree-one convection is found to be a viable mechanism to explain Enceladus' hemispheric dichotomy.
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DOI:
--
发表时间:
2006
期刊:
影响因子:
--
作者:
F. Sohl;H. Hussmann;R. Ziethe
通讯作者:
R. Ziethe
DOI:
--
发表时间:
2003
期刊:
影响因子:
--
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T. Spohn
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1983
期刊:
影响因子:
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DOI:
--
发表时间:
2006
期刊:
影响因子:
--
作者:
H. Hussman;F. Sohl;M. Grott
通讯作者:
M. Grott
DOI:
--
发表时间:
1992
期刊:
影响因子:
--
作者:
M. Rudman
通讯作者:
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