Gravitational signature of rotationally distorted Jupiter caused by deep zonal winds
Gravitational signature of rotationally distorted Jupiter caused by deep zonal winds
复制标题
由深层纬向风引起的旋转扭曲木星的引力特征
DOI:
10.1016/j.icarus.2013.08.016
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发表时间:
2013-11
期刊:
影响因子:
3.2
通讯作者:
Schubert, Gerald
中科院分区:
文献类型:
--
作者:
Kong, Dali;Liao, Xinhao;Zhang, Keke;Schubert, Gerald
Both deep zonal winds, if they exist, and the basic rotational distortion of Jupiter contribute to its zonal gravity coefficientsJnforn⩾ 2. In order to capture the gravitational signature of Jupiter that is caused solely by its deep zonal winds, one must take into account the full effect of rotational distortion by computing the coefficientsJnin non-spherical geometry. This represents a difficult and challenging problem because the widely-used spherical-harmonic-expansion method becomes no longer suitable. Based on the model of a polytropic Jupiter with index unity, we compute Jupiter’s gravity coefficientsJ2,J4,J6, … ,J12taking into account the full effect of rotational distortion of the gaseous planet using a finite element method. For the model of deep zonal winds on cylinders parallel to the rotation axis, we also compute the variation of the gravity coefficients ΔJ2, ΔJ4, ΔJ6, … , ΔJ12caused solely by the effect of the winds in non-spherical geometry. It is found that the effect of the zonal winds on lower-order coefficients is weak, ∣ΔJn/Jn∣ < 1%, forn= 2, 4, 6, but it is substantial for the high-degree coefficients withn⩾ 8.
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DOI:
10.1088/0004-637x/768/1/43
发表时间:
2013-04
期刊:
The Astrophysical Journal
影响因子:
--
作者:
W. Hubbard
通讯作者:
W. Hubbard
影响因子:
64.8
作者:
Y. Kaspi;A. Showman;W. Hubbard;O. Aharonson;R. Helled
通讯作者:
Y. Kaspi;A. Showman;W. Hubbard;O. Aharonson;R. Helled
影响因子:
2.4
作者:
R. Helled;G. Schubert;J. Anderson
通讯作者:
R. Helled;G. Schubert;J. Anderson
影响因子:
3.2
作者:
Hubbard, WB
通讯作者:
Hubbard, WB
影响因子:
3.1
作者:
Liu, Junjun;Schneider, Tapio
通讯作者:
Schneider, Tapio