论文标题
冰巨头天王星和海王星的环地震学
Ring Seismology of the Ice Giants Uranus and Neptune
论文作者
论文摘要
我们评估使用环地震学来探测冰巨头天王星和海王星的内部的前景。我们通过使用恒星振荡代码GYRE计算不同内部模型和海王星的不同内部模型的正常模式光谱来做到这一点。这些光谱可以预测这些行星环系统中的位置可能检测到内部振荡的影响。我们发现,Azimuthal Order $ M = 2 $或$ 7 \ leq M \ leq M \ leq 19 $的F模式共振在天王星的内环(6、5、4,$α$和$β$)中落在,而F-mode共鸣的$ 2 \ leq m \ leq m \ leq M \ leq 12 $落在数量$ fius famuul fiuul coun fiuncule $ becem fime fime Quem Quem Quem Quem Quem Quem Quem Quem Quem Quem Quem Qual中。此外,$ M = 2 $或$ 6 \ leq M \ leq 13 $的F模式共振可能会给Neptune的脆弱Galle环提供方位角结构。我们还发现,G模式的共振可能落在这些行星的中间至外环上。尽管最有可能需要确认环中的任何波和行星正常模式之间的关联,但正常模式光谱的多样性暗示,在天王星或海王星环或海王星环中仅鉴定一种或两种模式,可以消除各种内部模型,从而有助于对Voyager观察和未来的SpaceCraft衡量的解释。
We assess the prospect of using ring seismology to probe the interiors of the ice giants Uranus and Neptune. We do this by calculating normal mode spectra for different interior models of Uranus and Neptune using the stellar oscillation code GYRE. These spectra provide predictions of where in these planets' ring systems the effects of interior oscillations might be detected. We find that f-mode resonances with azimuthal order $m=2$ or $7 \leq m \leq 19$ fall among the inner rings (6, 5, 4, $α$, and $β$) of Uranus, while f-mode resonances with $2 \leq m \leq 12$ fall in the tenuous $ζ$ ring region. In addition, f-mode resonances with $m=2$ or $6 \leq m \leq 13$ may give azimuthal structure to Neptune's tenuous Galle ring. We also find that g-mode resonances may fall in the middle to outer rings of these planets. Although an orbiter is most likely required to confirm the association between any waves in the rings and planetary normal modes, the diversity of normal mode spectra implies that identification of just one or two modes in the rings of Uranus or Neptune would eliminate a variety of interior models, and thus aid in the interpretation of Voyager observations and future spacecraft measurements.