论文标题
土星的戒指是探测土星内部结构的地震仪
Saturn's rings as a seismograph to probe Saturn's internal structure
论文作者
论文摘要
正如它已经为地球，太阳和恒星所做的那样，地震学有可能从根本上改变研究巨型行星的内部方式。在一系列预见的事件中，卡西尼航天器对土星环的观察在巨型行星地震学上迅速破裂。重力直接将行星的正常模式振荡耦合到环颗粒的轨道上，从而产生频率编码土星的内部结构和旋转的螺旋波。这些模式揭示了土星中心附近一个稳定的分层区域，并对土星旋转提供了新的限制。
As it has already done for Earth, the sun, and the stars, seismology has the potential to radically change the way the interiors of giant planets are studied. In a sequence of events foreseen by only a few, observations of Saturn's rings by the Cassini spacecraft have rapidly broken ground on giant planet seismology. Gravity directly couples the planet's normal mode oscillations to the orbits of ring particles, generating spiral waves whose frequencies encode Saturn's internal structure and rotation. These modes have revealed a stably stratified region near Saturn's center, and provided a new constraint on Saturn's rotation.
