The Interaction of the Atmosphere of Enceladus with Saturn's Plasma
The Interaction of the Atmosphere of Enceladus with Saturn's Plasma
复制标题
土卫二大气层与土星等离子体的相互作用
作者：
Robert L. Tokar;R. E. Johnson;T. Hill;D. Pontius;W. Kurth;F. Crary;D. Young;M. Thomsen;D. Reisenfeld;A. Coates;G. Lewis;E. Sittler;D. Gurnett
在2005年7月14日卡西尼号与土卫二的相遇中，卡西尼号等离子体光谱仪测量到了共转离子流的强烈偏转，从土卫二开始至少27个土卫二半径（27 × 252.1公里）。卡西尼无线电和等离子体波科学仪器推断土卫二附近的等离子体密度几乎没有增加。这些数据与通过电荷交换和土星磁场拾取的离子形成一致。电荷交换发生在土卫二大气中的中性粒子和土星内磁层中的共转离子之间。在土卫二附近观测到拾取离子，并推断总质量加载速率约为每秒100千克（每秒3 × 1027个H2O分子）。
During the 14 July 2005 encounter of Cassini with Enceladus, the Cassini Plasma Spectrometer measured strong deflections in the corotating ion flow, commencing at least 27 Enceladus radii (27 × 252.1 kilometers) from Enceladus. The Cassini Radio and Plasma Wave Science instrument inferred little plasma density increase near Enceladus. These data are consistent with ion formation via charge exchange and pickup by Saturn's magnetic field. The charge exchange occurs between neutrals in the Enceladus atmosphere and corotating ions in Saturn's inner magnetosphere. Pickup ions are observed near Enceladus, and a total mass loading rate of about 100 kilograms per second (3 × 1027 H2O molecules per second) is inferred.