...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of geophysical research >Plasma flow in the Jovian magnetosphere and related magnetic effects: Ulysses observations
【24h】

Plasma flow in the Jovian magnetosphere and related magnetic effects: Ulysses observations

机译：Plasma flow in the Jovian magnetosphere and related magnetic effects: Ulysses observations

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相关主题

摘要

The plasma flow in Jupiter's magnetosphere observed during the Ulysses flyby is compared with previous Pioneer, Voyager and ground-based observations. These data show that near-rigid corotation is enforced in the inner magnetosphere, but that the azimuthal flow plateaus at 150-300 km s(-1) in the middle magnetosphere plasma sheet beyond similar to 20 R(J). Such flows extend through the prenoon plasma sheet to similar to 45 R(J) in the compressed magnetosphere observed by the Voyagers and to similar to 70 R(J) in the expanded system observed by Ulysses. Higher speeds of similar to 500 km s(-1) occur in the postmidnight plasma sheet at 75-125 R(J) in Voyager data, while preliminary Ulysses evidence is presented for anticorotation in the dusk plasma sheet beyond similar to 50 R(J). In the outer magnetosphere the dawn and dusk flank flows are antisunward at several hundred kilometres per second, while in the prenoon sector the flow appears to depend magnetospheric state, being corotational at 250-600 km s(-1) when compressed and anticorotational (and radially in) at similar to 250 km s(-1) when expanded. These observations are compared with theories proposed by Hill and Vasyliunas, augmented to include the effects of solar wind coupling. This model accounts qualitatively for many features, but not for the anticorotation flows observed, We also compare the flows with the bending of the magnetic field out of meridian planes. Given the subcorotation-anticorotation nature of the observed flow, a pervasive ''lagging'' configuration is expected. This accords with in situ field data, except for the dusk outer magnetosphere observed by Ulysses, where a ''leading'' configuration was observed in the presence of subcorotating (downtail) flow. We conclude that field bending due to the tail-magnetopause current system dominates that due to ionospheric coupling on the dusk flank.

著录项

获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号