• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Nature >Evidence for a magrtetosphere at Ganymede from plasmawave observations by the Galileo spacecraft
【24h】

Evidence for a magrtetosphere at Ganymede from plasmawave observations by the Galileo spacecraft

机译：伽利略号航天器等离子体波观测证明木卫三发生了变质层的证据。

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

摘要

ON 27 June 1996 the Galileo spacecraft made the first of four planned close fly-bys of Ganymede, Jupiter's largest moon. Here we report measurements of plasma waves and radio emissions, over the frequency range 5 Hz to 5.6 MHz during the first encounter. Intense plasma waves were detected over a region of space nearly four times Ganymede's diameter, which is much larger than would be expected for a simple wake arising from Ganymede's passage through Jupiter's rapidly rotating magneto-sphere. The types of waves detected (whistler-mode emissions, upper hybrid waves, electrostatic electron cyclotron waves and escaping radio emission) strongly suggest that Ganymede has a large, extended magnetosphere of its own. The data indicate the presence of a strong (B > 400 nT) magnetic field, and show that Ganymede is surrounded by an ionosphere-like plasma with a maximum electron density of about 100 particles cm~(-3) and a scale height of about 1,000km.
机译：1996年6月27日，伽利略号航天器进行了木星最大月球Ganymede的四个计划近距离飞越中的第一个。在这里，我们报告第一次接触期间在5 Hz至5.6 MHz频率范围内的等离子波和无线电发射的测量结果。在几乎是木卫三直径四倍的空间区域中检测到了强烈的等离子体波，这比木卫三穿过木星快速旋转的磁层所产生的简单唤醒所预期的要大得多。检测到的波的类型（惠斯勒模式发射，上混合波，静电电子回旋波和逃逸的无线电发射）强烈表明木卫三具有自己的大而扩展的磁层。数据表明存在强（B> 400 nT）磁场，并表明木卫三被电离层状等离子体包围，最大电子密度约为100个粒子cm〜（-3），尺度高度约为1,000公里。

著录项

相似文献

  • 外文文献
  • 专利
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