旅行者1号在位观测星际等离子体
D A Gurnett1, W S Kurth, L F Burlaga
1University of Iowa, Iowa City, IA 52242, USA. donald-gurnett@uiowa.edu
概括
旅行者1号进入了星际空间,通过检测电子等离子体振荡来证明这一点. 这标志着我们探索日间暂停和超越的重要里程碑.
科学领域:
- 太空科学 太空科学
- 等离子体物理学的物理学
- 太空物理学 太空物理学
背景情况:
- 旅行者1号和2号航天器已经旅行了超过35年,冒险超越太阳的影响.
- 太阳极点标志着太阳等离子体和星际介质之间的界限,其特点是等离子体密度显著增加.
研究的目的:
- 为了确定旅行者1号是否已经穿过日间断层进入星际空间.
- 为了分析等离子体波数据,寻找穿越日间断层的证据.
主要方法:
- 利用旅行者1号的等离子波仪器来检测电子等离子波振荡.
- 分析检测到的振荡频率来计算局部电子密度.
主要成果:
- 2013年4月9日,旅行者1号的等离子波仪器检测到电子等离子振荡在约2.6千赫兹.
- 这个频率对应于电子密度约为0.08cm(-3),与星际介质值一致.
- 这些发现强烈地表明,旅行者1号已经穿越了日间断层.
结论:
- 旅行者1号的观测提供了令人信服的证据,证明了穿越日间断层进入星际介质.
- 这一成就代表了我们了解太阳系外界界的一个重要步骤.
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