...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >Jupiter's Auroral Radio Emissions Observed by Cassini: Rotational Versus Solar Wind Control, and Components Identification
【24h】

Jupiter's Auroral Radio Emissions Observed by Cassini: Rotational Versus Solar Wind Control, and Components Identification

机译：观测到木星的极光无线电排放卡西尼号:旋转与太阳风控制,和组件识别

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

Reanalyzing Cassini radio observations performed during Jupiter's flyby of 2000-2001, we study the internal (rotational) versus external (solar wind) control of Jupiter's radio emissions, from kilometer to decameter wavelengths, and the relations between the different auroral radio components. For that purpose, we build a database of the occurrence of Jovian auroral radio components bKOM, HOM, and DAM observed by Cassini, and then frequency-longitude stacked plots of the polarized intensity of these radio components. Comparing the results obtained inbound and outbound, as a function of the Observer's or Sun's longitude, we find that HOM & DAM are dominantly rotation-modulated (i.e., emitted from searchlight-like sources fixed in Jovian longitude), whereas bKOM is modulated more strongly by the solar wind than by the rotation (i.e., emitted from sources more active within a given Local Time sector). We propose a simple analytical description of these internal and external modulations and evaluate its main parameters (the amplitude of each control) for HOM + DAM and bKOM. Comparing Cassini and Nan?ay Decameter Array data, we find that HOM is primarily connected to the decameter emissions originating from the dusk sector of the Jovian magnetosphere. HOM and DAM components form a complex but stable pattern in the frequency-longitude plane. HOM also seems to be related to the "lesser arcs" identified by Voyager. bKOM consists of a main part aEbove ~40 kHz in antiphase with HOM occurrence, and detached patches bEelow ~80 kHz in phase with HOM. The frequency-longitude patterns formed by DAM, HOM and bKOM remain to be modeled.
机译：由于卡西尼号无线电观测木星的飞越2000 - 2001年期间,我们研究内部(旋转)和外部(太阳能木星的风)控制无线电排放,公里,十米波长,不同的极光电台之间的关系组件。木星的极光发生的收音机组件bKOM, HOM和大坝观测到卡西尼号,然后frequency-longitude堆叠块这些无线的极化强度组件。入站和出站的函数观察者或太阳的经度,我们发现HOM &大坝是rotation-modulated居多(例如,固定在发出searchlight-like来源威风凛凛的经度),而bKOM调制更多强烈的太阳风的旋转(例如,发出更加活跃在一个来源鉴于当地时间部门)。这些内部的分析描述外部调节并评估其主要每个控件的参数(振幅)HOM +坝和bKOM。十米数组数据,我们发现轨主要是连接到十米的排放来自木星的黄昏部门磁气圈。复杂但稳定的模式frequency-longitude平面。有关“小弧”了“航行者”号。kHz在反相轨的发生分离补丁bEelow ~ 80 kHz的阶段力宏。大坝,HOM和bKOM仍然被建模。

著录项

相似文献

  • 外文文献
  • 中文文献
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