Magnetospheric Chorus, Exohiss, and Magnetosonic Emissions Simultaneously Modulated by Fundamental Toroidal Standing Alfvén Waves Following Solar Wind Dynamic Pressure Fluctuations

Liu Nigang; Su Zhenpeng; Gao Zhonglei; Zheng Huinan; Wang Yuming; Wang Shui

摘要

Abstract >Magnetospheric quasiperiodic whistler‐mode emissions have long been considered a consequence of the relaxation oscillation or the compressional ultralow‐frequency wave modulation. Here we experimentally demonstrate that the whistler‐mode chorus, exohiss, and magnetosonic emissions can be effectively modulated by the toroidal ultralow‐frequency waves. On 04 August 2017, the solar wind dynamic pressure fluctuations excited the fundamental toroidal standing Alfvén waves in the dayside magnetosphere. These regular toroidal pulsations displayed the approximately same periods as the power variations of the whistler‐mode emissions from 50?Hz to 5?kHz. Along with the decay of the toroidal pulsations, the quasiperiodic feature of these whistler‐mode emissions gradually became indistinct. However, no modulation signatures of background parameters and resonant particles for the whistler‐mode emissions were observable near the equator, and the exact cause for this phenomenon remains to be elucidated. </abstract> </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> <div class="translation abstracttxt"> <span class="zhankaihshouqi fivelineshidden" id="abstract"> <span>机译：</span><Abstract Type =“Main”XML：Lang =“en”XML：ID =“Grl58630-Abs-Abs-0001”> <标题类型=“main”>抽象</ title> >磁体Quasioiodic吹口哨模式排放被认为是弛豫振荡或压缩超频波调制的结果。在这里，我们通过实验证明，哨声模式合唱，exohiss，和磁声发射可以由环形超低频率波被有效地调制。于2017年8月4日，太阳风电压波动激发了在天磁层中的基本环形站立的Alfvén波。这些常规环形脉动显示大致相同的时间，因为吹口石模式发射的功率变化从50？Hz到5？kHz。随着环形脉动的衰减，这些吹口石模式排放的QuaSiodic特征逐渐变得模糊。然而，在赤道附近可以观察到吹口石模式排放的背景参数和谐振颗粒的调制签名，并且仍然阐明这种现象的确切原因。</ p> </摘要> </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> </div> <div class="record"> <h2 class="all_title" id="enpatent33" >著录项</h2> <ul> <li> <span class="lefttit">来源</span> <div style="width: 86%;vertical-align: text-top;display: inline-block;"> <a href='/journal-foreign-23539/'>《Geophysical Research Letters》</a> <b style="margin: 0 2px;">|</b><span>2019年第4期</span><b style="margin: 0 2px;">|</b><span>共11页</span> </div> </li> <li> <div class="author"> <span class="lefttit">作者</span> <p id="fAuthorthree" class="threelineshidden zhankaihshouqi"> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Liu Nigang&option=202" target="_blank" rel="nofollow">Liu Nigang;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Su Zhenpeng&option=202" target="_blank" rel="nofollow">Su Zhenpeng;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Gao Zhonglei&option=202" target="_blank" rel="nofollow">Gao Zhonglei;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Zheng Huinan&option=202" target="_blank" rel="nofollow">Zheng Huinan;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Wang Yuming&option=202" target="_blank" rel="nofollow">Wang Yuming;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Wang Shui&option=202" target="_blank" rel="nofollow">Wang Shui;</a> </p> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zkzz" style="display: none;">展开▼</span> </div> </li> <li> <div style="display: flex;"> <span class="lefttit">作者单位</span> <div style="position: relative;margin-left: 3px;max-width: 639px;"> <div class="threelineshidden zhankaihshouqi" id="fOrgthree"> <p>CAS Key Laboratory of Geospace Environment Department of Geophysics and Planetary SciencesUniversity of Science and Technology of ChinaHefei China;</p> <p>CAS Key Laboratory of Geospace Environment Department of Geophysics and Planetary SciencesUniversity of Science and Technology of ChinaHefei China;</p> <p>Institute of Space Science and Applied TechnologyHarbin Institute of TechnologyShenzhen China;</p> <p>CAS Key Laboratory of Geospace Environment Department of Geophysics and Planetary SciencesUniversity of Science and Technology of ChinaHefei China;</p> <p>CAS Key Laboratory of Geospace Environment Department of Geophysics and Planetary SciencesUniversity of Science and Technology of ChinaHefei China;</p> <p>CAS Key Laboratory of Geospace Environment Department of Geophysics and Planetary SciencesUniversity of Science and Technology of ChinaHefei China;</p> </div> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zhdw" style="display: none;">展开▼</span> </div> </div> </li> <li > <span class="lefttit">收录信息</span> <span style="width: 86%;vertical-align: text-top;display: inline-block;"></span> </li> <li> <span class="lefttit">原文格式</span> <span>PDF</span> </li> <li> <span class="lefttit">正文语种</span> <span>eng</span> </li> <li> <span class="lefttit">中图分类</span> <span><a href="https://www.zhangqiaokeyan.com/clc/163.html" title="地球物理学">地球物理学;</a></span> </li> <li class="antistop"> <span class="lefttit">关键词</span> <p style="width: 86%;vertical-align: text-top;"> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=radiation belt&option=203" rel="nofollow">radiation belt;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=wave‐particle interaction&option=203" rel="nofollow">wave‐particle interaction;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=plasma instability&option=203" rel="nofollow">plasma instability;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=quasi‐periodic VLF/ELF waves&option=203" rel="nofollow">quasi‐periodic VLF/ELF waves;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=ULF pulsations&option=203" rel="nofollow">ULF pulsations;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=solar wind dynamic pressure fluctuations&option=203" rel="nofollow">solar wind dynamic pressure fluctuations;</a> </p> <div class="translation"> 机译：辐射带;波浪粒子相互作用;等离子体不稳定;准周期性VLF / ELF波;ULF脉动;太阳风电压波动; </div> </li> </ul> </div> </div> <div class="literature cardcommon"> <div class="similarity "> <h3 class="all_title" id="enpatent66">相似文献</h3> <div class="similaritytab clearfix"> <ul> <li class="active" >外文文献</li> </ul> </div> <div class="similarity_details"> <ul > <li> <div> <b>1. </b><a class="enjiyixqcontent" href="/journal-foreign-detail/0704019852348.html">Magnetospheric Chorus, Exohiss, and Magnetosonic Emissions Simultaneously Modulated by Fundamental Toroidal Standing Alfvén Waves Following Solar Wind Dynamic Pressure Fluctuations</a> <b>[J]</b> . <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Liu Nigang&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Liu Nigang,</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Su Zhenpeng&option=202" 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