日侧磁重联磁鞘侧分离矩阵中的升音哨声波

IF 4.6 1区地球科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY

Geophysical Research Letters Pub Date : 2025-08-18 DOI:10.1029/2025GL116497

Kyunghwan Dokgo, James M. Webster, Kyoung-Joo Hwang, Eunjin Choi, Daniel B. Graham, Hiroshi Hasegawa, James L. Burch, Peter H. Yoon

{"title":"日侧磁重联磁鞘侧分离矩阵中的升音哨声波","authors":"Kyunghwan Dokgo, James M. Webster, Kyoung-Joo Hwang, Eunjin Choi, Daniel B. Graham, Hiroshi Hasegawa, James L. Burch, Peter H. Yoon","doi":"10.1029/2025GL116497","DOIUrl":null,"url":null,"abstract":"We investigate Magnetospheric Multiscale (MMS) observation of the rising-tone whistler waves during the magnetopause asymmetric magnetic reconnection on 24 December 2016. The rising-tone whistler wave propagates toward the electron diffusion region of magnetic reconnection along the magnetic field on the magnetosheath side of the separatrix. The fundamental frequency of the whistler wave is slightly above 0.5 <math>\n <semantics>\n <mrow>\n <msub>\n <mi>F</mi>\n <mrow>\n <mi>c</mi>\n <mi>e</mi>\n </mrow>\n </msub>\n </mrow>\n <annotation> ${F}_{ce}$</annotation>\n </semantics></math> (electron cyclotron frequency) and rises to 1.0 <math>\n <semantics>\n <mrow>\n <msub>\n <mi>F</mi>\n <mrow>\n <mi>c</mi>\n <mi>e</mi>\n </mrow>\n </msub>\n </mrow>\n <annotation> ${F}_{ce}$</annotation>\n </semantics></math>. This study shows that the separatrix can provide favorable conditions for (a) the generation of whistler waves, (b) the frequency chirping of whistler waves, and (c) the local confinement of whistler waves within the narrow separatrix. These rising-tone whistler waves, generated under such conditions, may contribute to the rapid energization of electrons during the magnetic reconnection.","PeriodicalId":12523,"journal":{"name":"Geophysical Research Letters","volume":"52 16","pages":""},"PeriodicalIF":4.6000,"publicationDate":"2025-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1029/2025GL116497","citationCount":"0","resultStr":"{\"title\":\"Rising-Tone Whistler Wave in a Magnetosheath Side Separatrix of Dayside Magnetic Reconnection\",\"authors\":\"Kyunghwan Dokgo, James M. Webster, Kyoung-Joo Hwang, Eunjin Choi, Daniel B. Graham, Hiroshi Hasegawa, James L. Burch, Peter H. Yoon\",\"doi\":\"10.1029/2025GL116497\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"We investigate Magnetospheric Multiscale (MMS) observation of the rising-tone whistler waves during the magnetopause asymmetric magnetic reconnection on 24 December 2016. The rising-tone whistler wave propagates toward the electron diffusion region of magnetic reconnection along the magnetic field on the magnetosheath side of the separatrix. The fundamental frequency of the whistler wave is slightly above 0.5 <math>\\n <semantics>\\n <mrow>\\n <msub>\\n <mi>F</mi>\\n <mrow>\\n <mi>c</mi>\\n <mi>e</mi>\\n </mrow>\\n </msub>\\n </mrow>\\n <annotation> ${F}_{ce}$</annotation>\\n </semantics></math> (electron cyclotron frequency) and rises to 1.0 <math>\\n <semantics>\\n <mrow>\\n <msub>\\n <mi>F</mi>\\n <mrow>\\n <mi>c</mi>\\n <mi>e</mi>\\n </mrow>\\n </msub>\\n </mrow>\\n <annotation> ${F}_{ce}$</annotation>\\n </semantics></math>. This study shows that the separatrix can provide favorable conditions for (a) the generation of whistler waves, (b) the frequency chirping of whistler waves, and (c) the local confinement of whistler waves within the narrow separatrix. These rising-tone whistler waves, generated under such conditions, may contribute to the rapid energization of electrons during the magnetic reconnection.\",\"PeriodicalId\":12523,\"journal\":{\"name\":\"Geophysical Research Letters\",\"volume\":\"52 16\",\"pages\":\"\"},\"PeriodicalIF\":4.6000,\"publicationDate\":\"2025-08-18\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1029/2025GL116497\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Geophysical Research Letters\",\"FirstCategoryId\":\"89\",\"ListUrlMain\":\"https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2025GL116497\",\"RegionNum\":1,\"RegionCategory\":\"地球科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"GEOSCIENCES, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Geophysical Research Letters","FirstCategoryId":"89","ListUrlMain":"https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2025GL116497","RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"GEOSCIENCES, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

摘要

对2016年12月24日磁层顶不对称磁重联期间的升调哨声波进行了磁层多尺度观测。升音哨声波沿分离矩阵磁鞘侧的磁场向磁重联的电子扩散区传播。哨声波的基频略高于0.5 F ce ${F}_{ce}$（电子回旋频率），上升到1.0 Fce ${F}_{ce}$。研究表明，分离矩阵可以为(a)哨声波的产生，(b)哨声波的频率啁啾，(c)哨声波在窄分离矩阵内的局部约束提供有利条件。在这种条件下产生的这些音调上升的哨声波可能有助于磁重联过程中电子的快速通电。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Rising-Tone Whistler Wave in a Magnetosheath Side Separatrix of Dayside Magnetic Reconnection

查看原文本刊更多论文

Rising-Tone Whistler Wave in a Magnetosheath Side Separatrix of Dayside Magnetic Reconnection

We investigate Magnetospheric Multiscale (MMS) observation of the rising-tone whistler waves during the magnetopause asymmetric magnetic reconnection on 24 December 2016. The rising-tone whistler wave propagates toward the electron diffusion region of magnetic reconnection along the magnetic field on the magnetosheath side of the separatrix. The fundamental frequency of the whistler wave is slightly above 0.5 $F_{c e}$ (electron cyclotron frequency) and rises to 1.0 $F_{c e}$ . This study shows that the separatrix can provide favorable conditions for (a) the generation of whistler waves, (b) the frequency chirping of whistler waves, and (c) the local confinement of whistler waves within the narrow separatrix. These rising-tone whistler waves, generated under such conditions, may contribute to the rapid energization of electrons during the magnetic reconnection.

求助全文

通过发布文献求助，成功后即可免费获取论文全文。去求助

来源期刊

Geophysical Research Letters 地学-地球科学综合

CiteScore

9.00

自引率

9.60%

发文量

1588

审稿时长

2.2 months

期刊介绍： Geophysical Research Letters (GRL) publishes high-impact, innovative, and timely research on major scientific advances in all the major geoscience disciplines. Papers are communications-length articles and should have broad and immediate implications in their discipline or across the geosciences. GRLmaintains the fastest turn-around of all high-impact publications in the geosciences and works closely with authors to ensure broad visibility of top papers.