发布求助
文献互助 智能选刊 最新文献

Discover space最新文献

筛选
英文 中文
A bound for relative magnetic helicity in terms of free magnetic energy. 用自由磁能表示的相对磁螺旋度的界限。
Discover space Pub Date : 2025-01-01 Epub Date: 2025-12-08 DOI: 10.1007/s11038-025-09578-8
David MacTaggart
{"title":"A bound for relative magnetic helicity in terms of free magnetic energy.","authors":"David MacTaggart","doi":"10.1007/s11038-025-09578-8","DOIUrl":"10.1007/s11038-025-09578-8","url":null,"abstract":"<p><p>The topological complexity of magnetic fields in astrophysics can be described with the aid of magnetic helicity. Amongst its many properties, magnetic helicity provides a bound on the magnetic energy. Whilst this is a very elegant result, classical magnetic helicity, which applies to closed magnetic fields, is not suitable in many astrophysical problems, e.g. modelling active regions in the solar atmosphere. Instead, the classical definition must be replaced by relative helicity, which is able to include open magnetic fields. The purpose of this note is to extend the classical helicity-energy bound to show that an analogous relationship holds between relative magnetic helicity and the free magnetic energy, i.e. the magnetic energy available above the minimum-energy field. The bound is constructed by considering a self-mutual decomposition of relative helicity, which provides information on how the structure of the magnetic field is constrained for a given value of free energy.</p>","PeriodicalId":521159,"journal":{"name":"Discover space","volume":"129 1","pages":"19"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12713518/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145807177","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：604180095
Book学术官方微信
小红书