{"title":"A Method for Estimating the Spatial Period of Energy Release in Solar Flares","authors":"L. S. Ledentsov","doi":"10.1134/S1063773723110063","DOIUrl":null,"url":null,"abstract":"<p>A method for estimating the spatial period of energy release in solar flares is proposed to analyze the present-day satellite observations of arcades of flare coronal loops. The method is based on the application of a Fourier analysis to the difference images of flare arcades in the far ultraviolet. The operation of the method is demonstrated with the observations of the Bastille Day flare from the TRACE spacecraft in the 171 Å channel. The mean spatial period of energy release in the Bastille Day flare determined by the proposed method is 5–8 Mm, in good agreement with the scenario for the development of thermal instability of the preflare current layer in solar flares.</p>","PeriodicalId":55443,"journal":{"name":"Astronomy Letters-A Journal of Astronomy and Space Astrophysics","volume":"49 11","pages":"744 - 753"},"PeriodicalIF":1.1000,"publicationDate":"2024-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Astronomy Letters-A Journal of Astronomy and Space Astrophysics","FirstCategoryId":"101","ListUrlMain":"https://link.springer.com/article/10.1134/S1063773723110063","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ASTRONOMY & ASTROPHYSICS","Score":null,"Total":0}
引用次数: 0
Abstract
A method for estimating the spatial period of energy release in solar flares is proposed to analyze the present-day satellite observations of arcades of flare coronal loops. The method is based on the application of a Fourier analysis to the difference images of flare arcades in the far ultraviolet. The operation of the method is demonstrated with the observations of the Bastille Day flare from the TRACE spacecraft in the 171 Å channel. The mean spatial period of energy release in the Bastille Day flare determined by the proposed method is 5–8 Mm, in good agreement with the scenario for the development of thermal instability of the preflare current layer in solar flares.
期刊介绍：
Astronomy Letters is an international peer reviewed journal that publishes the results of original research on all aspects of modern astronomy and astrophysics including high energy astrophysics, cosmology, space astronomy, theoretical astrophysics, radio astronomy, extragalactic astronomy, stellar astronomy, and investigation of the Solar system.
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