{"title":"Formation of Near-Surface Toroidal Magnetic Fields of the Sun. Extended Solar Cycle","authors":"A. G. Tlatov","doi":"10.1134/S1062873825711729","DOIUrl":null,"url":null,"abstract":"<p>Observational aspects of the formation of near-surface toroidal magnetic fields on the Sun were considered. Based on the analysis of magnetic field observations in the period 2010–2024, diagrams of the distribution of horizontal magnetic fields and magnetic bipoles of ephemeral regions in the solar cycle were obtained. The obtained diagrams are close to the concept of an extended cycle of solar activity. The formation of surface azimuthal magnetic fields was modeled based on the evolution of U-shaped magnetic bipoles of active regions. The modeling took into account near-equatorial bipoles with a magnetic field propagating through the solar equator; this made it possible to achieve good agreement with the duration of the azimuthal field polarity at low latitudes.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"89 7","pages":"1071 - 1077"},"PeriodicalIF":0.4800,"publicationDate":"2025-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Bulletin of the Russian Academy of Sciences: Physics","FirstCategoryId":"1085","ListUrlMain":"https://link.springer.com/article/10.1134/S1062873825711729","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"Physics and Astronomy","Score":null,"Total":0}
引用次数: 0
Abstract
Observational aspects of the formation of near-surface toroidal magnetic fields on the Sun were considered. Based on the analysis of magnetic field observations in the period 2010–2024, diagrams of the distribution of horizontal magnetic fields and magnetic bipoles of ephemeral regions in the solar cycle were obtained. The obtained diagrams are close to the concept of an extended cycle of solar activity. The formation of surface azimuthal magnetic fields was modeled based on the evolution of U-shaped magnetic bipoles of active regions. The modeling took into account near-equatorial bipoles with a magnetic field propagating through the solar equator; this made it possible to achieve good agreement with the duration of the azimuthal field polarity at low latitudes.
期刊介绍：
Bulletin of the Russian Academy of Sciences: Physics is an international peer reviewed journal published with the participation of the Russian Academy of Sciences. It presents full-text articles (regular, letters to the editor, reviews) with the most recent results in miscellaneous fields of physics and astronomy: nuclear physics, cosmic rays, condensed matter physics, plasma physics, optics and photonics, nanotechnologies, solar and astrophysics, physical applications in material sciences, life sciences, etc. Bulletin of the Russian Academy of Sciences: Physics focuses on the most relevant multidisciplinary topics in natural sciences, both fundamental and applied. Manuscripts can be submitted in Russian and English languages and are subject to peer review. Accepted articles are usually combined in thematic issues on certain topics according to the journal editorial policy. Authors featured in the journal represent renowned scientific laboratories and institutes from different countries, including large international collaborations. There are globally recognized researchers among the authors: Nobel laureates and recipients of other awards, and members of national academies of sciences and international scientific societies.
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