The Sun: solar dynamo located near the surface

IF 12.9 1区物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS

Nature Astronomy Pub Date : 2024-06-20 DOI:10.1038/s41550-024-02311-x

Bishwanath Gaire

引用次数: 0

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太阳：位于地表附近的太阳发电机

太阳动力循环是太阳活动和太阳磁场的一个过程，据信它位于太阳内部深处，即外层对流区和内层辐射区之间的边界--塔克线（tachocline）内。最近，杰弗里-瓦西尔及其同事报告了他们的最新模拟结果，这些结果支持了太阳动力学起源于太阳表面附近（外层 5-10%）的观点。其基本机制是磁旋转不稳定性（MRI）在近表面剪切层（NSSL）中运行，并负责驱动太阳动力。作者受到吸积盘中等离子体流的磁旋转不稳定性的启发，并将其用于理解太阳动力。他们求解了NSSL物理环境下的线性化无弹性磁流体动力学方程，发现了密度分层对阿尔芬速度的影响。估算出的阿尔弗韦恩速度在驱动核磁共振所需的内部磁场范围内。Dedalus 代码用于模拟太阳周期的初始阶段，随着太阳周期的演化，环磁场经历了几种可能的 MHD 不稳定（包括磁共振成像），导致极磁场再生。总体分析支持存在导致半球形磁流螺旋规律和磁共振成像增长的不稳定模式。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Nature Astronomy Physics and Astronomy-Astronomy and Astrophysics

CiteScore

19.50

自引率

2.80%

发文量

252

期刊介绍： Nature Astronomy, the oldest science, has played a significant role in the history of Nature. Throughout the years, pioneering discoveries such as the first quasar, exoplanet, and understanding of spiral nebulae have been reported in the journal. With the introduction of Nature Astronomy, the field now receives expanded coverage, welcoming research in astronomy, astrophysics, and planetary science. The primary objective is to encourage closer collaboration among researchers in these related areas. Similar to other journals under the Nature brand, Nature Astronomy boasts a devoted team of professional editors, ensuring fairness and rigorous peer-review processes. The journal maintains high standards in copy-editing and production, ensuring timely publication and editorial independence. In addition to original research, Nature Astronomy publishes a wide range of content, including Comments, Reviews, News and Views, Features, and Correspondence. This diverse collection covers various disciplines within astronomy and includes contributions from a diverse range of voices.