Magnetohydrodynamic and kinetic models of magnetic reconnection applied to solar coronal activity

应用于太阳日冕活动的磁重联的磁流体动力学和动力学模型

• 批准号: ST/F003064/1
• 负责人: Philippa Browning
• 金额: $ 59.13万
• 依托单位: University of Manchester
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2008
• 资助国家: 英国
• 起止时间: 2008 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=ST%2FF003064%2F1
• 关键词: Magnetohydrodynamic; kinetic; models; magnetic; reconnection

The atmosphere of the Sun, the corona, is very dynamic. Solar flares are dramatic events which release large amounts of energy in the form of electromagnetic radiation across the spectrum, resulting both from the creation of hot plasma and from large numbers of high energy non-thermal charged particles. Solar flares can have significant effects on the Earth and its space environment, and can be a very serious issue for humans in space. Also, it is believed that the surprisingly high temperature of coronal plasma (milllions of degrees, compared with a surface temperature of a few thousand degrees) may be the result of heating by many small flare-like events known as nanoflares. Both flares and nanoflares are a release of stored magnetic energy through the process of magnetic reconnection, which results both in heating of the plasma and in the acceleration of charged particles. The aim of our research is to investigate the energy release due to magnetic reconnection, using both fluid and kinetic models of the plasma, and to apply the results to understand both coronal heating and flares. We also aim to determine consequences of reconnection which are directly observable, and to test our models using observations from space borne solar observatories such as TRACE,RHESSI, Hinode and Stereo.

太阳的气氛，电晕，非常动态。太阳耀斑是戏剧性的事件，在整个光谱上以电磁辐射的形式释放大量能量，这既是由于热等离子体的产生和大量的高能量非热电带电颗粒而产生的。太阳耀斑可能会对地球及其太空环境产生重大影响，对于人类在太空中可能是一个非常严重的问题。同样，据信，冠状血浆的高温（与几千度的表面温度相比，千万度（千万度）可能是许多被称为纳米体的小火炬样事件加热的结果。耀斑和纳米弹药都是通过磁重新连接的过程释放储存的磁能，这既导致血浆加热和带电颗粒的加速。我们研究的目的是使用等离子体的流体和动力学模型研究由于磁重新连接而引起的能量释放，并应用结果以了解冠状加热和耀斑。我们还旨在确定可直接可观察到的重新连接的后果，并使用太空阳离子天文台（例如Trace，Rhessi，Hinode和Stereo）的观测值测试我们的模型。

项目成果

The Flare-Energy Distributions Generated by Kink-Unstable Ensembles of Zero-Net-Current Coronal Loops

• DOI: 10.1007/s11207-011-9832-4
• 发表时间: 2011-10-01
• 期刊: SOLAR PHYSICS
• 影响因子: 2.8
• 作者: Bareford, M. R.;Browning, P. K.;Van der Linden, R. A. M.
• 通讯作者: Van der Linden, R. A. M.

A nanoflare distribution generated by repeated relaxations triggered by kink instability

• DOI: 10.1051/0004-6361/201014067
• 发表时间: 2010-10-01
• 期刊: ASTRONOMY & ASTROPHYSICS
• 影响因子: 6.5
• 作者: Bareford, M. R.;Browning, P. K.;Van der Linden, R. A. M.
• 通讯作者: Van der Linden, R. A. M.

Particle acceleration in a transient magnetic reconnection event

• DOI: 10.1051/0004-6361/200913569
• 发表时间: 2010-09
• 期刊: Astronomy and Astrophysics
• 影响因子: 6.5
• 作者: M. Gordovskyy;P. Browning;G. Vekstein

MICROFLARE ACTIVITY DRIVEN BY FORCED MAGNETIC RECONNECTION

• DOI: 10.1088/2041-8205/712/1/l111
• 发表时间: 2010-02
• 期刊: The Astrophysical Journal Letters
• 作者: D. Jess;M. Mathioudakis;P. Browning;P. J. Crockett;F. Keenan

Scaling of particle acceleration in 3D reconnection at null points

• DOI: 10.1051/0004-6361/201014964
• 发表时间: 2010-09
• 期刊: Astronomy and Astrophysics
• 影响因子: 6.5
• 作者: P. Browning;S. Dalla;D. Peters;J. Smith