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Solar, stellar and cosmological plasmas: a synthesis of data, modelling and theory.

太阳、恒星和宇宙等离子体：数据、模型和理论的综合。

基本信息

批准号：
ST/F002149/1
负责人：
Declan Diver
金额：
$ 165.08万
依托单位：
University of Glasgow
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%2FF002149%2F1
关键词：
Solar stellar cosmological plasmas synthesis

项目摘要

The physics of plasmas - particularly magnetised plasmas - dictates the behaviour of much of the visible universe, from the outer layers of the Sun to the furthest reaches of the observable cosmos. In this proposal, we focus on several key unsolved problems in plasma astrophysics that are also prototypes for a wider and deeper understanding of cosmic plasmas as a whole. These are: (a) how do high-energy radiating electrons, ions and neutrons behave in solar flares and in interplanetary space? How are they accelerated, are they beamed and do they play a key role in flares and their terrestrial impact? (b) how does the Sun store and release energy in its magnetised atmosphere, from surface flows, to low atmosphere flaring activity, coronal mass ejections and interplanetary shocks? And what can be learned from the behaviour of solar plasmas to help resolve controversies over plasma structures like disks and clumps around hot stars or magnetised stars that are just forming? (c) How do pulsars radiate? How might the changing magnetic field at the decoupling era (the very early universe) seed the cosmos with energetic particles and influence the formation of structure? Our programme combines observational data with theoretical and numerical modelling, and spans a wide range of astronomical and technical problems, from solar surface flows to high-energy particle acceleration and circumstellar matter; from electromagnetic waves to relativistic particle beams; from image processing to statistical analysis of weak signals. We will bring all these skills to bear on astronomical questions at the heart of current efforts to better understand the universe.

等离子体的物理学--特别是磁化等离子体--决定了大部分可见宇宙的行为，从太阳的外层到可观测宇宙的最远处。在这个提议中，我们专注于等离子体天体物理学中几个关键的未解决的问题，这些问题也是对宇宙等离子体整体更广泛和更深入理解的原型。这些问题是：（a）高能辐射电子、离子和中子在太阳耀斑和行星际空间中的行为如何？它们是如何被加速的，它们是否被发射，它们在耀斑及其对地球的影响中是否起着关键作用？(b)太阳如何在其磁化的大气层中储存和释放能量，从表面流动到低大气层的耀斑活动，日冕物质抛射和行星际冲击？从太阳等离子体的行为中可以学到什么，以帮助解决围绕热恒星或刚刚形成的磁化恒星周围的盘和团块等离子体结构的争议？(c)太阳是如何辐射的？在退耦时代（宇宙的早期），磁场的变化如何为宇宙带来高能粒子，并影响结构的形成？我们的方案将观测数据与理论和数值模拟相结合，涵盖范围广泛的天文和技术问题，从太阳表面流到高能粒子加速和星周物质;从电磁波到相对论粒子束;从图像处理到弱信号的统计分析。我们将利用所有这些技能来解决天文学问题，这些问题是目前更好地了解宇宙的努力的核心。