Analysis of ultraviolet radiation from solar flares

太阳耀斑紫外线辐射分析

• 批准号: 2604000
• 金额: --
• 依托单位: University of Glasgow
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2021
• 资助国家: 英国
• 起止时间: 2021 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2604000
• 关键词: Analysis; ultraviolet; radiation; solar; flares

Solar flares are dramatic outbursts of radiation originating in the solar atmosphere. Flares, and the often-associated coronal mass ejections, can have an impact on the Earth's environment, so understanding the flare process - and perhaps at some point predicting when a flare will start - is of great interest. A flare radiates across the entire electromagnetic spectrum, from radio to gamma-rays, but most of the radiated energy emerges in the optical and ultraviolet part of the spectrum. It is by analysing the radiation from solar flares that we learn about their properties; how the flare energy is released and travels through the solar atmosphere, and how it is linked to the evolving solar magnetic field. In this project we will use data from NASA's Interface Region Imaging Spectrograph (IRIS) satellite to study solar flares, and characterise the physical properties of the solar atmosphere. For the first time we will systematically apply a technique to derive the density and speed of the radiating material to a large dataset, employing machine learning methods to improve the efficiency of the analysis. We will track the development of the flare, starting from before its onset, to look for clues about how a flare begins, which could potentially help in prediction. This research falls under the STFC's Astronomy Programme, addressing questions about how the Sun works and what drives its variability.

太阳耀斑是源自太阳大气层的剧烈辐射爆发。耀斑和经常伴随的日冕物质抛射会对地球环境产生影响，因此了解耀斑过程--也许在某个时候预测耀斑何时开始--是非常有趣的。耀斑辐射的电磁波覆盖了从无线电到伽马射线的整个电磁波谱，但大部分辐射能量出现在光谱的光学和紫外部分。通过分析太阳耀斑的辐射，我们了解了它们的特性;耀斑能量如何释放并穿过太阳大气层，以及它如何与不断变化的太阳磁场联系在一起。在这个项目中，我们将使用来自美国宇航局的界面区域成像光谱仪（IRIS）卫星的数据来研究太阳耀斑，并模拟太阳大气的物理特性。我们将首次系统地应用一种技术，将辐射材料的密度和速度导出到大型数据集，采用机器学习方法来提高分析效率。我们将跟踪耀斑的发展，从它发生之前开始，寻找有关耀斑如何开始的线索，这可能有助于预测。这项研究福尔斯属于STFC的天文学计划，解决有关太阳如何工作以及是什么驱动其变化的问题。