Multiscale investigations of the galactic magnetic field

银河磁场的多尺度研究

• 批准号: 341533-2011
• 负责人: Brown, JoAnne
• 金额: $ 1.6万
• 依托单位: University of Calgary
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=572283
• 关键词: Multiscale; investigations; galactic; magnetic; field

Electromagnetism is one of the four fundamental forces in Nature. Electric and magnetic fields affect us in more ways than it is possible to list. This is true across all scales, from the very small, such as the electric impulses that control our bodies, to the very large, such as the magnetic field of the Earth that protects us from the ionized Solar wind. In fact, electric and magnetic fields are important throughout the cosmos, helping to form stars and providing support against gravitational collapse in galaxies. While we have known about the Earth's magnetic field for centuries (the discovery of a magnetic compass is attributed to China around 1000 AD), the idea of a Galactic magnetic field was only proposed in 1949 by Enrico Fermi. Proper studies of the Galactic magnetic field beyond the spiral arm that our Sun is located in only began in the late 1970's. Considering the first scientific description of the Earth's magnetic field was in 1600 AD, the study of the Galactic magnetic field is truly in its infancy. My research project entitled "Multiscale Investigations of the Galactic Magnetic Field" is designed to further explore the relationship of the Galactic magnetic field and the interstellar medium (also known as 'the stuff between the stars'). Understanding what the magnetic field looks like now and how it is coupled to the interstellar medium will allow us to determine how the field was originally generated and how it is evolving. The long term goal of this work is to develop an understanding of the role of magnetic fields in the formation and evolution of galaxies in general.

电磁力是自然界的四种基本力量之一。电场和磁场对我们的影响比我们可能列举的更多。这在所有尺度上都是正确的，从非常小的，比如控制我们身体的电脉冲，到非常大的，比如保护我们免受电离太阳风影响的地球磁场。事实上，电场和磁场在整个宇宙中都很重要，有助于恒星的形成，并为星系提供抵抗引力坍塌的支持。 虽然我们对地球磁场的了解已经有几个世纪了(磁罗盘的发现是中国在公元1000年左右提出的)，但银河系磁场的想法直到1949年才由恩里科·费米提出。对太阳所在螺旋臂以外的银河系磁场的适当研究直到20世纪70年代末才开始，S。考虑到第一次科学描述地球磁场是在公元1600年，对银河系磁场的研究真正处于初级阶段。 我的研究项目名为《银河系磁场的多尺度研究》，旨在进一步探索银河系磁场与星际介质(也称为星际物质)之间的关系。了解现在的磁场是什么样子，以及它是如何耦合到星际介质上的，将使我们能够确定磁场最初是如何产生的，以及它是如何演变的。这项工作的长期目标是从总体上理解磁场在星系形成和演化中的作用。