Collaborative Research: Exploring the impact of cosmic ray feedback on galaxy evolution

合作研究：探索宇宙射线反馈对星系演化的影响

基本信息

批准号：
1715140
负责人：
Mateusz Ruszkowski
金额：
$ 52.74万
依托单位：
Regents of the University of Michigan - Ann Arbor
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2017
资助国家：
美国
起止时间：
2017-07-01 至 2021-06-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1715140&HistoricalAwards=false
关键词：
Collaborative Research Exploring impact cosmic

项目摘要

Astronomers seek to understand how galaxies formed and evolve. Vast filaments of matter coalesce into galaxies under gravity. However, unknown forces from within expel gas in the form of galactic winds. Ruszkowski and collaborators seek to understand whether this missing force could be provided by cosmic rays. Using computer simulations, they will study effects of cosmic rays on galactic winds. They will determine whether cosmic rays contribute sufficient force to these winds to expel matter from galaxies completely. Finally understanding what powers galactic winds will contribute a major advance. This study may enable a qualitative leap in our understanding of how galaxies evolve. Results of these simulations will be used in stunning planetarium animations. Such visualizations engage the public and inspire young people to study science.This study will probe a range of spatial scales. It will include hybrid kinetic simulations of cosmic ray propagation around isolated supernova remnants out to galactic disks and finally to cosmological galaxy formation. Cosmic-ray transport physics will be simulated from first principles. Local patches of the interstellar medium will be simulated using adaptive mesh refinement. These results in turn will be used to develop sub-grid models for galaxy and cosmological formation simulations. This project will constitute the first large-scale study of galaxy formation to include cosmic-ray transport processes on all spatial scales. It will yield specific predictions for the properties of cosmic-ray driven galactic winds.

天文学家试图了解星系的形成和发展。重力下的大量物质结合到星系中。但是，以银河风的形式从驱逐气体内部的未知力。 Ruszkowski和合作者试图了解宇宙射线是否可以提供这种失踪力量。使用计算机模拟，他们将研究宇宙射线对银河风的影响。他们将确定宇宙射线是否为这些风能贡献足够的力，以完全排出星系。最终，了解什么力量银河将贡献重大进展。这项研究可能使我们能够理解星系如何发展。这些模拟的结果将用于令人惊叹的天文馆动画。这种可视化吸引了公众，并激发了年轻人学习科学。这项研究将探讨一系列空间尺度。它将包括围绕分离的超新星残留物围绕银河磁盘的宇宙射线传播的杂种动力学模拟，最后是宇宙星系形成。宇宙射线运输物理将从第一原理模拟。星际介质的局部斑块将使用自适应网状细化进行模拟。这些结果反过来将用于开发用于银河系和宇宙学模拟的子网格模型。该项目将构成第一项对星系组的大规模研究，其中包括所有空间尺度上的宇宙射线运输过程。它将对宇宙射线驱动银河风的性质产生特定的预测。