Cosmic rays in the galactic environment

银河环境中的宇宙射线

• 批准号: 1008454
• 负责人: Mateusz Ruszkowski
• 金额: $ 39.47万
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-09-15 至 2015-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1008454&HistoricalAwards=false
• 关键词: Cosmic; rays; galactic; environment

This project is a theoretical and computational effort to understand quantitatively the effects of cosmic rays on the interstellar gas in galaxies. The Principal Investigator and a postdoctoral researcher supported and mentored under this award, along with collaborators, will develop and implement a cosmic-ray physics module for the widely used magnetohydrodynamic (MHD) code FLASH. This module will permit the simulation of anisotropic thermal conduction and viscosity, and a broad array of cosmic ray energy loss, acceleration, and transfer processes; the new module will be tested against the predictions of linear theory. The team will then use the enhanced FLASH code to (1) simulate the formation of, and internal physical conditions in, molecular clouds, using a two-fluid approximation; (2) simulate the effects of cosmic rays on important MHD instabilities known or suspected to be important in galactic disks; (3) model the correlation between radio and far-infrared emission observed in starburst galaxies; (4) model the radio synchrotron emission from galaxy halos; (5) model the diffuse gamma-ray emission from galactic winds; and (6) model the stripping of galactic gas through interactions with the surrounding intergalactic medium. The Principal Investigator will also participate in an extensive list of outreach activities, including creation of a museum exhibit, public lectures, design of planetarium shows, telescope tours, popular writings, and coordination between his academic department and schools.

该项目是一种理论和计算的努力，旨在定量地了解宇宙射线对星系中星系中气体的影响。首席研究员和博士后研究人员与合作者一起支持和指导了该奖项，并将为广泛使用的磁性水力动力学（MHD）代码闪光灯开发和实施一个宇宙射线物理模块。该模块将允许模拟各向异性热传导和粘度，以及一系列宇宙射线能量损失，加速和转移过程；新模块将根据线性理论的预测进行测试。然后，团队将使用增强的闪存代码（1）使用两流体近似模拟分子云中的形成和内部物理条件； （2）模拟宇宙射线对已知或怀疑在银河磁盘中很重要的重要MHD不稳定性的影响； （3）模拟在星爆星系中观察到的无线电和远红外发射之间的相关性； （4）对Galaxy Halos的无线电同步发射建模； （5）模拟银河风的弥漫性伽马射线发射； （6）通过与周围的银河系间介质相互作用对银河气体的剥离进行建模。首席调查员还将参加广泛的外展活动清单，包括创建博物馆展览，公开演讲，天文馆展览的设计，望远镜之旅，流行的著作以及他的学术部门和学校之间的协调。