The Dynamic Interstellar Medium

星际介质是未来星星形成的物质储备库，也是星星形成过程中反馈的能量和物质的储存库，在星系演化中起着重要作用。我用观察和计算机模拟来建立一个图片的物理过程中的弥漫ISM连接星星形成在小尺度上的星系在大尺度上。我的工作与自治领射电天体物理观测台（DRAO）密切相关。我是加拿大氢强度测绘实验（CHIME）宇宙学团队的积极成员。CHIME的目标是探测宇宙大约一半年龄时的氢，但必须穿过我们生活的银河系。为了消除这一前景，我们必须了解它，所以我通过我的工作对银河系科学与CHIME宇宙学使命的贡献。在接下来的五年里，CHIME将提供一个数据集，使对银河系的前所未有的研究成为可能，产生银河系磁场的三维图像。我还将领导对DRAO综合望远镜进行重大升级的科学使用，使宽带系统能够产生科学，这是加拿大银河平面调查的继承者。我将使用这个新系统来产生一个弧分分辨率的对应CHIME磁场调查，探测银河系平面中的星星形成区域。这次升级还将使我们能够使用数十条射电复合线来绘制整个银河系平面的弥漫电离气体，追踪来自大质量恒星的能量流。在我的模拟中，我结合了与扩散ISM相关的物理学，即来自恒星的加热，来自超新星的热能和动能注入，辐射冷却和垂直重力。这建立了多阶段ISM。有了这笔资助，我将把研究ISM不同阶段的垂直支持所需的物理过程结合起来，特别关注了解不多的热电离阶段。所有这些工作将为包括本科生、研究生和博士后在内的高素质人才提供培训基地。在UBC的Okanagan校区，我们正在努力建立一个研究生天体物理学计划，利用我们的地理位置接近和我与DRAO的密切科学联系。我的学生和博士后将与DRAO的科学和工程人员的独特专业知识。作为加拿大的国家射电天文观测台，DRAO具有一个独特的组合，一个杰出的无线电安静的网站和一个使命，作为加拿大未来的射电天文学家的训练场和新技术和技术的试验台。我的研究项目利用了我的技能和我的团队随时可以进入DRAO的独特机会。我们将利用这些资源将多相星际环境联系在一起，以了解能量和物质如何在星系内传输。

The interstellar medium (ISM) mediates the evolution of galaxies as the reservoir of material for future star formation and the repository for energy and matter fed back by star formation processes. I use both observations and computer simulations to build a picture of the physical processes in the diffuse ISM which connect star formation at small scales to galaxies at large scales. My work is closely tied to the Dominion Radio Astrophysical Observatory (DRAO). I am an active member of the Canadian Hydrogen Intensity Mapping Experiment (CHIME) cosmology team. CHIME aims to detect hydrogen from when the Universe was about half its present age but must look through the Milky Way, the galaxy we live in. In order to remove this foreground, we must understand it, so I contribute to the cosmology mission through my work on Milky Way science with CHIME. Over the next five years, CHIME will provide a data set which enables unprecedented studies of the Milky Way, producing three-dimensional images of the Galactic magnetic field. I will also be a leader in the scientific use of a major upgrade to the DRAO Synthesis Telescope, enabling a wideband system to produce science that is a successor to the wildly successful Canadian Galactic Plane Survey. I will use this new system to produce an arcminute-resolution counterpart to the CHIME magnetic field survey, probing the star forming regions in the Galactic plane. The upgrade will also enable us to use dozens of radio recombination lines to map diffuse ionized gas throughout the Galactic plane, tracing the energy flow from massive stars through the Galaxy. In my simulations, I incorporate the physics that are relevant to the diffuse ISM, namely heating from stars, thermal and kinetic energy injection from supernovae, radiative cooling, and vertical gravity. This establishes a multi-phase ISM. With this grant, I will incorporate physical processes needed to investigate the vertical support of the different phases of the ISM, with particular focus on the poorly-understood warm ionized phase. All of this work will provide a training ground for highly qualified personnel including undergraduate and graduate students and postdocs. At UBC's Okanagan campus, we are working to build a graduate astrophysics program taking advantage of our geographical proximity and my close scientific ties to DRAO. My students and postdocs will work with the unique expertise of DRAO's scientific and engineering staff. As Canada's national radio astronomy observatory, DRAO has a unique combination of an outstanding radio quiet site and a mission to serve as a training ground for Canada's future radio astronomers and a testbed for new technologies and techniques. My research program uses the unique opportunities afforded by my skill set and my group's ready access to DRAO. We will use these resources to link together the multi-phase interstellar environment to understand how energy and matter are transported within galaxies.