CAREER: Feedback Tomography

Arizona大学的Dr. AdelDave博士将使用最先进的流体动力学模拟进行反馈断层扫描的理论研究，该模拟动态地结合了流出和复杂的化学演变。基于非常成功的宇宙尺度星系外流模型，该计划将重点放在星系的周围，以更好地了解星系晕内和周围的流入，流出和环境气体之间的复杂相互作用。一个主要的目标是将可观测的吸收线示踪剂与气体的物理性质，如运动学，密度，温度和金属丰度联系起来。通过仔细比较模型与现有和即将到来的数据，宇宙学框架的情况下，将开发如何质量，金属和能量循环进出星系。将研究这种循环如何共同建立跨宇宙时间的星系间介质和星系的关键属性的影响。此外，将探讨途径，以改善和优化现有代码中的大规模外流建模，使用仔细约束的测试问题。 通过这种多方面的努力，对星系外流及其对星系性质的影响的理解将大大提高。作为这项工作的一部分，戴夫博士将制作一部关于星系形成原理的教育电影，重点是观察和模拟如何共同工作，以增加我们对星系形成的理解。这一教学工具将被设计用于课堂或作为独立的电影观看，将用于帮助激发教师和公众对日益重要的河外天文学这一子领域的兴趣。 此外，戴夫博士将帮助开发和进行天文学出国留学计划在加纳的先进的本科生来自美国和非洲。该计划将在第一周教授河外天文学的基本概念，然后教学生利用在线观测和模拟数据库来询问和回答有关星系形成中当前问题的问题。

Dr. Romeel Dave' (University of Arizona) will carry out a theoretical study of feedback tomography using state of the art hydrodynamic simulations that dynamically incorporate outflows and sophisticated chemical evolution. Building on highly successful models of cosmic-scale galactic outflows, this program will focus on the environs of galaxies to better understand the complex interplay between inflows, outflows, and ambient gas in and around galactic halos. A primary goal will be to connect observable absorption-line tracers with physical properties of the gas such as kinematics, density, temperature, and metallicity. Through careful comparisons of models with available and forthcoming data, a cosmologically framed scenario will be developed for how mass, metals, and energy cycle in and out of galaxies. Implications will be investigated for how such cycling jointly establishes key properties of the inter-galactic medium and galaxies across cosmic time. Additionally, avenues will be explored for improving and optimizing the modeling of outflows on large scales within current codes, using carefully constrained test problems. Through this multi-faceted effort, the understanding of galactic outflows and their impact on galaxy properties will be greatly advanced. As a part of this work Dr. Dave' will produce an educational movie on the principles of galaxy formation, with a focus on how observations and simulations work together to increase our understanding of galaxy formation. This pedagogical tool, which will be designed to be used in classrooms or viewed as a stand-alone film, will be used to help spur interest in the increasingly important subfield of extragalactic astronomy, both among teachers and the general public. In addition, Dr. Dave' will help develop and conduct an astronomy study abroad program in Ghana for advanced undergraduates from the United States and Africa. The program will teach basic concepts of extragalactic astronomy in the first week, and then teach students to utilize online observational and simulation databases to ask and answer questions about current problems in galaxy formation.