Investigations of ram pressure stripping in realistic cluster environments with a multiphase ISM

使用多相 ISM 研究现实集群环境中的冲压压力剥离

• 批准号: 0908390
• 负责人: Greg Bryan
• 金额: $ 30.23万
• 依托单位: Columbia University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-09-01 至 2012-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0908390&HistoricalAwards=false
• 关键词: Investigations; ram; pressure; stripping; realistic

AST-0908390BryanThis award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5).Interactions between the interstellar medium (ISM) of a disk galaxy and the intracluster medium (ICM) of a massive cluster of galaxies will strip gas from infalling galaxies and can lead to color and morphological changes. These interactions can be used as a probe of both ISM and ICM physics. A recent wealth of new data includes observed tails and wakes, and although simulations have shed some light, much remains to be understood, including a mismatch between the predicted and observed width of wakes, the way in which dense, molecular gas is stripped, and the fate of the stripped gas. To answer these questions, this project will increase the realism of stripping simulations, first by adding radiative cooling to idealized galaxies with constant density and velocity winds, using a high-resolution, adaptive-mesh refinement hydrocode. Secondly, those systems will be placed in realistic cosmological simulations of cluster formation and evolution. Finally, the team will add important extra physical processes such as viscosity, heat conduction and magnetic fields into their simulations. Every stage will stress direct observational comparisons.The work will form the core of a PhD thesis, includes a number of projects suitable for undergraduate students, and will involve New York high school teachers and students through the Science Research Training Program. The growing realism of simulations enables high-quality visualizations to convey up-to-date research results to students and the general public, as the PI has done before, in collaboration with the National Center for Supercomputing Applications and the American Museum of Natural History.

本奖项由2009年美国复苏和再投资法案(公共法律111-5)资助。盘状星系的星际介质(ISM)和大质量星系团的星系团介质(ICM)之间的相互作用将从流入的星系中剥离气体，并可能导致颜色和形态的变化。这些相互作用可以用来作为ISM和ICM物理的探针。最近的大量新数据包括观测到的尾巴和尾迹，尽管模拟已经提供了一些线索，但仍有许多有待理解，包括预测的尾迹宽度和观测到的尾迹宽度之间的不匹配，稠密的分子气体被剥离的方式，以及被剥离的气体的命运。为了回答这些问题，这个项目将增加剥离模拟的真实感，首先通过使用高分辨率、自适应网格精化程序，为具有恒定密度和速度风的理想化星系添加辐射冷却。其次，这些系统将被置于真实的宇宙学模拟中，以研究星系团的形成和演化。最后，该团队将在他们的模拟中加入重要的额外物理过程，如粘性、热传导和磁场。每个阶段都将强调直接的观察比较。这项工作将构成博士论文的核心，包括一些适合本科生的项目，并将通过科学研究培训计划涉及纽约高中教师和学生。越来越逼真的模拟使高质量的可视化能够向学生和公众传达最新的研究成果，就像PI以前与国家超级计算应用中心和美国自然历史博物馆合作所做的那样。