Understanding the Nature of Clouds in Galactic Winds

了解银河风中云的本质

• 批准号: 0807623
• 负责人: Kip Kuntz
• 金额: $ 17.77万
• 依托单位: Johns Hopkins University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-08-01 至 2013-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0807623&HistoricalAwards=false
• 关键词: Understanding; Nature; Clouds; Galactic; Winds

Dr Strickland's work will improve our understanding of the 'superwinds' that emerge from star-forming galaxies. These powerful multiphase outflows are important for understanding the development of star-forming galaxies, and how nascent galaxies heat and enrich the intergalactic medium. The proposed research will address two competing mechanisms for cloud acceleration: the ram pressure of the outflowing wind, and radiation pressure. Dr. Strickland will develop numerical tools for determining the observable signatures corresponding to different models of cloud acceleration, and will model large populations of clouds, as opposed to single clouds alone. The work combines analytical approaches with pre-calculated hydrodynamical simulations. It will incorporate several physical effects that are often neglected in studies of clouds in galactic winds, including thermal conduction, stripping, and the dynamical effects of the wind on the clouds. The numerical codes and simulation tools will be made available to the community, so that observers can compare their data with predictions of the various wind models. The research will help to understand galaxy feedback, which is one of the least understood but important processes in the study of galaxy formation and evolution.

Strickland博士的工作将提高我们对星形星系中出现的“超级风波”的理解。 这些强大的多相流出对于理解星形星系的发展以及新生星系如何加热并丰富了呈乳体层的介质很重要。 拟议的研究将解决云加速度的两种竞争机制：流出的风的RAM压力和辐射压力。 Strickland博士将开发数值工具，用于确定与云加速的不同模型相对应的可观察到的签名，并将建模大量的云种群，而不是仅单个云。 该作品将分析方法与预计算的流体动力学模拟相结合。 它将结合几种物理效应，这些效应通常在银河风中的云研究中被忽略，包括热传导，剥离以及风对云对云的动态效应。数值代码和仿真工具将提供给社区，以便观察者可以将其数据与各种风模型的预测进行比较。 这项研究将有助于了解星系反馈，这是研究银河形成和进化研究中最知名但重要的过程之一。