Collaborative Research: Baryons and Dark Matter in Galaxies

合作研究：星系中的重子和暗物质

• 批准号: 0709055
• 负责人: George Rhee
• 金额: $ 8.7万
• 依托单位: University of Nevada Las Vegas
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-09-01 至 2011-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0709055&HistoricalAwards=false
• 关键词: Collaborative; Research; Baryons; Dark; Matter

AST-0708185/0709055Klypin/RheeThis is a collaborative project between Dr Anatoly Klypin of New Mexico State University and Dr George Rhee of the University of Nevada Las Vegas. It will be an extensive observational and theoretical study of the dynamics and structure of galaxies, and includes confronting these with cosmological models. Detailed analysis of the central few kiloparsecs of galaxies is the only way to settle the small-scale disagreement between observations and theoretical predictions in the standard cosmological model. The project will study complex gas and star motions in the central regions of galaxies using full-scale cosmological simulations with a zoom-in technique for resolving a few individual galaxies, plus separate evolution of 'disk plus bulge plus dark matter halo' systems. The researchers will also work to improve the analytical treatment of different effects relevant for modeling these central regions. This includes non-circular motions, triaxiality and asymmetry, changes in eccentricity, asymmetric drift corrections, and a multi-phase gas medium. Finally, this research includes observations to measure the different effects which complicate the modeling of galaxies, such as the magnitude and structure of non-circular motions, the contribution of the stellar component, and the rotation and velocity dispersion of the old stellar component.Results of the work will be made available to the media, who have in the past made use of this team's images, and will be disseminated through public lectures. The studies will train graduate students in the skills required to become independent researchers, and involve them in undergraduate teaching. The team will continue its tradition of organizing conferences which include both theorists and observers. This work helps to raise the profile of astronomy, and science in general, in Nevada.

AST-0708185/0709055 Klypin/Rhee这是新墨西哥州州立大学的Anatoly Klypin博士和内华达州拉斯维加斯大学的乔治Rhee博士之间的合作项目。 这将是一个广泛的观测和理论研究的动力学和星系的结构，并包括面对这些与宇宙学模型。 对星系中心几千秒差距的详细分析是解决标准宇宙学模型中观测和理论预测之间小尺度分歧的唯一途径。 该项目将研究复杂的气体和星星在星系中心区域的运动，使用全面的宇宙学模拟与放大技术，以解决一些个别星系，加上单独的演变“盘加隆起加暗物质晕”系统。 研究人员还将努力改进与这些中心区域建模相关的不同效应的分析处理。 这包括非圆运动、三轴性和不对称性、偏心率的变化、不对称漂移校正和多相气体介质。 最后，这项研究包括观测测量使星系建模复杂化的不同影响，例如非圆形运动的大小和结构，恒星成分的贡献，以及旧恒星成分的旋转和速度色散。工作结果将提供给媒体，他们过去使用了这个团队的图像，并将通过公开讲座进行传播。 这些研究将培养研究生成为独立研究人员所需的技能，并让他们参与本科教学。 该小组将继续其组织会议的传统，其中包括理论家和观察员。 这项工作有助于提高内华达州的天文学和一般科学的知名度。