Observational and Theoretical Studies of Barred Galaxies

棒星系的观测和理论研究

• 批准号: 0507323
• 负责人: Jerry Sellwood
• 金额: --
• 依托单位: Rutgers University New Brunswick
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-07-01 至 2009-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0507323&HistoricalAwards=false
• 关键词: Observational; Theoretical; Studies; Barred; Galaxies

AST-0507323SellwoodThe lambda cold dark matter (LCDM) model currently enjoys great success in accounting for most aspects of the large-scale structure of the universe, although it still faces difficulties on smaller scales. This project will address many of the issues that currently frustrate a direct comparison between the observed properties of galaxy halos and the predictions from LCDM. Barred galaxies are essential for this study, since the non-axisymmetric forces exerted by the bar affect the dynamics of the gas and of the dark matter, enabling much more information to be extracted than is possible from nearly axisymmetric systems. The research includes analysis of new integral-field velocity maps for a range of morphological types of barred galaxy, to be made with the Southern African Large Telescope, and new theoretical work on dynamical friction in barred galaxies. This will sharpen the confrontation between theory and observation.The work includes front-line research experiences for students, both in the US and in South Africa, and including under-represented groups.

AST-0507323Sellwood兰姆达冷暗物质(LCDM)模型目前在解释宇宙大尺度结构的大部分方面取得了巨大成功，尽管它在较小尺度上仍面临困难。该项目将解决目前阻碍将观测到的星系晕性质与LCDM的预测进行直接比较的许多问题。棒状星系对这项研究至关重要，因为棒状星系施加的非轴对称力会影响气体和暗物质的动力学，使得能够提取的信息比从近轴对称系统中可能提取的信息多得多。这项研究包括利用南部非洲大望远镜对一系列形态类型的条状星系进行新的积分场速度图分析，以及关于条状星系中动力摩擦的新理论工作。这将加剧理论和观察之间的对抗。这项工作包括为美国和南非的学生提供一线研究经验，包括代表性不足的群体。