Interstellar Astrophysics of the Intergalactic Medium

星际介质的星际天体物理学

• 批准号: 0707474
• 负责人: J. Michael Shull
• 金额: $ 54.68万
• 依托单位: University of Colorado at Boulder
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-09-15 至 2012-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0707474&HistoricalAwards=false
• 关键词: Interstellar; Astrophysics; Intergalactic; Medium

AST-0707474ShullThis project is a broad theoretical study of the fundamental astrophysical processes used to understand the formation of the first stars and galaxies, the production and distribution of heavy elements, and the physical state of the intergalactic medium at early times in the history of the Universe. Star formation, chemical history, ionization processes, transport of heavy elements, cooling and heating of the gas, formation and destruction of molecules, and the production and transport of ionizing radiation from the first stars and quasars, will all benefit from the developed modeling algorithms, which will be incorporated into publicly accessible numerical simulations. This research will help to understand the evolution of galaxies, stars, and gas in the high-redshift Universe, including current and future observations at optical, ultra-violet, infrared, and sub-millimeter wavelengths.The principal investigator (PI) and his team members will continue their long record of giving numerous educational and public presentations of research and general-interest astronomy. The PI has sponsored high school students in summer projects, and expects to continue doing so. He is also active in graduate and postdoctoral training, and national and professional service organizations. Previous research by this group has promoted several general tools, including new simulation codes and the application of atomic and molecular physics to interstellar and intergalactic studies, as well as to spectrum formation codes.

AST-0707474Shull 该项目是对基本天体物理过程的广泛理论研究，用于了解第一批恒星和星系的形成、重元素的产生和分布以及宇宙历史早期星系间介质的物理状态。 恒星的形成、化学历史、电离过程、重元素的传输、气体的冷却和加热、分子的形成和破坏，以及来自第一批恒星和类星体的电离辐射的产生和传输，都将受益于开发的建模算法，这些算法将被纳入公开的数值模拟中。 这项研究将有助于了解高红移宇宙中星系、恒星和气体的演化，包括当前和未来在光学、紫外线、红外线和亚毫米波长下的观测。首席研究员 (PI) 和他的团队成员将继续他们长期的记录，就研究和公众兴趣的天文学进行大量的教育和公开演讲。 PI 已经资助了高中生的暑期项目，并希望继续这样做。 他还积极参与研究生和博士后培训以及国家和专业服务组织。 该小组之前的研究推广了多种通用工具，包括新的模拟代码以及原子和分子物理在星际和星系间研究中的应用，以及光谱形成代码。