Simulations of Early Galaxy Formation

早期星系形成的模拟

• 批准号: 0907998
• 负责人: Romeel Dave
• 金额: $ 31.5万
• 依托单位: University of Arizona
• 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: 2009-08-15 至 2013-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0907998&HistoricalAwards=false
• 关键词: Simulations; Early; Galaxy; Formation

This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5).Dr Dave and his team will use computer simulations to follow the formation of galaxies through the period 1-2 billion years after the Big Bang, when the cosmic gas was reionized by ultraviolet light from newly-formed stars and the active nuclei of galaxies. He and his team will combine an existing code that computes the motion of dark matter and gas with their recently-developed radiative transfer code. They will include a treatment of cooling below 10,000K, and implement adaptive mesh refinement for the radiative transfer calculation. The effect of star formation on the surrounding gas is calculated with a momentum-driven wind model that is tuned to match the evolution of galaxies and the gas around them at more recent times. The team will produce catalogs of simulated observations of newly-forming galaxies and the intergalactic gas. These will be made available to the community for planning observations with the next generation of ground- and space-based telescopes.A graduate student will be trained by participating in the research. Dr Dave will develop a course for non-astronomy majors on the use of astronomical data archives. This will be presented first as part of a U. Arizona Study Abroad program based at the University of Cape Coast in Ghana, which he is helping to organize. The budget includes travel grants for US students, selected on the basis of minority status and academic record. Students from the University of Cape Coast will also attend.

该奖项是根据2009年美国复苏和再投资法案（公法111-5）资助的。戴夫博士和他的团队将使用计算机模拟来跟踪大爆炸后10 - 20亿年的星系形成，当时宇宙气体被新形成的恒星和活跃的星系核的紫外线重新电离。 他和他的团队将联合收割机结合现有的代码，计算暗物质和气体的运动与他们最近开发的辐射转移代码。 它们将包括低于10，000 K的冷却处理，并为辐射传输计算实现自适应网格细化。 星星形成对周围气体的影响是用动量驱动的风模型计算的，该模型经过调整以匹配星系及其周围气体在更近时期的演化。该团队将制作新形成星系和星系际气体的模拟观测目录。 这些将提供给社区，用于规划下一代地面和空间望远镜的观测。一名研究生将通过参与研究进行培训。戴夫博士将为非天文学专业的学生开发一门关于天文数据档案使用的课程。 这将首先作为一个美国的一部分。亚利桑那州留学计划在加纳海岸角大学，他正在帮助组织。 预算包括根据少数民族身份和学业成绩选择的美国学生的旅费赠款。 海岸角大学的学生也将参加。