Quasar Absorption Lines: Probing Galactic Gas at Redshifts One to Two

类星体吸收线：探测红移一到二的星系气体

• 批准号: 0407138
• 负责人: Jane Charlton
• 金额: --
• 依托单位: Pennsylvania State Univ University Park
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-08-01 至 2009-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0407138&HistoricalAwards=false
• 关键词: Quasar; Absorption; Lines; Probing; Galactic

AST-0407138CharltonThis project will explore the evolution of galaxies during the intermediate epoch of the history of the universe, an important time when star formation is near its peak level and significant evolution in the ionizing radiation field is happening. The probe of this era is quasar absorption lines, which provide detailed information about kinematics, chemical content, and ionization conditions of the multiple phases of gas in and around galaxies. Much of the data and all of the tools are already in hand, so that analysis will begin immediately. Themes of this study include the evolution of galaxy coronae, of the high velocity cloud population, of the interstellar medium of galaxies, and of absorption produced by superwinds. Over half of the systems to be studied are small single-cloud, weak absorbers, a rather mysterious but abundant population.The research will continue to involve students, including as authors on resultant publications (a significant prior strength of this team). This project also supports continued ambitious astronomy outreach at Pennsylvania State University. Reaching over 10,000 K-12 students, adults and educators each year, these activities culminate in the Astrofest, a four-night summer festival of astronomy conceived by undergraduates and sustained by more than 50 faculty and student volunteers.

AST-0407138 Charltonthis项目将探索宇宙历史中间时期星系的演变，这是恒星形成接近其峰水平并在电离辐射场中发生显着演变的重要时期。 这个时代的探测是类星体吸收系，它提供了有关星系内和周围气体多个阶段的运动学，化学含量和电离条件的详细信息。 许多数据和所有工具已经在手中，因此分析将立即开始。 这项研究的主题包括星系冠，高速云种群的演化，星系星介质以及超级风的吸收。 要研究的系统中，超过一半的系统是小型单云，吸收商薄弱，一个相当神秘但丰富的人群。研究将继续吸引学生，包括作为结果出版物的作者（该团队的重要优势）。 该项目还支持宾夕法尼亚州立大学持续雄心勃勃的天文​​学外展。 每年，这些活动都达到了超过10,000名K-12学生，成人和教育工作者，在Astrofest中达到顶峰，这是一个四晚的夏季天文学，由本科生构想，并由50多名教职员工和学生志愿者维持。