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-0407138Charlton该项目将探索宇宙历史中间时期星系的演化，这是恒星形成接近其峰值水平并且电离辐射场正在发生重大演化的重要时期。 这个时代的探测器是类星体吸收线，它提供了有关星系内部和周围气体多相的运动学、化学含量和电离条件的详细信息。 大部分数据和所有工具都已经在手，因此分析将立即开始。 这项研究的主题包括星系日冕、高速云群、星系星际介质以及超级风产生的吸收的演化。 超过一半的待研究系统是小型单云、弱吸收体、相当神秘但丰富的群体。这项研究将继续让学生参与，包括作为结果出版物的作者（该团队的重要先前优势）。 该项目还支持宾夕法尼亚州立大学继续雄心勃勃的天文​​学推广活动。 每年有超过 10,000 名 K-12 学生、成人和教育工作者参与，这些活动在 Astrofest 中达到高潮，这是一个由本科生构思并由 50 多名教职员工和学生志愿者维持的为期四晚的夏季天文学节。