Lyman Limit Systems: Probing the Protogalactic/IGM Interface

莱曼极限系统：探测原星系/IGM 界面

• 批准号: 0307408
• 负责人: Jason Prochaska
• 金额: $ 25.69万
• 依托单位: University of California-Santa Cruz
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-09-01 至 2007-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0307408&HistoricalAwards=false
• 关键词: Lyman; Limit; Systems; Probing; Protogalactic

AST-0307408ProchaskaThis project will create a homogeneous, public data set of echelle spectrograph observations of about a hundred Lyman limit systems (LLS), which are the most poorly understood of the major classes of quasar absorption-line systems. This survey of LLS will take advantage of recent instrumentation advances at the Keck and Las Campanas Observatories, and will provide new insight into gas accretion in proto-galactic halos, galactic winds, ionization edges in galactic disks, chemical enrichment, the interface between proto-galaxies and the intergalactic medium, radiative transfer, galactic feedback, and all aspects of galaxy formation in the early Universe. The sample to be observed will be drawn from several well-defined quasar surveys, but new high-resolution data are needed to determine accurate characteristics of LLS. This program will synthesize the talents of observer, experimentalist, and theorist to reach an understanding of the remarkable physical properties of LLS, but there will be additional significant scientific impact on studies of other quasar absorption-line systems, of gas at high redshift, and of structures in the early Universe.The results will be spread to the community in the usual ways, but in addition, a dedicated Web site will reach beyond the astronomical population to provide high school tutorials and lab assignments, undergraduate introductions, and graduate level examples of the quantitative analysis of LLS.

AST-0307408-Prochaskathis项目将创建一个大约一百个Lyman限制系统（LLS）的Echelle光谱仪观测值的均质公共数据集，这是主要类Quasar吸收线系统中最糟糕的理解。 这项对LLS的调查将利用凯克和Las Campanas观测值的最新仪器进步，并将为原型 - 半乳酸光环，银河风，银河系磁盘的电离边缘，化学丰富，化学丰富的电离边缘的新见解提供新的见解。宇宙。 要观察到的样本将从定义明确的类星体调查中得出，但是需要新的高分辨率数据来确定LLS的准确特征。 该计划将综合观察者，实验主义者和理论家的才能，以了解LLS的显着物理特性，但是对其他类星体吸收线系统，高redshift气体的研究，高redshift的气体的研究将有更大的显着科学影响，以及早期的宇宙中的结构。 LLS定量分析的教程和实验室分配，本科介绍以及研究生级别的例子。