A Comprehensive Spectroscopic Study of Gravitationally Lensed Dwarf Galaxies at the Peak Epoch of Star Formation

恒星形成高峰时期引力透镜矮星系的综合光谱研究

基本信息

批准号：
1617013
负责人：
Brian Siana
金额：
$ 37.2万
依托单位：
University of California-Riverside
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
2016
资助国家：
美国
起止时间：
2016-07-15 至 2021-09-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1617013&HistoricalAwards=false
关键词：
Comprehensive Spectroscopic Study Gravitationally Lensed

项目摘要

The team will study the most distant dwarf galaxies known to astronomers. The dwarf galaxies are located behind clusters of galaxies. Gravitational lensing by the foreground clusters boosts the signals from the distant dwarf galaxies. This trick lets the team observe the otherwise-invisible dwarf galaxies. Observations from the ground and space will show how the dwarf galaxies form their stars and affect their environments. Senior team members will train junior team members. The team will engage with underrepresented students in local high schools, notably those of the Riverside County Juvenile Halls. The team will also develop online materials for teacher training.The team will investigate dwarf galaxies at z ~ 1.5-3.6. Their goals are to (1) conduct ground-based spectroscopy at optical and near-infrared wavelengths of 200 dwarf galaxies lensed by galaxy clusters; (2) combine those measurements with existing space-based measurements; and (3) examine the Lyman continuum escape fractions, the dust extinction, the gas outflows, the metallicities, and the "burstiness" of the star formation.

该团队将研究天文学家已知的最遥远的矮人星系。矮星系位于星系簇后面。前景簇的重力镜头增强了遥远矮星系的信号。这个技巧使团队可以观察到原本可见的矮星系。地面和空间的观察结果将显示矮星系如何形成其恒星并影响其环境。高级团队成员将培训初级团队成员。该团队将与当地高中的代表性不足的学生互动，尤其是河滨县少年大厅的学生。该团队还将开发在线材料进行教师培训。团队将以Z〜1.5-3.6进行调查矮星系。他们的目标是（1）在光学和近红外波长中进行地面光谱，该波长由星系簇镜头的200矮星星系进行；（2）将这些测量与现有的空间测量相结合；（3）检查Lyman连续逃脱部分，灰尘灭绝，气体流出，金属性和恒星形成的“爆发”。