Galaxies and the Intergalactic Medium at z=1.5-3.5

z=1.5-3.5 处的星系和星际介质

• 批准号: 0307263
• 负责人: Charles Steidel
• 金额: $ 48.16万
• 依托单位: California Institute of Technology
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-07-15 至 2007-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0307263&HistoricalAwards=false
• 关键词: Galaxies; Intergalactic; Medium; z=1.5; 3.5

AST-0307263SteidelThis project comprises several related observational programs to study the nature, large-scale distribution, and evolution of galaxies and of the diffuse intergalactic medium, and the relationship between the two, over the redshift range from 1.5 to 3.5, where new observational techniques and facilities are providing the first wholesale access to this almost unexplored era. The intent is to compile as complete as possible a picture of the baryonic universe during the most important era for galaxy and black hole growth. Using complementary galaxy surveys and high quality quasar absorption line spectroscopy will reveal the interactions between star-forming galaxies and intergalactic gas, and enable a study of the environment dependence of absorption systems, AGN activity, and galaxy formation and evolution. All sources of the ionizing photons that dictate the properties of the diffuse intergalactic medium will be detected and quantified. Deep optical and near-infrared spectroscopy will establish physical conditions and trends amongst the galaxy population. Some of the observed fields will be supplemented by unique information on the intergalactic medium in the same cosmic volumes, using multiple quasar lines of sight. In other fields, publicly available multi-wavelength and space-based data will be combined with the new observations to study the connection between galaxies and active galactic nuclei.The fundamental statistical information on early galaxies and the intergalactic medium obtained by this project will be useful to researchers in many sub-fields of astronomy, and all of the results and data will be made available to the community. An interest in the history of the Universe comes naturally to most people and can spark discussion between scientists and even the most science-phobic lay person. The PI's recent MacArthur fellowship provides an unusual opportunity to reach a larger audience through the resultant increased visibility, and there should be many chances to communicate the excitement of science and the scientific enterprise to nonscientists.

AST-0307263 Steidel这个项目包括几个相关的观测计划，以研究星系和弥散星系际介质的性质，大尺度分布和演化，以及两者之间的关系，在红移范围从1.5到3.5，其中新的观测技术和设施提供了第一批进入这个几乎未被探索的时代。 其目的是尽可能完整地汇编星系和黑洞生长最重要时期的重子宇宙图像。 利用互补星系巡天和高质量的类星体吸收线光谱，将揭示恒星形成星系和星系际气体之间的相互作用，并使研究吸收系统的环境依赖性，活动星系核活动，星系的形成和演化。 决定弥漫星系际介质性质的所有电离光子源都将被探测和量化。 深度光学和近红外光谱将确定星系群的物理条件和趋势。 一些观测场将利用多个类星体的视线，得到关于相同宇宙体积中星系际介质的独特信息的补充。 在其他领域，公开的多波长和空基数据将与新的观测相结合，研究星系与活动星系核之间的联系。该项目获得的早期星系和星系际介质的基本统计信息将对天文学许多子领域的研究人员有用，所有结果和数据都将向社区提供。 对宇宙历史的兴趣对大多数人来说是很自然的，可以引发科学家之间的讨论，甚至是最害怕科学的外行人。 PI最近的麦克阿瑟奖学金提供了一个不寻常的机会，通过由此增加的知名度接触到更多的观众，应该有很多机会向非科学家传达科学的兴奋和科学事业。