Probing the Galaxy-Halo/Cosmic Web Interface and Galaxy Evolution

探索 Galaxy-Halo/Cosmic Web 界面和 Galaxy Evolution

• 批准号: 0708210
• 负责人: Christopher Churchill
• 金额: $ 28.57万
• 依托单位: New Mexico State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-09-15 至 2011-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0708210&HistoricalAwards=false
• 关键词: Probing; Galaxy; Halo; Cosmic; Web

AST-0708210ChurchillThis project is a detailed study of the dynamic gaseous regions surrounding galaxies, in order to examine the combined role of intergalactic medium evolution and feedback from galaxies. Extended gaseous halos are the chemically enriched, multi-ionization phase, astrophysical laboratories harboring the physics of galaxy evolution, but existing simulations have known shortcomings, and there is a shortage of high quality data. Two complementary projects will (1) provide unprecedented detailed observational constraints on the extent, distribution, kinematics, and chemical and ionization conditions, of galactic halo gas, and (2) undertake an analysis of high-resolution simulations, both to interpret these data and to place constraints on various galaxy feedback recipes. The work will accumulate and analyze the highest quality quasar spectra and galaxy data from space and ground archives, as well as obtain additional critical data. Analysis of the simulations will create synthetic quasar absorption line spectroscopy to analyze in the same fashion as the observational data. Analysis of mock quasar spectra through cosmological simulation is a highly promising way to interpret the underlying temperature, density, and ionization structure of the halo/cosmic web interface, and the influence of galaxies on chemical enrichment.The project includes an innovative state-wide networked science course designed to encourage under-represented students from the state of New Mexico to pursue technical careers. The class will motivate students to cross cultural barriers and encourage cultural diversity in the growing space flight industry.

这个项目是对星系周围动态气体区域的详细研究，目的是检验星系间介质演化和星系反馈的综合作用。扩展的气体晕是化学富集的多电离相，天体物理实验室拥有星系演化的物理学，但现有的模拟存在已知的缺点，并且缺乏高质量的数据。两个互补项目将(1)对星系晕气体的范围、分布、运动学、化学和电离条件提供前所未有的详细观测约束；(2)进行高分辨率模拟分析，既解释这些数据，又对各种星系反馈配方施加约束。这项工作将从太空和地面档案中积累和分析最高质量的类星体光谱和星系数据，并获得额外的关键数据。对模拟的分析将产生合成类星体吸收谱，以与观测数据相同的方式进行分析。通过宇宙学模拟来分析模拟类星体光谱是一种非常有前途的方法，可以解释晕/宇宙网界面的潜在温度、密度和电离结构，以及星系对化学富集的影响。该项目包括一个创新的全州网络科学课程，旨在鼓励来自新墨西哥州的代表性不足的学生追求技术职业。该课程将激励学生跨越文化障碍，并鼓励不断发展的航天工业中的文化多样性。