Astrophysical and Cosmological Information Content in Anisotropies of the Near and Far-IR Background and Intensity Fluctuations of Atomic and Molecular Lines

近、远红外背景各向异性以及原子和分子谱线强度涨落的天体物理和宇宙学信息内容

• 批准号: 1313319
• 负责人: Asantha Cooray
• 金额: $ 30.4万
• 依托单位: University of California-Irvine
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-09-01 至 2017-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1313319&HistoricalAwards=false
• 关键词: Astrophysical; Cosmological; Information; Content; Anisotropies

This award will support theoretical and data analysis studies to understand the spatial fluctuations of the unresolved cosmic near and far-infrared backgrounds and the intensity mapping of atomic and molecular lines. The infrared background at optical to near-IR wavelengths is the direct starlight emission from galaxies, while the far-infrared background is mainly due to reprocessed light by the intervening dust. The work will enable us to better understand intrahalo light, intrahalo dust and faint reionizing galaxies at redshifts greater than 6 through measurements involving anisotropies of the near and far-infrared backgrounds. The research team will (1) measure or improve the existing measurements, (2) interpret unresolved fluctuations seen in Spitzer, Hubble, and CIBER data, and (3) conduct a multiband study from 0.5 to 4.5 microns to measure the spectral energy distribution of the fluctuations. Understanding the high-redshift universe is one of the most pressing priorities in contemporary astronomy. This work has great significance because an improved understanding in our knowledge of the infrared background will have significant consequences for our knowledge of how galaxies form and evolve. The broader impacts of this work include an ongoing research program that involves undergraduate students. The research program and other topics in cosmology will also be integrated into a Computational Physics course at UC Irvine.

该奖项将支持理论和数据分析研究，以了解未分辨的宇宙近红外和远红外背景的空间涨落以及原子和分子谱线的强度图。在光学到近红外波段的红外背景是来自星系的直接星光发射，而远红外背景主要是由于中间尘埃对光的再处理。这项工作将使我们能够通过测量近红外和远红外背景的各向异性，更好地理解红移大于6的晕内光、晕内尘埃和微弱的电离星系。研究团队将(1)测量或改进现有测量，(2)解释斯皮策、哈勃和CIBER数据中出现的未分辨波动，以及(3)进行0.5至4.5微米的多波段研究，以测量波动的光谱能量分布。理解高红移宇宙是当代天文学最紧迫的优先事项之一。这项工作具有重大意义，因为我们对红外背景知识的了解的提高将对我们了解星系的形成和演化产生重大影响。这项工作的更广泛影响包括一个正在进行的涉及本科生的研究项目。宇宙学的研究计划和其他主题也将被整合到加州大学欧文分校的计算物理课程中。