CAREER: Combining HI and Optical Galaxy Surveys: A Census of Baryons in the Local Universe

职业：结合 HI 和光学星系巡天：本地宇宙中重子的普查

• 批准号: 0847409
• 负责人: Jessica Rosenberg
• 金额: $ 86.92万
• 依托单位: George Mason University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-09-01 至 2014-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0847409&HistoricalAwards=false
• 关键词: CAREER; Combining; HI; Optical; Galaxy

This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5).Dr. Jessica Rosenberg (George Mason University) will use two large overlapping surveys which probe the galaxy population at optical and 21-cm (HI) wavelengths to study the baryons in galaxies. The nature and distribution of the baryons in galaxies can test predictions of the Lambda-Cold Dark Matter (Lambda-CDM) model while also providing a probe of the astrophysical processes that affect the state of the baryons in galaxies. Ultimately, this project will address two of the most important questions in extragalactic astronomy and cosmology today: (1) is the Lambda-CDM model correct? and (2) how do the astrophysical processes governing star formation and galactic feedback affect the evolution of galaxies? This can be done because there are now large area surveys in both optical and radio (21-cm) wavelengths, so that studying the stars and gas simultaneously in a statistically significant sample of galaxies in a single volume of space is finally possible.This study will break new ground in our understanding of the fundamental components of galaxies in the local universe, and will have a legacy value to the entire astronomical community in the form of readily available catalogs containing the combined optical and HI data for more than 30,000 galaxies in the overlap region between the Arecibo Legacy Fast Arecibo L-band Feed Array (ALFALFA) survey and the Sloan Digital Sky Survey (SDSS). There will also be a longer term impact on the recruitment, training, and mentoring of the next generation of scientists and science teachers. In addition, Dr. Rosenberg will work to increase the number of women and minority physics majors at George Mason University as one of the goals of this project.

该奖项是根据2009年美国复苏和再投资法案（公法111-5）资助的。杰西卡·罗森伯格博士（乔治梅森大学）将使用两个大型重叠的调查，在光学和21厘米（HI）波长探测星系人口，研究星系中的重子。星系中重子的性质和分布可以检验λ冷暗物质（Lambda-CDM）模型的预测，同时也提供了一个探测影响星系中重子状态的天体物理过程。 最终，这个项目将解决当今河外天文学和宇宙学中两个最重要的问题：（1）Lambda CDM模型正确吗？（2）控制星星形成和星系反馈的天体物理过程是如何影响星系演化的？ 这是可以做到的，因为现在有大面积的调查，在光学和无线电（21厘米）波长，使研究的恒星和气体同时在一个单一的空间体积的星系统计显着的样本终于有可能。这项研究将打破新的地面，我们的理解的基本组成部分星系在当地的宇宙，并将对整个天文学界具有遗产价值，其形式是随时可用的目录，其中包含超过30年的组合光学和HI数据，在阿雷西博遗产快速阿雷西博L波段馈源阵列（ALCARFA）调查和斯隆数字巡天（SDSS）之间的重叠区域中，有2000个星系。 这也将对下一代科学家和科学教师的招聘、培训和指导产生长期影响。 此外，罗森伯格博士还将致力于增加乔治梅森大学女性和少数族裔物理专业的人数，作为该项目的目标之一。