New Models of the Cosmic Dawn

宇宙黎明的新模型

基本信息

批准号：
1812458
负责人：
Steven Furlanetto
金额：
$ 31.87万
依托单位：
University of California-Los Angeles
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2018
资助国家：
美国
起止时间：
2018-09-01 至 2023-08-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1812458&HistoricalAwards=false
关键词：
New Models Cosmic Dawn

项目摘要

The Cosmic Dawn, when stars first illuminated the Universe, is one of the most exciting frontiers in astronomy. These first generations of luminous objects likely differed significantly from nearby galaxies. While their vast distance from us has so far prevented telescopes from observing them, new facilities are now under construction that hope to probe these first generations of objects in the next several years. This project will develop and publicly release a new theoretical model of these objects, which will link many of their newly observable properties in a coherent framework amenable to modern statistical analyses. The PI will also develop a variety of online materials describing the fascinating astrophysics of this era to the public, including animations, tutorials, and a downloadable application based on some of his models.This project will advance our understanding of the Cosmic Dawn through several related efforts. First, the PI will develop a new set of "semi-analytic" galaxy formation models tuned to the earliest phases of normal galaxy formation in our Universe's history. The models will use physically motivated star formation and feedback prescriptions to explore the wide range of astrophysics that may be relevant during this era. Second, he will improve the treatment of photon absorption in fast simulations of the reionization era, which is essential to model that process accurately. Finally, he will connect these new theoretical models to a wide range of observables, including galaxy measurements and low-frequency radio investigations of the reionization process, using a parameter inference code.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

宇宙黎明，当恒星第一次照亮宇宙时，是天文学中最令人兴奋的前沿之一。这些第一代发光物体可能与附近的星系有很大不同。虽然迄今为止它们与我们相距遥远，望远镜无法观测到它们，但新的设施正在建设中，希望在未来几年内探测这些第一代物体。该项目将开发并公开发布这些物体的新理论模型，该模型将在一个适合现代统计分析的连贯框架中将许多新观察到的特性联系起来。 PI 还将开发各种在线材料，向公众描述这个时代令人着迷的天体物理学，包括动画、教程和基于他的一些模型的可下载应用程序。该项目将通过几个相关的内容增进我们对宇宙黎明的理解。努力。首先，PI 将开发一套新的“半解析”星系形成模型，以适应宇宙历史上正常星系形成的最早阶段。这些模型将使用物理驱动的恒星形成和反馈处方来探索这个时代可能相关的广泛天体物理学。其次，他将改进再电离时代快速模拟中光子吸收的处理，这对于准确模拟该过程至关重要。最后，他将使用参数推断代码将这些新的理论模型与广泛的可观测对象联系起来，包括星系测量和再电离过程的低频射电研究。该奖项反映了 NSF 的法定使命，并被认为值得通过以下方式获得支持：使用基金会的智力价值和更广泛的影响审查标准进行评估。

项目成果

期刊论文数量（18）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

The Relationship between IGM Lyα Opacity and Galaxy Density near the End of Reionization

再电离结束时 IGM Lyα 不透明度与星系密度之间的关系

DOI：
10.3847/1538-4357/acf450
发表时间：
2023-08-24
期刊：
The Astrophysical Journal
影响因子：
0
作者：
H. Christenson;G. Becker;Anson D’Aloisio;F. Davies;Yong Zhu;E. Boera;F. Nasir;S. Furlanetto;M. Malkan
通讯作者：
M. Malkan

Breaking degeneracies in the first galaxies with clustering

通过聚类打破第一批星系的简并性