Collaborative Research: The Heavy Metal Survey: Stellar Metallicities and Chemical Abundance Patterns of Massive Galaxies out to z~2.3

合作研究：重金属巡天：z~2.3 大质量星系的恒星金属丰度和化学丰度模式

• 批准号: 1909942
• 负责人: Joshua Bloom
• 金额: $ 41.34万
• 依托单位: University of California-Berkeley
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2019
• 资助国家: 美国
• 起止时间: 2019-07-01 至 2024-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1909942&HistoricalAwards=false
• 关键词: Collaborative; Research; Heavy; Metal; Survey

As galaxies grow and age, their chemical composition changes as a result of their own star formation as well as the history of any mergers that they may have had with other galaxies. At large distances, previous studies only measured the chemical composition of galaxies that were actively forming stars. This project will take advantage of new instruments available on the Keck telescope to measure the chemical composition of quiescent galaxies, which are more common than star-forming galaxies out to the distances accessible by these instruments. This data will then be used to provide information about the histories of distant quiescent galaxies.The project will use the MOSFIRE and LRIS spectrographs on Keck to obtain a survey of the metallicities of 20 quiescent galaxies in a redshift range of 1.3-2.3. They have 16.5 nights scheduled on Keck for this survey. Upon completion of the analysis of the spectra, the team will use the chemical abundance patterns, structural parameters, and stellar abundance patterns from the survey data to constrain assembly histories and star formation histories of quiescent galaxies over cosmological timescales.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.

随着星系的增长和年龄的增长，它们的化学成分随着自己的恒星形成以及与其他星系可能发生的任何合并的历史而变化。在大远处，先前的研究仅测量了积极形成恒星的星系的化学组成。该项目将利用凯克望远镜上可用的新仪器来测量静态星系的化学成分，这比这些仪器可访问的距离的星系更为普遍。然后，该数据将用于提供有关遥远星系史的历史的信息。该项目将使用Keck上的Mosfire和LRIS光谱仪，以获得1.3-2.3红移范围内20个静态星系的金属率的调查。他们计划在凯克（Keck）进行16.5夜进行这项调查。在完成光谱分析后，团队将使用调查数据中的化学丰度模式，结构参数和恒星丰度模式来限制静态星系的组装历史和恒星形成的历史，而不是宇宙学时尺度。这一奖项反映了NSF的法定任务，反映了通过评估的范围来弥补的构成师的依据。

项目成果

From Carbon to Cobalt: Chemical Compositions and Ages of z ∼ 0.7 Quiescent Galaxies

• DOI: 10.3847/1538-4357/acc176
• 发表时间: 2023-03
• 期刊: The Astrophysical Journal
• 作者: Aliza G. Beverage;M. Kriek;C. Conroy;N. Sandford;R. Bezanson;M. Franx;A. van der Wel;D. Weisz

Elemental Abundances and Ages of z ∼ 0.7 Quiescent Galaxies on the Mass–Size Plane: Implication for Chemical Enrichment and Star Formation Quenching

• DOI: 10.3847/2041-8213/ac12cd
• 发表时间: 2021-05
• 期刊: The Astrophysical Journal Letters
• 作者: Aliza G. Beverage;M. Kriek;C. Conroy;R. Bezanson;M. Franx;A. van der Wel