Leveraging the Hobby Eberly Telescope Dark Energy Experiment to Understand Lyman-alpha Emission, Galaxy Evolution, and Reionization

利用 Hobby Eberly 望远镜暗能量实验来了解莱曼阿尔法发射、星系演化和再电离

• 批准号: 1908817
• 负责人: Steven Finkelstein
• 金额: $ 45.91万
• 依托单位: University of Texas at Austin
• 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: 2019-08-01 至 2024-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1908817&HistoricalAwards=false
• 关键词: Leveraging; Hobby; Eberly; Telescope; Dark

Observations have shown that the physical conditions in distant galaxy interstellar media (ISM) are changing, but the physical cause remains unknown. This project uses a soon-to-exist spectroscopic sample of galaxies showing Lyman alpha emission, which is an excellent probe of ISM geometry and kinematics, to measure the detailed physical properties of the ISM in these galaxies. It will also measure the contribution of Lyman alpha emitting galaxies (LAEs) to star formation. These results are critical to understanding the epoch of reionization. The project integrates research with education by involving ten or more UT Austin students per year in research related to the source of the data, the Hobby Eberly Telescope Dark Energy Experiment (HETDEX). It also impacts secondary school students nationwide through two residential teacher workshops at McDonald Observatory, and reaches millions by creating one StarDate Radio show each year.The work will constrain the physical mechanisms which promote the escape of Lyman alpha emission from galaxies during the peak epoch of cosmic star formation. Data for the first 300,000 spectroscopically confirmed LAEs from HETDEX will be combined with new extensive multi-wavelength imaging to i) measure the detailed evolution of the Lyman alpha luminosity function; ii) understand the physical properties which promote Lyman alpha escape; iii) measure the star-formation rate density contributed by LAEs; and iv) calculate the faint-end slope of the ultraviolet luminosity function for active galactic nuclei (AGN) to distinguish evolutionary trends and evaluate AGN contributions to reionization. Stellar population modeling of detailed physical properties will measure the evolution of the global escape of Lyman alpha emission, and the physical causes behind this evolution, and provide key data to constrain theoretical models.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.

观察结果表明，遥远的星际媒介（ISM）的物理条件正在发生变化，但物理原因仍然未知。 该项目使用即将存在的星系光谱样品，显示Lyman Alpha发射，这是ISM几何学和运动学的出色探针，以测量这些星系中ISM的详细物理特性。 它还将衡量Lyman Alpha排放星系（LAES）对星形组的贡献。 这些结果对于理解电离时代至关重要。 该项目通过每年参与与数据来源有关的研究（Hobby eberly eberly theescope Dark Energy实验（HETDEX））进行研究，将研究与教育融为一体。 它还通过麦当劳天文台的两个住宅教师研讨会影响全国的中学学生，并通过每年创建一个星脉广播节目来达到数百万美元。这项工作将限制物理机制，从而促进Lyman Alpha逃脱宇宙之星峰值期间的Lyman Alpha从星系中逃脱的逃脱。 HETDEX的前300,000个光谱镜确认的LAE的数据将与新的广泛多波长成像结合到i）测量Lyman Alpha光度函数的详细演变； ii）了解促进Lyman Alpha逃脱的物理特性； iii）测量LAE贡献的恒星形成速率密度；和iv）计算活性银河核（AGN）紫外线光度函数的微弱斜率，以区分进化趋势并评估AGN对电离的贡献。 详细的物理特性的恒星种群建模将衡量Lyman Alpha排放的全球逃脱的演变，以及这种演变背后的物理原因，并提供了关键数据来限制理论模型。该奖项反映了NSF的法定任务，并被认为是通过该基金会的知识分子和更广泛的影响来评估Criteria通过评估的支持。

项目成果

Identifying Active Galactic Nuclei at z ∼ 3 from the HETDEX Survey Using Machine Learning

使用机器学习从 HETDEX 巡天中识别 z ≤ 3 处的活动星系核

• DOI: 10.3847/1538-3881/acba92
• 发表时间: 2023
• 期刊: The Astronomical Journal
• 作者: Tardugno Poleo, Valentina;Finkelstein, Steven L.;Leung, Gene;Mentuch Cooper, Erin;Gebhardt, Karl;Farrow, Daniel J.;Gawiser, Eric;Zeimann, Greg;Schneider, Donald P.;Morabito, Leah
• 通讯作者: Morabito, Leah

The Active Galactic Nuclei in the Hobby–Eberly Telescope Dark Energy Experiment Survey (HETDEX). I. Sample Selection

• DOI: 10.3847/1538-4365/ac6ba6
• 发表时间: 2022-04
• 期刊: The Astrophysical Journal Supplement Series
• 作者: Chenxu Liu;K. Gebhardt;E. Cooper;D. Davis;D. Schneider;R. Ciardullo;D. Farrow;S. Finkelstein;C. Gronwall;Yucheng Guo;G. Hill;Lindsay R. House;D. Jeong;S. Jogee;W. Kollatschny;M. Krumpe;M. Landriau;Óscar A. Chávez Ortiz;Yechi Zhang

Introducing the Texas Euclid Survey for Lyα (TESLA) Survey: Initial Study Correlating Galaxy Properties to Lyα Emission

德克萨斯欧几里得 Lyα 巡天 (TESLA) 巡天简介：将星系特性与 Lyα 发射相关联的初步研究

• DOI: 10.3847/1538-4357/acc403
• 发表时间: 2023
• 期刊: The Astrophysical Journal
• 作者: Chávez Ortiz, Óscar A.;Finkelstein, Steven L.;Davis, Dustin;Leung, Gene;Mentuch Cooper, Erin;Bagley, Micaela;Larson, Rebecca;Casey, Caitlin M.;McCarron, Adam P.;Gebhardt, Karl
• 通讯作者: Gebhardt, Karl

On the Coevolution of the AGN and Star-forming Galaxy Ultraviolet Luminosity Functions at 3 < z < 9

活动星系核与恒星形成星系紫外光度函数在 3 < z < 9 时的协同演化

• DOI: 10.3847/1538-4357/ac89eb
• 发表时间: 2022
• 期刊: The Astrophysical Journal
• 作者: Finkelstein, Steven L.;Bagley, Micaela B.
• 通讯作者: Bagley, Micaela B.

Using Dark Energy Explorers and Machine Learning to Enhance the Hobby–Eberly Telescope Dark Energy Experiment

• DOI: 10.3847/1538-4357/accdd0
• 发表时间: 2023-04
• 期刊: The Astrophysical Journal
• 作者: Lindsay R. House;K. Gebhardt;K. Finkelstein;E. Cooper;D. Davis;R. Ciardullo;D. Farrow;S. Finkelstein;C. Gronwall;D. Jeong;L. Johnson;Chenxu Liu;B. Thomas;G. Zeimann