Collaborative Research: A Panchromatic View of Normal Galaxies in the Early Universe

合作研究：早期宇宙中正常星系的全色视图

• 批准号: 2107990
• 负责人: Regina Jorgenson
• 金额: $ 19.68万
• 依托单位: Nantucket Maria Mitchell Association
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-09-01 至 2024-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2107990&HistoricalAwards=false
• 关键词: Collaborative; Research; Panchromatic; View; Normal

A tool to identify “normal” galaxies at high redshifts (large distances), not biased by their brightness, is the presence of Damped Lyman-alpha systems (DLAs) in spectra of background light sources. Studying DLAs is essential to further our understanding of galaxy evolution in the early Universe, but little is known about the galaxies associated with DLAs and the relation between them and those identified by other methods. This project will use the Atacama Large Millimeter Array (ALMA) to directly image DLA galaxies and aims to answer fundamental questions of galaxy formation. The project will also include a “Bridge” program (post-bachelors degree/pre-graduate school) to attract and retain talented students from traditionally underrepresented groups, with a goal of increasing their participation in STEM fields. The team has leveraged the power of ALMA to directly image HI-selected galaxies identified by DLAs. This project aims to answer fundamental questions of galaxy formation including: What are the luminosities, star formation rates, gas masses, and stellar masses of normal galaxies at high redshifts? What is the incidence of rotating disks and mergers? Do absorption-selection and emission-selection yield the same population of galaxies? The project also leverages the JVLA, NOEMA, VLT, GTC, and Keck observatories to dissect the galaxy population from the far-UV to radio wavelengths, accessing ionized gas, neutral gas, stellar, and dust diagnostics. The Maria Mitchell Observatory (MMO) Bridge program will provide students the opportunity to improve their hands-on research skills, gain first-hand knowledge of graduate-level research, and prepare for entrance into STEM graduate programs. The postdoctoral researcher at Johns Hopkins University will work directly with the MMO Bridge students, gaining valuable mentoring experience.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.

一种在高红移（大距离）上识别“正常”星系的工具，而不是亮度偏向于亮度，是背景光源光谱中的阻尼Lyman-Alpha系统（DLAS）的存在。研究DLA对于进一步了解早期宇宙中的星系演变至关重要，但是对与DLA相关的星系及其之间的关系以及其他方法所确定的关系知之甚少。该项目将使用Atacama大毫米阵列（ALMA）直接对DLA星系进行映像，并旨在回答星系形成的基本问题。该项目还将包括一个“桥梁”计划（学士后学位/学前院），以吸引和保留传统上代表性不足的团体的才华横溢的学生，以增加他们参与STEM领域的目标。该团队利用ALMA的力量直接成像DLAS确定的Hi-Selected星系。该项目旨在回答星系形成的基本问题，包括：在高红移时有哪些亮度，恒星形成率，气体质量和正常星系的恒星质量？旋转磁盘和合并的事件是什么？抽象选择和排放选择会产生相同的星系群吗？该项目还利用JVLA，NOEMA，VLT，GTC和KECK观察结果将星系人群从远处剖析到无线电波长，从而获得电离气体，中性气体，恒星和尘埃诊断。玛丽亚·米切尔（Maria Mitchell）天文台（MMO）桥梁计划将为学生提供提高动手研究技能的机会，获得研究生水平研究的第一手知识，并为进入STEM研究生课程的进入做准备。约翰·霍普金斯大学（Johns Hopkins University）的博士后研究员将直接与MMO Bridge学生合作，获得价值的心理经验。该奖项反映了NSF的法定任务，并通过使用基金会的知识分子和更广泛的影响评估审查标准来通过评估来诚实地获得支持。

项目成果

A Massive, Dusty, Hi Absorption–Selected Galaxy at z ≈ 2.46 Identified in a CO Emission Survey

CO 排放调查中发现的一个巨大、布满灰尘、高吸收率的星系，位于 z ≤ 2.46

• DOI: 10.3847/1538-4357/ac7b2c
• 发表时间: 2022
• 期刊: The Astrophysical Journal
• 作者: Kaur, B.;Kanekar, N.;Revalski, M.;Rafelski, M.;Neeleman, M.;Prochaska, J. X.;Walter, F.
• 通讯作者: Walter, F.

Jansky Very Large Array Detections of CO(1–0) Emission in H i-absorption-selected Galaxies at z ≳ 2

Jansky 甚大阵列对 z ≤ 2 处 H i 吸收选择星系中 CO(1-0) 发射的探测

• DOI: 10.3847/2041-8213/ac7bdd
• 发表时间: 2022
• 期刊: The Astrophysical Journal Letters
• 作者: Kaur, B.;Kanekar, N.;Rafelski, M.;Neeleman, M.;Prochaska, J. X.;Revalski, M.
• 通讯作者: Revalski, M.