LADUMA: Reaching the Highest Redshifts with the Deepest HI Survey

LADUMA:通过最深入的 HI 调查达到最高的红移

基本信息

  • 批准号:
    2308161
  • 负责人:
  • 金额:
    $ 39.16万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Standard Grant
  • 财政年份:
    2023
  • 资助国家:
    美国
  • 起止时间:
    2023-09-01 至 2026-08-31
  • 项目状态:
    未结题

项目摘要

Since their formation in the early universe, galaxies have been converting their gas reservoirs - almost entirely composed of atomic (HI) and molecular hydrogen (H2) - into stars. Astronomers have formed an impressively detailed picture of this process, including the "hydrogen cycle" by which atomic and molecular gas transition from one form to the other and back again. The study of H2 in extremely distant (z 3) galaxies has been revolutionized by the Atacama Large Millimeter Array (ALMA), which takes advantage of highly luminous "tracer" molecules like carbon monoxide (CO). To probe the HI content of galaxies astronomers must rely on the much weaker 21 cm "spin-flip" transition of HI, which has effectively restricted studies to the local (z 0.2) universe. This project's goal is to extend this HI census in galaxies to the unprecedented redshift of z = 1.45 and fill a crucial gap in our current understanding of HI’s role in galaxy evolution through the Looking At the Distant Universe with the MeerKAT Array (LADUMA) survey. The project, jointly led by the PI, has been awarded 3,424-hours of high-priority time with the 64-element MeerKAT radio telescope in South Africa to image a single ultra-deep pointing in the Extended Chandra Deep Field South. Supporting observations will be used to allow HI "stacking" observations as well as discriminating HI from OH megamaser emission. All survey data will be publicly released. This project will allow continued U.S. leadership in Square Kilometer Array (SKA) precursor science. The award will also support the training of a graduate student in cutting-edge science as well as a new outreach program to community colleges in New Jersey. Results will be derived from both direct HI spectral line detections and by “stacking” samples of galaxies with previously measured positions and redshifts. The latter will allow LADUMA to achieve its full potential for studying HI out to z = 1.45, at least in a statistical sense. The project also encompasses the identification of OH megamaser “interlopers” in the HI sample that will be used to trace the cosmic history of gas-rich mergers out to z = 1.86. These research activities will benefit from detailed comparisons to theoretical models and are well-matched to the “cosmic ecosystems” theme of the recently released Astro2020 Decadal Survey on Astronomy and Astrophysics, including that theme’s priority science area (“unveiling the hidden drivers of galaxy growth”), a science question (“How do gas, metals, and dust flow into and out of galaxies?”), as well as a critical discovery area prioritized for galaxy evolution research (“mapping the circumgalactic medium and the intergalactic medium in emission”).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.
自从它们在早期宇宙中形成以来,星系一直在将它们的气藏——几乎完全由原子氢(HI)和分子氢(H2)组成——转化为恒星。天文学家已经对这一过程形成了令人印象深刻的详细图景,包括“氢循环”,原子和分子气体通过这种循环从一种形式转变为另一种形式,然后再转变回来。阿塔卡马大型毫米波阵列(ALMA)彻底改变了对极遥远(z 3)星系中H2的研究,它利用了像一氧化碳(CO)这样的高光“示踪”分子。为了探测星系的HI含量,天文学家必须依靠更弱的21厘米HI“自旋翻转”跃迁,这有效地限制了对局部(z 0.2)宇宙的研究。该项目的目标是将星系中的HI普查扩展到前所未有的红移z = 1.45,并通过使用MeerKAT阵列(LADUMA)调查来观察遥远的宇宙,填补我们目前对HI在星系演化中的作用的理解的关键空白。该项目由PI联合领导,已经与南非的64单元MeerKAT射电望远镜一起获得了3424小时的高优先级时间,以对扩展钱德拉深空南部的单个超深点进行成像。支持观测将用于允许HI“叠加”观测,以及区分HI和OH超激光发射。所有调查数据将公开发布。该项目将使美国在平方公里阵列(SKA)前体科学方面继续保持领导地位。该奖项还将支持一名尖端科学研究生的培训,以及一项针对新泽西州社区学院的新拓展计划。结果将来自直接的HI光谱线探测,以及通过“堆叠”先前测量位置和红移的星系样本。后者将允许LADUMA充分发挥其潜力,研究HI到z = 1.45,至少在统计意义上。该项目还包括在HI样本中识别OH超级激光“闯入者”,该样本将用于追踪z = 1.86的富含气体合并的宇宙历史。这些研究活动将受益于与理论模型的详细比较,并与最近发布的Astro2020天文学和天体物理学十年调查的“宇宙生态系统”主题非常匹配,包括该主题的优先科学领域(“揭示星系增长的隐藏驱动因素”),一个科学问题(“气体、金属和尘埃如何流入和流出星系?),以及优先用于星系演化研究的关键发现区域(“绘制星系周围介质和星系间介质的发射图”)。该奖项反映了美国国家科学基金会的法定使命,并通过使用基金会的知识价值和更广泛的影响审查标准进行评估,被认为值得支持。

项目成果

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Andrew Baker其他文献

The Reflective Online Searching Skills (ROSS) Environment: embedding information literacy into student learning through an online environment
反思性在线搜索技能(ROSS)环境:通过在线环境将信息素养融入学生学习中
  • DOI:
  • 发表时间:
    2008
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Helen Partridge;Sylvia Lauretta Edwards;Andrew Baker;Lynn M. McAllister
  • 通讯作者:
    Lynn M. McAllister
Investigating the immediate and long-term effects of job stressors on frontline service employees
调查工作压力源对一线服务员工的直接和长期影响
  • DOI:
  • 发表时间:
    2011
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Anita Whiting;Naveen Donthu;Andrew Baker
  • 通讯作者:
    Andrew Baker
Primary intraosseous squamous cell carcinoma: A rare malignancy of the mandible
  • DOI:
    10.1016/j.adoms.2021.100063
  • 发表时间:
    2021-04-01
  • 期刊:
  • 影响因子:
  • 作者:
    Aya AL-Harbawee;Manish Mair;Kartic Rajaram;Andrew Baker;Phil Da Forno
  • 通讯作者:
    Phil Da Forno
MANGANESE-ENHANCED T1MAPPING FOR THE DETECTION OF VIABLE AND STUNNED MYOCARDIUM FOLLOWING MYOCARDIAL INFARCTION
  • DOI:
    10.1016/s0735-1097(20)32194-x
  • 发表时间:
    2020-03-24
  • 期刊:
  • 影响因子:
  • 作者:
    Nick Spath;Nick Spath;Giorgos Papanastasiou;Trisha Singh;Andrew Baker;Rob Janiczek;Gerry McCann;Marc Dweck;David E. Newby;Scott Semple
  • 通讯作者:
    Scott Semple
Quality of life measures in older adults after traumatic brain injury: a systematic review
  • DOI:
    10.1007/s11136-019-02297-4
  • 发表时间:
    2019-09-14
  • 期刊:
  • 影响因子:
    2.700
  • 作者:
    Cindy Hunt;Shatabdy Zahid;Naomi Ennis;Alicja Michalak;Cheryl Masanic;Chantal Vaidyanath;Shree Bhalerao;Michael D. Cusimano;Andrew Baker
  • 通讯作者:
    Andrew Baker

Andrew Baker的其他文献

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{{ truncateString('Andrew Baker', 18)}}的其他基金

Activation of long non-coding RNA by a gene therapy CRISPR/Cas9 approach to prevent vein graft failure
通过基因治疗 CRISPR/Cas9 方法激活长非编码 RNA 以预防静脉移植失败
  • 批准号:
    EP/X024563/1
  • 财政年份:
    2023
  • 资助金额:
    $ 39.16万
  • 项目类别:
    Research Grant
Collaborative Research: Investigating the genomic basis of key performance traits to quantify the evolutionary potential of coral populations under climate change
合作研究:研究关键性能特征的基因组基础,以量化气候变化下珊瑚种群的进化潜力
  • 批准号:
    2023155
  • 财政年份:
    2021
  • 资助金额:
    $ 39.16万
  • 项目类别:
    Standard Grant
Collaborative Research: Assessing the changing symbiotic milieu on Caribbean coral reefs under climate change: magnitude, tradeoffs, interventions, and implications
合作研究:评估气候变化下加勒比珊瑚礁共生环境的变化:幅度、权衡、干预措施和影响
  • 批准号:
    1851392
  • 财政年份:
    2019
  • 资助金额:
    $ 39.16万
  • 项目类别:
    Continuing Grant
Collaborative Research: Observing the Cosmic Evolution of Neutral Hydrogen
合作研究:观测中性氢的宇宙演化
  • 批准号:
    1814421
  • 财政年份:
    2018
  • 资助金额:
    $ 39.16万
  • 项目类别:
    Standard Grant
REU Site: Physics and Astronomy Research at Rutgers
REU 网站:罗格斯大学物理和天文学研究
  • 批准号:
    1560077
  • 财政年份:
    2016
  • 资助金额:
    $ 39.16万
  • 项目类别:
    Continuing Grant
Adenovirus and coagulation factor interactions and the impact on virus stability and utility for gene therapy
腺病毒和凝血因子的相互作用以及对病毒稳定性和基因治疗效用的影响
  • 批准号:
    BB/L027933/1
  • 财政年份:
    2015
  • 资助金额:
    $ 39.16万
  • 项目类别:
    Research Grant
Adenovirus and coagulation factor interactions and the impact on virus stability and utility for gene therapy
腺病毒和凝血因子的相互作用以及对病毒稳定性和基因治疗效用的影响
  • 批准号:
    BB/L027933/2
  • 财政年份:
    2015
  • 资助金额:
    $ 39.16万
  • 项目类别:
    Research Grant
RAPID: Collaborative Research: Are Eastern Tropical Pacific reefs becoming more resilient to ENSO?
RAPID:合作研究:东部热带太平洋珊瑚礁对 ENSO 的抵抗力是否变得更强?
  • 批准号:
    1447306
  • 财政年份:
    2014
  • 资助金额:
    $ 39.16万
  • 项目类别:
    Standard Grant
New insights into the response of reef corals to climate change using the symbiont to host cell ratio as a metric of bleaching susceptibility
使用共生体与宿主细胞的比率作为白化敏感性的指标,对珊瑚礁珊瑚对气候变化的反应有了新的见解
  • 批准号:
    1358699
  • 财政年份:
    2014
  • 资助金额:
    $ 39.16万
  • 项目类别:
    Standard Grant
TRANSLATING HUMAN EMBRYONIC STEM CELL-DERIVED ENDOTHELIAL CELL THERAPY TO THE CLINIC
将人类胚胎干细胞衍生的内皮细胞疗法转化为临床
  • 批准号:
    MR/K00719X/1
  • 财政年份:
    2013
  • 资助金额:
    $ 39.16万
  • 项目类别:
    Research Grant

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