Collaborative Research: Charting the Supernova-Gas-Stars Connection via a Major New VLA Survey of the Local Group

合作研究：通过对当地群进行的一项重大的新 VLA 巡天绘制超新星-气体-恒星的联系

• 批准号: 2205631
• 负责人: Laura Chomiuk
• 金额: $ 32.23万
• 依托单位: Michigan State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-08-15 至 2025-07-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2205631&HistoricalAwards=false
• 关键词: Collaborative; Research; Charting; Supernova; Gas

Stars form from interstellar gas. In present-day galaxies, most of that interstellar gas is atomic gas, called HI gas. Despite decades of study, major mysteries still surround the interaction of HI, supernova explosions, and massive young stars. The investigators are conducting a major new survey using the NSF's Very Large Array (VLA). They are using the VLA to better measure the structure of HI and radio emission from the nearby galaxies. The investigators will answer a series of key questions about galaxies’ stellar life cycles. The investigators study how ``stellar nurseries'' of cold, opaque gas form. At the end of the short lives of massive stars, supernova explosions shape the gas in galaxies, and the investigators will measure the resulting the interstellar turbulence seen in galaxies. The research program will have a broad societal impact through planetariums shows, a citizen science project, and a suite of hands-on tutorials aimed at students at the middle school, high school, and college levels.This proposal will address these questions by supporting the observation, processing, and scientific analysis of the Local Group L-Band Survey (LGLBS): a major new Karl G. Jansky Very Large Array (VLA) survey of the Local Group of galaxies. This survey uses 1,800 hours of VLA time to observe the six northern Local Group star-forming galaxies, including Andromeda, with an unprecedented combination of spatial resolution, spectral resolution, bandwidth, and sensitivity. LGLBS simultaneously covers the 21-cm line, which traces HI, and the 1--2 GHz radio continuum emission, which traces past SN explosions and warm gas around massive stars. These are the only galaxies close enough that the VLA can resolve the interactions between the interstellar medium (ISM), star formation, and stellar feedback.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.

星际气体形成星星。在当今的星系中，大多数星际气体都是原子气，称为HI气体。尽管进行了数十年的研究，但仍围绕着HI，超新星爆炸和大型年轻明星的相互作用的主要神秘。研究人员正在使用NSF的非常大的阵列（VLA）进行了一项重大的新调查。他们正在使用VLA更好地测量附近星系中的HI和无线电发射的结构。调查人员将回答有关星系恒星生命周期的一系列关键问题。研究人员研究了冷不透气的``恒星苗圃''如何。在巨大恒星的短寿命结束时，超新星爆炸构成了星系中的气体，研究人员将测量星系中看到的星际湍流。 The research program will have a broad social impact through planetariums shows, a citizen science project, and a suite of hands-on tutorials aimed at students at the middle school, high school, and college levels.This proposal will address these questions by supporting the observation, processing, and scientific analysis of the Local Group L-Band Survey (LGLBS): a major new Karl G. Jansky Very Large Array (VLA) survey of the Local Group of galaxies.该调查使用1800小时的VLA时间来观察包括仙女座在内的六个北部本地组形成的星系，并具有空间分辨率，光谱分辨率，带宽和灵敏度的前所未有的组合。 lglbs只是覆盖了21厘米线，该线路追踪了HI和1--2 GHz无线电连续发射，它可以追溯到SN爆炸和巨大恒星周围的温暖气体。这些是唯一足够接近的星系，可以解决VLA可以解决星际介质（ISM），星形形成和出色的反馈之间的相互作用。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优点和更广泛的影响来审查标准，通过评估来诚实地对支持进行评估。