Determining the Origin of the Types of Stars found in Galaxies

确定星系中恒星类型的起源

• 批准号: 2008101
• 负责人: Adam Ginsburg
• 金额: $ 33万
• 依托单位: University of Florida
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-08-15 至 2024-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2008101&HistoricalAwards=false
• 关键词: Determining; Origin; Types; Stars; found

Our visible Galaxy consists of billions of stars and vast amounts of gas, and dust. New stars form from this gas and dust, and some old stars - but only the biggest - die in explosions. When they die, their matter gets mixed back into the star-forming reservoir. The less-massive stars, those like our Sun and smaller, live a very long time and keep most of their mass forever. The lifecycle from gas to stars and back depends on how many big and how many small stars are formed. The investigator seeks to test a model to explain the observed distribution of masses of stars. This investigation will measure the gas and dust that is just about to form new stars. ALMA observations of thousands of young stars will provide a large sample, which is needed to accurately measure the relative numbers of different star sizes. A new modeling framework will be built to predict what these young stars will look like to ALMA. The models this project builds will advance our understanding of galaxies and the formation environments of planetary systems.To further advance the education of groups under-represented in astronomy, this project will involve an outreach program targeted at local middle schools. The investigators will bring solar telescopes to these schools to give a daytime astronomy experience. Students' attitudes toward science will be measured, assessing the degree to which this project instilled in them the confidence that they too can be scientists.The stellar initial mass function (IMF) is key to understanding stellar populations and galaxy changes over time. This project will measure the natal phase of the IMF, often referred to as the core mass function (CMF), using the NSF’s Atacama Large Millimeters/submillimeter Array (ALMA) observations of massive star forming regions throughout the Galaxy. The project will increase the available sample of proto-stellar cores by more than a factor of ten. More importantly, it will sample the full dynamic range of star masses, from sub-solar to the most massive that are forming at present. The project will develop a new modeling framework based on existing proto-stellar evolution and radiative transfer models, bringing them together in a coherent toolkit for predicting observables for ALMA and similar telescopes.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.

我们可见的银河系由数十亿颗恒星和大量的气体和尘埃组成。 新的恒星从这些气体和尘埃中形成，一些老恒星-但只有最大的-在爆炸中死亡。 当它们死亡时，它们的物质会混合回到恒星形成的储存库中。 质量较小的恒星，比如我们的太阳和更小的恒星，寿命很长，并且永远保持大部分质量。 从气体到恒星再返回的生命周期取决于有多少大恒星和多少小恒星形成。 研究人员试图测试一个模型来解释观测到的恒星质量分布。 这项研究将测量即将形成新恒星的气体和尘埃。 阿尔马对数千颗年轻恒星的观测将提供一个大样本，这是精确测量不同星星大小的相对数量所需要的。 将建立一个新的建模框架来预测这些年轻恒星对阿尔马的外观。 该项目建立的模型将促进我们对星系和行星系统形成环境的理解。为了进一步促进天文学代表性不足的群体的教育，该项目将涉及针对当地中学的推广计划。 研究人员将把太阳望远镜带到这些学校，让他们体验白天的天文学。 学生们对科学的态度将被测量，评估这个项目在多大程度上灌输了他们的信心，他们也可以成为科学家。恒星初始质量函数（IMF）是理解恒星种群和星系随时间变化的关键。 该项目将测量IMF的纳塔尔阶段，通常被称为核心质量函数（CMF），使用NSF的阿塔卡马大型毫米/亚毫米阵列（阿尔马）观测整个银河系的大质量星星形成区域。 该项目将使原恒星核心的可用样本增加十倍以上。 更重要的是，它将对星星质量的全动态范围进行采样，从太阳系以下到目前正在形成的最大质量。 该项目将在现有的原恒星演化和辐射传输模型的基础上开发一个新的建模框架，将它们整合到一个连贯的工具包中，用于预测阿尔马和类似望远镜的观测数据。该奖项反映了NSF的法定使命，并被认为值得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来支持。

项目成果

Supersonic Expansion of the Bipolar H ii Region Sh2-106: A 3500 Year Old Explosion?

• DOI: 10.3847/1538-4357/ac30de
• 发表时间: 2021-11
• 期刊: The Astrophysical Journal
• 作者: J. Bally;Zen H. Chia;A. Ginsburg;B. Reipurth;Kei E. I. Tanaka;H. Zinnecker;J. Faulhaber

An Updated Modular Set of Synthetic Spectral Energy Distributions for Young Stellar Objects

年轻恒星天体合成光谱能量分布的更新模块化集

• DOI: 10.3847/1538-4357/ad072d
• 发表时间: 2024
• 期刊: The Astrophysical Journal
• 作者: Richardson, Theo;Ginsburg, Adam;Indebetouw, Rémy;Robitaille, Thomas P.
• 通讯作者: Robitaille, Thomas P.

Kinematics of Galactic Centre clouds shaped by shear-seeded solenoidal turbulence

由剪切种子螺线管湍流形成的银河中心云的运动学

• DOI: 10.1093/mnras/stad2344
• 发表时间: 2023
• 期刊: Monthly Notices of the Royal Astronomical Society
• 影响因子: 4.8
• 作者: Petkova, Maya A.;Kruijssen, J. M. Diederik;Henshaw, Jonathan D.;Longmore, Steven N.;Glover, Simon C. O.;Sormani, Mattia C.;Armillotta, Lucia;Barnes, Ashley T.;Klessen, Ralf S.;Nogueras-Lara, Francisco
• 通讯作者: Nogueras-Lara, Francisco

Pyspeckit: A Spectroscopic Analysis and Plotting Package

Pyspeckit：光谱分析和绘图包

• DOI: 10.3847/1538-3881/ac695a
• 发表时间: 2022
• 期刊: The Astronomical Journal
• 作者: Ginsburg, Adam;Sokolov, Vlas;de Val-Borro, Miguel;Rosolowsky, Erik;Pineda, Jaime E.;Sipőcz, Brigitta M.;Henshaw, Jonathan D.
• 通讯作者: Henshaw, Jonathan D.

Clustered Star Formation in the Center of NGC 253 Contributes to Driving the Ionized Nuclear Wind

• DOI: 10.3847/1538-4357/ac0fe8
• 发表时间: 2021-06
• 期刊: The Astrophysical Journal
• 作者: E. Mills;M. Gorski;K. Emig;A. Bolatto;R. C. Levy;A. Leroy;A. Ginsburg;J. Henshaw;L. Zschaechner-L.