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.

我们可见的星系由数十亿颗恒星和大量的气体组成，新的恒星是由这些气体和尘埃形成的，而一些古老的恒星——但只有最大的——在爆炸中死亡，它们死亡时，它们的物质会重新混合在一起。质量较小的恒星，如太阳和较小的恒星，寿命很长，并且永远保持其大部分质量，从气体到恒星的生命周期取决于有多少大恒星和多少小恒星。研究人员试图测试一个模型。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，这将提供大量样本，以准确测量不同恒星的相对数量。将建立一个新的模型框架来预测这些年轻恒星在 ALMA 中的样子，该项目建立的模型将增进我们对星系和行星系统形成环境的理解。以天文学为代表，该项目将涉及一项针对当地中学的推广计划将测量学生对科学的态度，并评估该项目向他们灌输的信心程度，让他们相信自己也有能力。恒星初始质量函数 (IMF) 是了解恒星种群和星系随时间变化的关键。该项目将使用 NSF 的阿塔卡马测量 IMF 的诞生阶段，通常称为核心质量函数 (CMF)。大的对整个银河系大质量恒星形成区域的毫米/亚毫米阵列（ALMA）观测将使原恒星核心的可用样本增加十倍以上，更重要的是，它将对恒星质量的完整动态范围进行采样。 ，从亚太阳到目前正在形成的最大质量，该项目将基于现有的原恒星演化和辐射传输模型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 ALMA 的可观测数据。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力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

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.

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.

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

ALMA-IMF. IX. Catalog and Physical Properties of 315 SiO Outflow Candidates in 15 Massive Protoclusters

• DOI: 10.3847/1538-4357/ad0786
• 发表时间: 2023-12
• 期刊: The Astrophysical Journal
• 作者: A. Towner;A. Ginsburg;P. Dell’Ova;A. Gusdorf;S. Bontemps;T. Csengeri;R. Galván-Madrid;F. Louvet;F. Motte;P. Sanhueza;A. M. Stutz;J. Bally;T. Baug;H.-R. V. Chen;N. Cunningham;M. Fernández-López;H.-L. Liu;X. Lu;T. Nony;M. Valeille-Manet;B. Wu;R. H. Álvarez-Gutiérrez;M. Bonfand;J. di Francesco;Q. Nguyen-Luong;F. Olguin;A. P. Whitworth