Cosmic Ray Feedback in a Multi-Phase Medium

多相介质中的宇宙射线反馈

• 批准号: 1911198
• 负责人: Siang Peng Oh
• 金额: $ 54.77万
• 依托单位: University of California-Santa Barbara
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2019
• 资助国家: 美国
• 起止时间: 2019-09-01 至 2023-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1911198&HistoricalAwards=false
• 关键词: Cosmic; Ray; Feedback; Multi; Phase

Over cosmic time, galaxies grow by acquiring gas and turning it into stars. Models of the growth of galaxies need to deal with the influence of star formation and evolution on the rate at which gas is then cooled and turned into more stars, in a process known as 'feedback'. This project will develop better models on the role that high-energy particles known as cosmic rays play in feedback. These models will then be made available to astrophysicists to better model galaxy growth.The proposed project will develop 'small-scale physics' models of how cosmic rays interact with cold and warm gas in the circumgalactic medium. They will look at a number of interactions involving cosmic rays, including turbulence, thermal instabilities, and cloud entrainment. This physics will then be incorporated in MHD codes for modeling feedback in galaxies.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.

在宇宙时间里，星系通过获取气体并将其转变为恒星而生长。星系生长模型需要处理恒星形成和演化对气体冷却并转变为更多恒星的速率的影响，这一过程称为“反馈”。该项目将针对称为宇宙射线的高能粒子在反馈中的作用开发更好的模型。然后，这些模型将提供给天体物理学家，以更好地模拟星系的生长。拟议的项目将开发宇宙射线如何与环绕星系介质中的冷气体和暖气体相互作用的“小规模物理”模型。他们将研究涉及宇宙射线的许多相互作用，包括湍流、热不稳定性和云夹带。然后，这种物理现象将被纳入 MHD 代码中，用于对星系中的反馈进行建模。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

Cooling-driven coagulation

冷却驱动凝固

• DOI: 10.1093/mnras/stad1874
• 发表时间: 2023-06
• 期刊: Monthly Notices of the Royal Astronomical Society
• 影响因子: 4.8
• 作者: Gronke, Ma;Oh, S. Peng
• 通讯作者: Oh, S. Peng

Fluid simulations of cosmic ray-modified shocks

宇宙射线修正激波的流体模拟

• DOI: 10.1093/mnras/stab1926
• 发表时间: 2020-08-24
• 期刊: Monthly Notices of the Royal Astronomical Society
• 影响因子: 4.8
• 作者: T. Tsung;S. Oh;Yan
• 通讯作者: Yan

The impact of cosmic rays on thermal and hydrostatic stability in galactic haloes

宇宙射线对星系晕热稳定性和静水稳定性的影响

• DOI: 10.1093/mnras/stad2720
• 发表时间: 2023-09
• 期刊: Monthly Notices of the Royal Astronomical Society
• 影响因子: 4.8
• 作者: Tsung, Tsun Hin Navin;Oh, S. Peng;Bustard, Chad
• 通讯作者: Bustard, Chad

Cloudy with a chance of rain: accretion braking of cold clouds

多云，有可能下雨：冷云的吸积制动

• DOI: 10.1093/mnras/stad236
• 发表时间: 2023-01
• 期刊: Monthly Notices of the Royal Astronomical Society
• 影响因子: 4.8
• 作者: Tan, Brent;Oh, S. Peng;Gronke, Ma
• 通讯作者: Gronke, Ma

Turbulent heating in a stratified medium

分层介质中的湍流加热

• DOI: 10.1093/mnras/stad003
• 发表时间: 2023-01
• 期刊: Monthly Notices of the Royal Astronomical Society
• 影响因子: 4.8
• 作者: Wang, C.;Oh, S. P.;Ruszkowski, M.
• 通讯作者: Ruszkowski, M.