Collaborative Research: WoU-MMA: Bridging the gap between fluid and plasma scales in AGN jets

合作研究：WoU-MMA：弥合 AGN 射流中流体和等离子体尺度之间的差距

• 批准号: 2108201
• 负责人: Lorenzo Sironi
• 金额: $ 27.09万
• 依托单位: Columbia University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-09-01 至 2024-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2108201&HistoricalAwards=false
• 关键词: Collaborative; Research; WoU; MMA; Bridging

When matter falls into supermassive black holes, it forms a disk of material. Jets of matter streaming away from the disk can be produced in the extreme environment of a black hole. These jets are promising sources of high energy cosmic rays and neutrinos that can be detected on Earth. This project will produce computer models of the acceleration of particles in these jets. The project will combine two techniques to provide a better understanding of how and where cosmic rays and neutrinos are produced in jets. The techniques can also be applied to other sources of cosmic rays, such as gamma ray bursts and pulsars. The project will also develop an interactive website that introduces the latest developments of the research. This website will be combined with day-long workshops to make the material accessible to high-school students. A program will also be developed to bring astrophysics discussions to soup kitchens in the New York City area. This award advances the goals of the Windows on the Universe Big Idea.Modeling of the acceleration of particles in astrophysical jets will be done with relativistic magnetohydrodynamics and particle-in-cell codes that can tie small scale non-thermal processes with larger scale fluid models. The approach used will allow for the development of mid-scale studies linking the regimes of the two different codes. Models of radiative processes will then be applied to the output of the mid-scale models to produce reliable radiative signatures expected from different regions and processes within the jets. The approach used in this work can be also applied to gamma ray bursts, double neutron star mergers, and pulsar wind nebulae. The project will also provide research opportunities for undergraduate students. The project will develop an interactive website called "Astrophysics Lab on Cosmic Rays" which can be used in both undergraduate and high-school settings. Use of the materials in the high-schools will be assisted by day-long worktops for educators and students. The project will also implement a program called "Astro-soup", where serving food to the homeless in NYC will be accompanied by a more structured discussion on astrophysical topics.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.

当物质落入超大质量黑洞时，它会形成一个物质盘。从盘中流出的物质射流可以在黑洞的极端环境中产生。这些喷流是可以在地球上检测到的高能宇宙射线和中微子的有前途的来源。该项目将产生这些射流中粒子加速的计算机模型。该项目将结合两种技术，以更好地了解喷流中宇宙射线和中微子的产生方式和地点。该技术还可以应用于其他宇宙射线源，例如伽马射线暴和脉冲星。该项目还将开发一个互动网站，介绍该研究的最新进展。该网站将与为期一天的研讨会相结合，以使高中生能够接触到这些材料。还将制定一项计划，将天体物理学讨论带到纽约市地区的施粥处。该奖项推进了“宇宙之窗”大构想的目标。天体物理射流中粒子加速的建模将通过相对论磁流体动力学和细胞内粒子代码来完成，这些代码可以将小规模非热过程与更大规模的流体模型联系起来。所使用的方法将允许开展连接两种不同守则制度的中期研究。然后，辐射过程模型将应用于中型模型的输出，以产生来自喷流内不同区域和过程的可靠辐射特征。这项工作中使用的方法也可以应用于伽马射线爆发、双中子星合并和脉冲星风星云。该项目还将为本科生提供研究机会。该项目将开发一个名为“宇宙射线天体物理实验室”的互动网站，可供本科生和高中使用。高中的材料使用将得到教育工作者和学生全天工作台的帮助。该项目还将实施一个名为“Astro-soup”的计划，为纽约市的无家可归者提供食物，同时将进行关于天体物理学主题的更有条理的讨论。该奖项反映了 NSF 的法定使命，并通过使用评估结果被认为值得支持。基金会的智力价值和更广泛的影响审查标准。

项目成果

Comptonization by reconnection plasmoids in black hole coronae II: Electron-ion plasma

黑洞日冕中重联等离子体团的复合化 II：电子离子等离子体

• DOI: 10.1093/mnras/stac2730
• 发表时间: 2022-09
• 期刊: Monthly Notices of the Royal Astronomical Society
• 影响因子: 4.8
• 作者: Sridhar, Navin;Sironi, Lorenzo;Beloborodov, Andrei M.
• 通讯作者: Beloborodov, Andrei M.

Linear analysis of the Kelvin–Helmholtz instability in relativistic magnetized symmetric flows

相对论磁化对称流中开尔文亥姆霍兹不稳定性的线性分析

• DOI: 10.1093/mnras/stad1833
• 发表时间: 2023-06
• 期刊: Monthly Notices of the Royal Astronomical Society
• 影响因子: 4.8
• 作者: Chow, Anthony;Rowan, Michael E.;Sironi, Lorenzo;Davelaar, Jordy;Bodo, Gianluigi;Narayan, Ramesh
• 通讯作者: Narayan, Ramesh

Relativistic Asymmetric Magnetic Reconnection

相对论不对称磁重联

• DOI: 10.1103/physrevlett.128.145101
• 发表时间: 2022-04
• 期刊: Physical Review Letters
• 影响因子: 8.6
• 作者: Mbarek, Rostom;Haggerty, Colby;Sironi, Lorenzo;Shay, Michael;Caprioli, Damiano
• 通讯作者: Caprioli, Damiano