Collaborative Research: WoU-MMA: Multi-scale and multi-messenger modeling of jets in active galactic nuclei

合作研究：WoU-MMA：活动星系核喷流的多尺度和多信使建模

• 批准号: 1910248
• 负责人: Alexander Philippov
• 金额: $ 15万
• 依托单位: Princeton University
• 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=1910248&HistoricalAwards=false
• 关键词: Collaborative; Research; WoU; MMA; Multi

Part 1Galaxies are vast collections of hundreds of billions of stars. In a minority of the galaxies their observed light is dominated by a single source: the supermassive black hole located at their very center. In these galaxies, the black hole feeds on material which turns into very hot ionized gas or plasma. Surprisingly, part of this material is ejected away from the black hole forming narrow beams of plasma that move at near the speed of light. These beams, when directed at Earth, make some of the brightest and extreme sources ever observed in the Universe. The proposing team plans to perform the largest numerical simulations to study how matter falls from the vast scale of the galaxy into the tiny scale of the black hole and follow how the narrow fast beams of plasma form and shine as they propagate through the galaxy. The results from the numerical simulations will be publicly accessible through a user-friendly, interactive website. The user (scientist, teacher or high-school student) will be able to generate images of these beams in real-time and will thus be exposed to an exciting field of modern high-energy astrophysics.Part 2Recent detection by the IceCube Neutrino Observatory of a very high energy neutrino event coincident with multi-wavelength flaring of blazar TXS 0506+056 strongly suggests that blazars do not only produce high-energy photons but also ultra-high-energy cosmic rays and neutrinos. This exciting multi-messenger discovery motivates a detailed study of relativistic jet physics, to interpret this and upcoming multi-messenger observations of active galactic nuclei (AGN). The team proposes to perform multi-scale jet simulations that connect accretion physics, fluid dynamics, particle acceleration, and radiative transfer, to study the multi-wavelength polarized radiation signatures and neutrinos from AGN jets. The team plans to perform the largest to date general relativistic magnetohydrodynamic simulations of AGN accretion and jets, extending from the black hole to the blazar emission zone. They will use first-principle kinetic plasma simulations to calculate particle acceleration in jet dissipation zones and build comprehensive multi-messenger polarized radiative transfer that includes all the relevant physics. In this way, the team can bridge the gap between first-principle modeling and multi-messenger observations, and advance the understanding of AGN jet physics responsible for multi-messenger emission. The team will disseminate the results to the public through an immersive website, train high-school students, and organize a summer school in compact objects for graduate students, where participants will work on theoretical and/or numerical problems at the forefront of the research field.This award addresses/advances the goals of the Windows on the Universe Big Idea.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.

第1部分是数千亿颗恒星的大量收藏。在少数星系中，他们观察到的光主要由单个来源：位于其中心的超大质量黑洞。在这些星系中，黑洞以变成非常热的离子气体或血浆的材料为食。令人惊讶的是，该材料的一部分被弹出远离黑洞，形成了狭窄的等离子体梁，这些血浆以接近光速移动。这些光束指向地球时，可以使宇宙中有史以来观察到的一些最明亮，最极端的来源。 提议的团队计划执行最大的数值模拟，以研究物质如何从星系的巨大规模落入黑洞的微小规模，并遵循狭窄的等离子体形式的快速光束，并在它们通过星系传播时如何发光。数值模拟的结果将通过用户友好的交互式网站公开访问。用户（科学家，教师或高中生）将能够实时生成这些光束的图像，因此将暴露于令人兴奋的现代高能量天体物理学的令人兴奋的领域。第2部分由Icecube Neutrino观测值进行2次检测，该观测值是非常高的能量中性事件的唯一含量为blazar the blazar TXS+056+056+056+056高能光子，也是超高的宇宙射线和中微子。这种令人兴奋的多理智的发现激发了对相对论喷气物理学的详细研究，以解释这一点和即将进行的主动银河核（AGN）的多通信观察。该团队提议进行多尺度的喷气模拟，以将积聚物理，流体动力学，颗粒加速度和辐射转移连接起来，以研究来自AGN Jets的多波长极化辐射标志和中微子。该团队计划对AGN积聚和喷气式飞机进行最大的一般相对论磁流失动力学模拟，从黑洞延伸到Blazar排放区。他们将使用第一原则动力学等离子体模拟来计算喷气耗散区域的颗粒加速度，并建立全面的多理智辐射转移，其中包括所有相关的物理。通过这种方式，团队可以弥合第一原则建模和多理智观测之间的差距，并提高对负责多门剂排放的AGN喷气物理学的理解。 The team will disseminate the results to the public through an immersive website, train high-school students, and organize a summer school in compact objects for graduate students, where participants will work on theoretical and/or numerical problems at the forefront of the research field.This award addresses/advances the goals of the Windows on the Universe Big Idea.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's智力优点和更广泛的影响审查标准。

项目成果

Dynamic Alignment and Plasmoid Formation in Relativistic Magnetohydrodynamic Turbulence

相对论磁流体动力湍流中的动态排列和等离子体团形成

• DOI: 10.3847/2041-8213/ac3afa
• 发表时间: 2021
• 期刊: The Astrophysical Journal Letters
• 作者: Chernoglazov, Alexander;Ripperda, Bart;Philippov, Alexander
• 通讯作者: Philippov, Alexander

Radiative Reconnection-powered TeV Flares from the Black Hole Magnetosphere in M87

• DOI: 10.3847/2041-8213/acb264
• 发表时间: 2022-09
• 期刊: The Astrophysical Journal Letters
• 作者: Hayk Hakobyan;B. Ripperda;A. Philippov

Particle Acceleration in Kink-unstable Jets

扭结不稳定射流中的粒子加速

• DOI: 10.3847/2041-8213/ab95a2
• 发表时间: 2020
• 期刊: The Astrophysical Journal
• 作者: Davelaar, Jordy;Philippov, Alexander A.;Bromberg, Omer;Singh, Chandra B.
• 通讯作者: Singh, Chandra B.