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Intergalactic magnetic fields and plasma effects of relativistic pair beams from photon-photon-absorption of the TeV emission of cosmological blazars

宇宙耀变体 TeV 发射的光子-光子吸收产生的相对论对光束的星系间磁场和等离子体效应

基本信息

批准号：
268773749
负责人：
Professor Dr. Reinhard Schlickeiser
金额：
--
依托单位：
Institut für Theoretische Physik IV: Weltraum- und Astrophysik
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2015
资助国家：
德国
起止时间：
2014-12-31 至 2020-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/268773749?language=en
关键词：
Intergalactic magnetic fields plasma effects

项目摘要

The TeV detections of more than 30 blazars at cosmological distances by air-Cherenkov telecopes have led to the emergence of the new plasma-blazar-cosmology discipline with active and important contributions from our group. Any blazar more distant than redshift $z=0.16$ produces energetic $e^{\pm }$ particle beams in double photon collisions with the extragalactic background light, which are subject to rapid two-stream-like instabilities of both electrostatic and electromagnetic nature in the unmagnetized intergalactic medium. The dissipation of the free pair beam energy in the intergalactic medium has important consequences for the thermal history of the intergalactic medium and the formation of cosmic structures after the reionization epoch. The proposal adresses important plasma physical and particle physical processes, including the more detailed relativistic kinematics of pair production by double photon collision, the kinetic instability analysis of oblique electrostatic and electromagnetic fluctuations from pair beams, jitter radiation radio halos of relaxed relativistic pairs in fluctuating aperiodic magnetic fields, and the investigation of plasma effects on ultrahighenergy hadron beams in the unmagnetized intergalactic medium.

在宇宙学距离的空气切伦科夫望远镜超过30个耀变体的TeV探测导致了新的等离子体耀变体宇宙学学科的出现，我们的小组作出了积极和重要的贡献。任何距离大于红移z=0.16$的耀变体，在与河外背景光的双光子碰撞中产生高能的e^{\pm }$粒子束，在未磁化的星系际介质中，这些粒子束会受到快速的静电和电磁性质的双流不稳定性的影响。自由对束能量在星系际介质中的耗散对星系际介质的热历史和再电离期后宇宙结构的形成具有重要影响。该提案涉及重要的等离子体物理和粒子物理过程，包括通过双光子碰撞产生对的更详细的相对论运动学，来自对束的倾斜静电和电磁波动的动力学不稳定性分析，波动非周期磁场中松弛相对论对的抖动辐射射电晕，以及等离子体对非磁化星系际介质中超高能强子束的影响的研究。