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arXiv 2601.00518astro-ph.HEphysics.plasm-ph
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高能辐射来自吸积黑洞湍流电子-离子冠状物

High-energy Emission from Turbulent Electron-ion Coronae of Accreting Black Holes

Centre for mathematical Plasma Astrophysics, Department of Mathematics, KU Leuven(鲁汶大学数学系数学等离子体天体物理中心);Department of Physics, University of Maryland(马里兰大学物理系);Physics Department and Columbia Astrophysics Laboratory, Columbia University(哥伦比亚大学物理系和哥伦比亚天体物理实验室);Max Planck Institute for Astrophysics(马克斯·普朗克天体物理研究所);Department of Astronomy and Joint Space-Science Institute, University of Maryland(马里兰大学天文系和联合空间科学研究所)

Daniel Groselj, Alexander Philippov, Andrei M. Beloborodov, Richard Mushotzky

AI总结:

本文提出了一种模型,研究强湍流黑洞冠状物中粒子加速和辐射机制,通过模拟展示湍流冠状物产生非热离子分布,并与观测到的X射线谱一致,特别以NGC 4151为例,预测MeV尾部辐射由湍流电流片加速的非热电子主导。

摘要:

我们开发了一个模型,研究强湍流黑洞冠状物中粒子加速和辐射机制。我们的局部模型基于一组二维辐射粒子-细胞模拟,包含电子-离子等离子体成分、光子和带电粒子的注入与扩散逃逸以及自洽的康普顿散射。我们表明,一个辐射紧凑的湍流冠状物会产生扩展的非热离子分布,同时产生与观测一致的X射线谱。作为例子,我们展示了与NGC 4151观测到的X射线谱的良好一致。预测的辐射谱特征MeV尾部,可通过未来的MeV波段仪器研究。MeV尾部由在湍流电流片中加速的非热电子塑造。我们还发现,冠状物调节自身进入双温状态,离子温度远高于电子。离子带走约三分之二的耗散功率,其加速由嵌入湍流流中的激波和重联电流片共同驱动。

英文摘要:

We develop a model of particle energization and emission from strongly turbulent black-hole coronae. Our local model is based on a set of 2D radiative particle-in-cell simulations with an electron-ion plasma composition, injection and diffusive escape of photons and charged particles, and self-consistent Compton scattering. We show that a radiatively compact turbulent corona generates extended nonthermal ion distributions, while producing X-ray spectra consistent with observations. As an example, we demonstrate excellent agreement with observed X-ray spectra of NGC 4151. The predicted emission spectra feature an MeV tail, which can be studied with future MeV-band instruments. The MeV tail is shaped by nonthermal electrons accelerated at turbulent current sheets. We also find that the corona regulates itself into a two-temperature state, with ions much hotter than electrons. The ions carry away roughly two-thirds of the dissipated power, and their energization is driven by a combination of shocks and reconnecting current sheets, embedded into the turbulent flow.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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