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Speed-dependent Threshold for Electron Injection into Diffusive Shock Acceleration

delete2025-11-20
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OA
AI
S
Siddhartha Gupta
D
Damiano Caprioli
A
Anatoly Spitkovsky
DOI：10.3847/2041-8213/ae1ba9delete
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摘要

摘要

En 中文
寻找电子在无碰撞激波中通过扩散激波加速（DSA）的注入阈值一直是一个长期未解决的难题。通过第一性原理动理学模拟，我们确定了电子进入DSA的条件，并量化了在自生电磁湍流中非热尾的演化。通过分析电子轨迹及其在激波重跨周期中的动量增益，我们证明当电子速度足够大以至于能够超越激波时，它们开始参与DSA。我们开发了一个最小模型，表明速度相关的注入能够再现动理学模拟中观察到的非热电子谱。我们的发现建立了一个新的电子DSA判据，这对空间/天体物理系统中由激波驱动的非热发射具有广泛的影响。

期刊

T
The Astrophysical Journal Letters
IF:
0
论文数:
357
被引数:
1

机构

D
department of astronomy and astrophysics, the university of chicago, il 60637, usa
学者数:
1
论文数: 1
被引数: 0
D
department of astrophysical sciences, princeton university, 4 ivy lane, princeton, nj 08544, usa; gsiddhartha@princeton.edu
学者数:
2
论文数: 1
被引数: 0
引用论文

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