Relativistic non-thermal particle acceleration in two-dimensional collisionless magnetic reconnection
Relativistic non-thermal particle acceleration in two-dimensional collisionless magnetic reconnection
复制标题
二维无碰撞磁重联中的相对论非热粒子加速
DOI:
10.1017/s0022377822000046
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发表时间:
2022
影响因子:
2.5
通讯作者:
Uzdensky, Dmitri A.
中科院分区:
文献类型:
--
作者:
Uzdensky, Dmitri A.
Magnetic reconnection, especially in the relativistic regime, provides an efficient mechanism for accelerating relativistic particles and thus offers an attractive physical explanation for non-thermal high-energy emission from various astrophysical sources. I present a simple analytical model that elucidates key physical processes responsible for reconnection-driven relativistic non-thermal particle acceleration in the large-system, plasmoid-dominated regime in two dimensions. The model aims to explain the numerically observed dependencies of the power-law index until they become magnetized by the reconnected magnetic field and eventually trapped in plasmoids large enough to confine them. The model also includes diffusive Fermi acceleration by particle bouncing off rapidly moving plasmoids. I argue that the balance between electric acceleration and magnetization controls the power-law index, while trapping in plasmoids governs the cutoff, thus tying the particle energy spectrum to the plasmoid distribution.
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影响因子:
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通讯作者:
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DOI:
--
发表时间:
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期刊:
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DOI:
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发表时间:
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影响因子:
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作者:
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DOI:
10.3847/1538-4357/ab4c33
发表时间:
2019-09
期刊:
The Astrophysical Journal
影响因子:
--
作者:
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