Determining the Dominant Acceleration Mechanism during Relativistic Magnetic Reconnection in Large-scale Systems

  • Guo F
  • Li X
  • Daughton W
  • et al.
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Abstract

While a growing body of research indicates that relativistic magnetic reconnection is a prodigious source of particle acceleration in high-energy astrophysical systems, the dominant acceleration mechanism remains controversial. Using a combination of fully kinetic simulations and theoretical analysis, we demonstrate that Fermi-type acceleration within the large-scale motional electric fields dominates over direct acceleration from non-ideal electric fields within small-scale diffusion regions. This result has profound implications for modeling particle acceleration in large-scale astrophysical problems, as it opens up the possibility of modeling the energetic spectra without resolving microscopic diffusion regions.

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Guo, F., Li, X., Daughton, W., Kilian, P., Li, H., Liu, Y.-H., … Ma, D. (2019). Determining the Dominant Acceleration Mechanism during Relativistic Magnetic Reconnection in Large-scale Systems. The Astrophysical Journal Letters, 879(2), L23. https://doi.org/10.3847/2041-8213/ab2a15

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