During major megnetic storms, enhanced flux of relativistic electrons in the inner magnetosphere have been observed to correleated with ULF waves. The enhancements can take place over a period of several hours. In order to account for such a rapid generation of relativistic electrons, we examine the mechanism of transit-time acceleration of electrons by low-frequency fast-mode MHD waves, here the assumed form of ULF waves. Calcaulations of the acceleration timescales in the model show that fast-mode waves in the Pc4 to Pc5 frequency range, with typically observed wave amplitudes 10--20 nT, can accelerate the seed electrons to energies of order MeV in a period of a few hours.
Global Magnetohydrodynamic Simulations of Monster Shocks in Neutron Star Magnetospheres
University of Toronto(多伦多大学);Canadian Institute for Theoretical Astrophysics(加拿大理论天体物理研究所);D. A. Dunlap Department of Astronomy, University of Toronto(多伦多大学D.A.邓普尔天文学系);Perimeter Institute for Theoretical Physics(理论物理前沿研究所);Columbia University(哥伦比亚大学);Max Planck Institute for Astrophysics(马克斯·普朗克天体物理学研究所);California Institute of Technology(加州理工学院);Walter Burke Institute for Theoretical Physics(沃尔特·伯克理论物理研究所)
Photon Acceleration in Magnetized Plasma: A Mechanism for Fast Radio Bursts
ELI Beamlines Facility, Extreme Light Infrastructure ERIC(欧洲极端光基础设施大型设施);Lawrence Berkeley National Laboratory(劳伦斯伯克利国家实验室);National Institutes for Quantum Science and Technology (QST), Kansai Institute for Photon Science(量子科学技术研究机构(QST)关西光子科学研究所);University of Oxford(牛津大学);Princeton University(普林斯顿大学);University of Michigan(密歇根大学);Sorbonne Université(索邦大学)