RELATIVISTIC ELECTRONS PRODUCED BY RECONNECTING ELECTRIC FIELDS IN A   LASER-DRIVEN BENCH-TOP SOLAR FLARE

doi:10.3847/0067-0049/225/2/30

CORC > 北京大学 > 工学院

	RELATIVISTIC ELECTRONS PRODUCED BY RECONNECTING ELECTRIC FIELDS IN A LASER-DRIVEN BENCH-TOP SOLAR FLARE
	Zhong, J. Y. ; Lin, J. ; Li, Y. T. ; Wang, X. ; Li, Y. ; Zhang, K. ; Yuan, D. W. ; Ping, Y. L. ; Wei, H. G. ; Wang, J. Q. ; Su, L. N. ; Li, F. ; Han, B. ; Liao, G. Q. ; Yin, C. L. ; Fang, Y. ; Yuan, X. ; Wang, C. ; Sun, J. R. ; Liang, G. Y. ; Wang, F. L. ; Ding, Y. K. ; He, X. T. ; Zhu, J. Q. ; Sheng, Z. M. ; Li, G. ; Zhao, G. ; Zhang, J.
刊名	ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
	2016
关键词	acceleration of particles magnetic reconnection magnetic fields plasmas UNDERSTANDING PARTICLE-ACCELERATION GENERATED MAGNETIC-FIELDS RAY-IMAGING SPECTROSCOPY CURRENT SHEETS NUMERICAL EXPERIMENTS ENERGETIC PARTICLES PHYSICAL-PROPERTIES KAPPA-DISTRIBUTION 2-RIBBON FLARES COSMIC-RAYS
DOI	10.3847/0067-0049/225/2/30
英文摘要	Laboratory experiments have been carried out to model the magnetic reconnection process in a solar flare with powerful lasers. Relativistic electrons with energy up to megaelectronvolts. are detected along the magnetic separatrices bounding the reconnection outflow, which exhibit a kappa-like distribution with an effective temperature of similar to 10(9) K. The acceleration of non-thermal electrons is found to be. more efficient in the case with a guide magnetic field (a component of a. magnetic field along the reconnection-induced electric field) than. in the case without a guide field. Hardening of the spectrum at energies >= 500 keV is observed in both cases, which remarkably resembles the hardening. of hard X-ray and gamma-ray spectra observed in many solar flares. This supports a recent proposal that the hardening in the hard X-ray and gamma-ray emissions of solar flares is due to a hardening of the source-electron spectrum. We also performed numerical simulations that help examine behaviors of electrons in the reconnection process with the electromagnetic field configurations occurring in the experiments. The trajectories of non-thermal electrons observed in the experiments were well duplicated in the simulations. Our numerical simulations generally reproduce the electron energy spectrum as well, except for. the hardening of the electron spectrum. This suggests that other mechanisms such as shock or turbulence may play an important role in the production. of the observed energetic electrons.; 973 Program Grant [2013CBA01503]; NSFC [11273033, 11205015, 11135012, 11220101002, 10821061, 11273055, 11333007]; CAS grant [XDB09040202]; Beijing Nova Program Grant [Z131109000413050]; SCI(E); ARTICLE; gzhao@bao.ac.cn; jzhang1@sjtu.edu.cn; 2; 225
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/491679]
专题	工学院
推荐引用方式 GB/T 7714	Zhong, J. Y.,Lin, J.,Li, Y. T.,et al. RELATIVISTIC ELECTRONS PRODUCED BY RECONNECTING ELECTRIC FIELDS IN A LASER-DRIVEN BENCH-TOP SOLAR FLARE[J]. ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES,2016.
APA	Zhong, J. Y..,Lin, J..,Li, Y. T..,Wang, X..,Li, Y..,...&Zhang, J..(2016).RELATIVISTIC ELECTRONS PRODUCED BY RECONNECTING ELECTRIC FIELDS IN A LASER-DRIVEN BENCH-TOP SOLAR FLARE.ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES.
MLA	Zhong, J. Y.,et al."RELATIVISTIC ELECTRONS PRODUCED BY RECONNECTING ELECTRIC FIELDS IN A LASER-DRIVEN BENCH-TOP SOLAR FLARE".ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES (2016).