期刊
SCIENCE
卷 350, 期 6265, 页码 1238-1242出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.aac8467
关键词
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资金
- NASA [SP02H1701R, NNM07AB07C, NNX14AK66G, NAS598033]
- NASA Living With a Star Jack Eddy Fellowship
- NSF SHINE [AGS-1156076, AGS-1358342]
- NSF [AST-1312802]
- Direct For Mathematical & Physical Scien
- Division Of Astronomical Sciences [1312802] Funding Source: National Science Foundation
- Div Atmospheric & Geospace Sciences
- Directorate For Geosciences [1429512, 1358342] Funding Source: National Science Foundation
- NASA [680138, NNX14AK66G] Funding Source: Federal RePORTER
Solar flares-the most powerful explosions in the solar system-are also efficient particle accelerators, capable of energizing a large number of charged particles to relativistic speeds. A termination shock is often invoked in the standard model of solar flares as a possible driver for particle acceleration, yet its existence and role have remained controversial. We present observations of a solar flare termination shock and trace its morphology and dynamics using high-cadence radio imaging spectroscopy. We show that a disruption of the shock coincides with an abrupt reduction of the energetic electron population. The observed properties of the shock are well reproduced by simulations. These results strongly suggest that a termination shock is responsible, at least in part, for accelerating energetic electrons in solar flares.
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