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- W3103707119 abstract "Flares produce sudden and permanent changes in the horizontal photospheric magnetic field. In particular, flares generally produce increased magnetic shear in the photospheric field along the neutral line. Recent observations also show that flares can produce sudden photospheric motion. We present a model for the observed changes as the response of the photosphere to a large-amplitude shear Alfvén wave propagating down from the corona on either side of the neutral line. The Alfvénic front is assumed to impact the photosphere close to the neutral line first and then successively further away with time, such that the line of impact coincides with the flare ribbon. The wave introduces magnetic shear and velocity shear. The magnetic shear introduced at the photosphere has the same sign on either side of the neutral line, while the velocity shear has the opposite sign. We discuss the possibility that this process is responsible for particle acceleration in flares." @default.
- W3103707119 created "2020-11-23" @default.
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- W3103707119 date "2018-09-12" @default.
- W3103707119 modified "2023-09-25" @default.
- W3103707119 title "Photospheric Response to a Flare" @default.
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- W3103707119 doi "https://doi.org/10.3847/1538-4357/aad8ae" @default.
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