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• W3121070273 startingPage "A108" @default.
• W3121070273 abstract "It is well known that solar flares have broad impacts on the low atmosphere, but it is largely unknown how they affect sunspot waves and oscillations. It is also under debate as to whether the flare-induced photospheric changes are due to the momentum conservation with coronal mass ejections or due to magnetic reconnection. To shed light on the so-called back reaction of solar eruptions, we investigated how running penumbral waves (RPWs) at one foot of an erupting magnetic flux rope (MFR) responds to the rope buildup and subsequent erosion. During the rope-buildup stage, the western foot of the rope, which is completely enclosed by a hooked ribbon, expands rapidly and consequently overlaps a sunspot penumbra. This converts the original penumbral field into the rope field, which is associated with a transient increase in electric currents flowing through the ribbon-swept penumbral region. During the rope-erosion stage, the rope foot shrinks as the eastern section of the hooked ribbon slowly sweeps the same penumbral region, where the rope field is converted into flare loops. This conversion induces mixed effects on the photospheric field inclination but heats up the low atmosphere at the footpoints of these flare loops to transition-region temperatures, therefore resulting in the post-eruption RPWs with an enhanced contrast in the 1600A passband and an extended bandwidth to low frequencies at 3-5 mHz, compared with the pre-eruption RPWs that peak at 6 mHz. This observation clearly demonstrates that it is the magnetic reconnection in the corona that impacts the low atmosphere and leads to the changing behaviors of RPWs, which, in turn, offer a new window to diagnose flare reconnections." @default.
• W3121070273 created "2021-01-18" @default.
• W3121070273 creator A5055382560 @default.
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• W3121070273 date "2021-03-01" @default.
• W3121070273 modified "2023-10-18" @default.
• W3121070273 title "Effects of erupting magnetic flux rope on running penumbral waves" @default.
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• W3121070273 doi "https://doi.org/10.1051/0004-6361/202039732" @default.
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