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Quasi-periodic Pulsations in Solar and Stellar Flares: Re-evaluating their Nature in the Context of Power-law Flare Fourier Spectra
Dominique, M.; Ireland, J.; Inglis, A. R.
The nature of quasi-periodic pulsations (QPPs) in solar and stellar flares remains debated. Recent work has shown that power-law-like Fourier power spectra are an intrinsic property of solar and stellar flare signals, a property that many previous studies of this phenomenon have not accounted for. Hence a re-evaluation of the existing interpretati…
Structure and Dynamics of the 2012 November 13/14 Eclipse White-light Corona
Seaton, D. B.; Rušin, V.; Saniga, M. +9 more
Continuing our series of observations of coronal motion and dynamics over the solar-activity cycle, we observed from sites in Queensland, Australia, during the 2012 November 13 (UT)/14 (local time) total solar eclipse. The corona took the low-ellipticity shape typical of solar maximum (flattening index ɛ = 0.01), a change from the composite corona…
SWAP Observations of Post-flare Giant Arches in the Long-Duration 14 October 2014 Solar Eruption
West, Matthew J.; Seaton, Daniel B.
On 2014 October 14 the Sun Watcher with Active Pixels and Image Processing EUV solar telescope on board the Project for On Board Autonomy 2 spacecraft observed an eruption that led to the formation of perhaps the largest post-eruptive loop system seen in the solar corona in solar cycle 24. The initial eruption occurred at about 18:30 UT on October…
Solar Micro-Type III Burst Storms and Long Dipolar Magnetic Field in the Outer Corona
Misawa, H.; Kasaba, Y.; Miyoshi, Y. +4 more
Solar micro-type III radio bursts are elements of the so-called type III storms and are characterized by short-lived, continuous, and weak emissions. Their frequency of occurrence with respect to radiation power is quite different from that of ordinary type III bursts, suggesting that the generation process is not flare-related, but due to some re…