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Statistical Study of Release Time and Its Energy Dependence of In Situ Energetic Electrons in Impulsive Solar Flares

Li, Gang; Wang, Linghua; Zhao, Lulu +3 more

Using the fraction velocity dispersion analysis method, it has been shown recently that in two impulsive solar energetic electron (SEE) events, the release times of near-relativistic electrons at the Sun for outward-propagating electrons are energy dependent and are delayed compared to those of the downward-propagating electrons. In this work, we …

Comparative Solar Minima Using the McIntosh Archive

Gibson, Sarah E.; Webb, David F.; Hewins, Ian M. +3 more

The McIntosh Archive consists of four solar cycles (SC20-23) of synoptic maps of solar features (magnetic polarities, coronal holes, filaments, sunspots, plage) that were produced by Patrick McIntosh and his cartographers. In this paper we present the full Archive for the first time and find a hemispheric pattern of coronal hole polarity reflectin…