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Observations and modelling of Helium lines in solar flares
Paulo J. A. Simões, Lyndsay Fletcher, Nicolas Labrosse +1
We explore the response of the He II 304 Å and He I 584 Å line intensities to electron beam heating in solar flares using radiative hydrodynamic simulations. Comparing different el…
IAU commission 10 "Solar Activity": Legacy report and triennial report for 2012-2015
Carolus J. Schrijver, Lyndsay Fletcher, Lidia van Driel-Gesztelyi +8
After more than half a century of community support related to the science of "solar activity'', IAU's Commission 10 was formally discontinued in 2015, to be succeeded by C.E2 with…
IRIS Observations of the Mg II h & k Lines During a Solar Flare
Graham S. Kerr, Paulo J. A. Simões, Jiong Qiu +1
The bulk of the radiative output of a solar flare is emitted from the chromosphere, which produces enhancements in the optical and UV continuum, and in many lines, both optically t…
A solar tornado observed by EIS: Plasma diagnostics
Peter Levens, Nicolas Labrosse, Lyndsay Fletcher +1
The term `solar tornadoes' has been used to describe apparently rotating magnetic structures above the solar limb, as seen in high resolution images and movies from the Atmospheric…
A unified view of coronal loop contraction and oscillation in flares
Alexander J. B. Russell, Paulos J. A. Simoes, Lyndsay Fletcher
Context: Transverse loop oscillations and loop contractions are commonly associated with solar flares, but the two types of motion have traditionally been regarded as separate phen…
Impulsive Heating of Solar Flare Ribbons Above 10 MK
Paulo J. A. Simões, David R. Graham, Lyndsay Fletcher
The chromospheric response to the input of flare energy is marked by extended extreme ultraviolet (EUV) ribbons and hard X-ray (HXR) footpoints. These are usually explained as the…