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Key Aspects of Coronal Heating
James A. Klimchuk
We highlight ten key aspects of coronal heating that must be understood before we can consider the problem to be solved. (1) All coronal heating is impulsive. (2) The details of co…
Emission Measure Distribution for Diffuse Regions in Solar Active Regions
Srividya Subramanian, Durgesh Tripathi, James A. Klimchuk +1
Our knowledge of the diffuse emission that encompasses active regions is very limited. In the present paper we investigate two off-limb active regions, namely AR10939 and AR10961,…
Are Chromospheric Nanoflares a Primary Source of Coronal Plasma?
J. A. Klimchuk, S. J. Bradshaw
It has been suggested that the hot plasma of the solar corona comes primarily from impulsive heating events, or nanoflares, that occur in the lower atmosphere, either in the upper…
MHD modeling of coronal loops: injection of high-speed chromospheric flows
A. Petralia, F. Reale, S. Orlando +1
Observations reveal a correspondence between chromospheric type II spicules and bright upwardly moving fronts in the corona observed in the EUV band. However, theoretical considera…
MHD modeling of coronal loops: the transition region throat
M. Guarrasi, F. Reale, S. Orlando +2
The expansion of coronal loops in the transition region may considerably influence the diagnostics of the plasma emission measure. The cross sectional area of the loops is expected…