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Can Thermal Nonequilibrium Explain Coronal Loops?
J. A. Klimchuk, J. T. Karpen, S. K. Antiochos
Any successful model of coronal loops must explain a number of observed properties. For warm (~ 1 MK) loops, these include: 1. excess density, 2. flat temperature profile, 3. super…
Coronal Loop Models and Those Annoying Observations!
James A. Klimchuk
It was once thought that all coronal loops are in static equilibrium, but observational and modeling developments over the past decade have shown that this is clearly not the case.…
Evidence of widespread hot plasma in a non-flaring coronal active region from Hinode/XRT
Fabio Reale, Paola Testa, James A. Klimchuk +1
Nanoflares, short and intense heat pulses within spatially unresolved magnetic strands, are now considered a leading candidate to solve the coronal heating problem. However, the fr…
Spectroscopic Observations of Hot Lines Constraining Coronal Heating in Solar Active Regions
S. Patsourakos, J. A. Klimchuk
EUV observations of warm coronal loops suggest that they are bundles of unresolved strands that are heated impulsively to high temperatures by nanoflares. The plasma would then hav…
Hinode X-Ray Telescope Detection of Hot Emission from Quiescent Active Regions: A Nanoflare Signature?
J. T. Schmelz, S. H. Saar, E. E. DeLuca +4
The X-Ray Telescope (XRT) on the Japanese/USA/UK {\it Hinode (Solar-B)} spacecraft has detected emission from a quiescent active region core that is consistent with nanoflare heati…