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Emission Measure Distribution and Heating of Two Active Region CoresUsing data from the Extreme-ultraviolet Imaging Spectrometer aboard Hinode, we have studied the coronal plasma in the core of two active regions. Concentrating on the area between opposite polarity moss, we found emission measure distributions having an approximate power-law form EM/T(exp 2.4) from log T = 5.55 up to a peak at log T = 6.57. The observations are explained extremely well by a simple nanoflare model. However, in the absence of additional constraints, the observations could possibly also be explained by steady heating.
Document ID
20110008285
Acquisition Source
Goddard Space Flight Center
Document Type
Preprint (Draft being sent to journal)
Authors
Tripathi, Durgesh
(Cambridge Univ. Cambridge, United Kingdom)
Klimchuk, James A.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Mason, Helen E.
(Cambridge Univ. Cambridge, United Kingdom)
Date Acquired
August 25, 2013
Publication Date
January 1, 2011
Subject Category
Solar Physics
Distribution Limits
Public
Copyright
Public Use Permitted.
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