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A nanoflare based cellular automaton model and the observed properties of the coronal plasma View all abstracts by submitter

Marcelo Lopez-Fuentes   Submitted: 2016-08-04 12:21

We use the cellular automaton model described in L\'opez Fuentes & Klimchuk (2015, ApJ, 799, 128) to study the evolution of coronal loop plasmas. The model, based on the idea of a critical misalignment angle in tangled magnetic fields, produces nanoflares of varying frequency with respect to the plasma cooling time. We compare the results of the model with active region (AR) observations obtained with the Hinode/XRT and SDO/AIA instruments. The comparison is based on the statistical properties of synthetic and observed loop lightcurves. Our results show that the model reproduces the main observational characteristics of the evolution of the plasma in AR coronal loops. The typical intensity fluctuations have an amplitude of 10 to 15% both for the model and the observations. The sign of the skewness of the intensity distributions indicates the presence of cooling plasma in the loops. We also study the emission measure (EM) distribution predicted by the model and obtain slopes in log(EM) versus log(T) between 2.7 and 4.3, in agreement with published observational values.

Authors: M. López Fuentes, J.A. Klimchuk
Projects: None

Publication Status: Accepted for publication in ApJ
Last Modified: 2016-08-05 15:28
Go to main E-Print page  The emergence of braided magnetic fields  Two-dimensional cellular automaton model for the evolution of active region coronal plasmas  Edit Entry  Download Preprint  Submitter's Homepage Delete Entry 

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