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Title: Modeling active region transient brightenings observed with X-ray telescope as multi-stranded loops

Strong evidence exists that coronal loops as observed in extreme ultraviolet and soft X-rays may not be monolithic isotropic structures, but can often be more accurately modeled as bundles of independent strands. Modeling the observed active region transient brightenings (ARTBs) within this framework allows for the exploration of the energetic ramifications and characteristics of these stratified structures. Here we present a simple method of detecting and modeling ARTBs observed with the Hinode X-Ray Telescope (XRT) as groups of zero-dimensional strands, which allows us to probe parameter space to better understand the spatial and temporal dependence of strand heating in impulsively heated loops. This partially automated method can be used to analyze a large number of observations to gain a statistical insight into the parameters of coronal structures, including the number of heating events required in a given model to fit the observations. In this article, we present the methodology and demonstrate its use in detecting and modeling ARTBs in a sample data set from Hinode/XRT. These initial results show that, in general, multiple heating events are necessary to reproduce observed ARTBs, but the spatial dependence of these heating events cannot yet be established.
Authors:
;  [1] ;  [2]
  1. Department of Physics, P.O. Box 173840, Montana State University, Bozeman, MT 59717-3840 (United States)
  2. University of Glasgow, Glasgow, G128QQ, Scotland (United Kingdom)
Publication Date:
OSTI Identifier:
22356980
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 786; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; DATA ANALYSIS; EXPLORATION; EXTREME ULTRAVIOLET RADIATION; GAIN; GAMMA RADIATION; SIMULATION; SOFT X RADIATION; SPACE DEPENDENCE; SUN; TELESCOPES