Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.14279/2189
Title: Evolution of a Coronal Loop System
Authors: Tsiropoula, Georgia 
Tziotziou, Kostas 
Wiegelmann, Thomas 
Zachariadis, Theodoros 
Gontikakis, Costis 
Dara, Helen C. 
Major Field of Science: Engineering and Technology
Keywords: Sun: transition region;Sun: loops;Sun: UV radiation
Issue Date: 1-Mar-2007
Source: , 2007, vol. 240, no. 1, pp. 37-48.
Volume: 240
Issue: 1
Start page: 37
End page: 48
Journal: Solar Physics 
Abstract: The temporal variation of a loop system that appears to be changing rapidly is examined. The analyzed data were obtained on 15 May 1999, with the Transition Region and Coronal Explorer (TRACE) during an observing campaign and consist of observations in the Fe ix/Fe x 171 Å and Fe xii 195 Å passbands taken at a cadence of ∼10 min. The special interest in this loop system is that it looks like one expanding loop; however, careful examination reveals that the loop consists of several strands and that new loop strands become visible successively at higher altitudes and lower loop strands fade out during the one hour of our observations. These strands have different widths, densities, and temperatures and are most probably consisting of, at least, a few unresolved thinner threads. Several geometric and physical parameters are derived for two of the strands and an effort is made to determine their 3D structure based on the extrapolation of the magnetic field lines. Electron density estimates allow us to derive radiative and conductive cooling times and to conclude that these loop strands are cooling by radiation.
URI: https://hdl.handle.net/20.500.14279/2189
ISSN: 1573093X
DOI: 10.1007/s11207-006-0247-6
Rights: © Springer
Type: Article
Affiliation: Academy of Athens 
Affiliation : Academy of Athens 
Publication Type: Peer Reviewed
Appears in Collections:Άρθρα/Articles

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