Astronomy and Astrophysics – Astrophysics – Solar and Stellar Astrophysics
Scientific paper
2009-04-24
Astrophys.J.713:1095-1107,2010
Astronomy and Astrophysics
Astrophysics
Solar and Stellar Astrophysics
Revised version submitted to ApJ in response to referee's comments
Scientific paper
10.1088/0004-637X/713/2/1095
The high densities, long lifetimes, and narrow emission measure distributions observed in coronal loops with apex temperatures near 1 MK are difficult to reconcile with physical models of the solar atmosphere. It has been proposed that the observed loops are actually composed of sub-resolution ``threads'' that have been heated impulsively and are cooling. We apply this heating scenario to nearly simultaneous observations of an evolving post-flare loop arcade observed with the EUVI/\textit{STEREO}, XRT/\textit{Hinode}, and \textit{TRACE} imagers and the EIS spectrometer on \textit{HINODE}. We find that it is possible to reproduce the extended loop lifetime, high electron density, and the narrow differential emission measure with a multi-thread hydrodynamic model provided that the time scale for the energy release is sufficiently short. The model, however, does not reproduce the evolution of the very high temperature emission observed with XRT. In XRT the emission appears diffuse and it may be that this discrepancy is simply due to the difficulty of isolating individual loops at these temperatures. This discrepancy may also reflect fundamental problems with our understanding of post-reconnection dynamics during the conductive cooling phase of loop evolution.
DeGiorgi Amanda M.
Kim David M.
Ugarte-Urra Ignacio
Warren Harry P.
No associations
LandOfFree
Modeling Evolving Coronal Loops with Observations from STEREO, Hinode, and TRACE does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Modeling Evolving Coronal Loops with Observations from STEREO, Hinode, and TRACE, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Modeling Evolving Coronal Loops with Observations from STEREO, Hinode, and TRACE will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-609776