Astronomy and Astrophysics – Astronomy
Scientific paper
May 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...210.9104w&link_type=abstract
American Astronomical Society Meeting 210, #91.04; Bulletin of the American Astronomical Society, Vol. 39, p.204
Astronomy and Astrophysics
Astronomy
Scientific paper
Most previous work on the coronal heating problem has focused on the observation and simulation of individual loops. The recent proliferation of high speed, multi-processor computers has made it possible to simulate large ensembles of loops and consider the emission from entire active regions using both steady and impulsive heating models. In this paper we present simulations of AR8156, which was observed by SXT and EIT in many filters. We model this region by coupling potential field extrapolations to full solutions of the 1D hydrodynamic loop equations using both steady and impulsive heating scenarios. The steady heating model is able to reproduce the total intensity and general morphology of the soft X-ray emission observed in four SXT filters. The steady models, however, cannot reproduce the loop emission observed at lower temperatures. Using the steady heating rate for each field line as the basis for an impulsive heating scenario we find that the time-dependent modeling is able to reproduce both the high temperature emission and many, but not all, features of the emission at lower temperatures. We will also discuss how new observations from Hinode will greatly improve the observational constraints on the coronal heating problem.
Warren Harry
Winebarger Amy R.
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