Hydrostatic Modelling of Active Region EUV and X-ray Emission

Details Hydrostatic Modelling of Active Region EUV and X-ray Emission Hydrostatic Modelling of Active Region EUV and X-ray Emission

Sep 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008espm...12.3.65d&link_type=abstract

"12th European Solar Physics Meeting, Freiburg, Germany, held September, 8-12, 2008. Online at http://espm.kis.uni-freiburg.de/,

Physics

Scientific paper

The hydrostatic modeling of active region NOAA 10963 coronal EUV and X-ray emission is presented. The model considers three-dimensional magnetic field structure obtained by the extraplation of the longitudinal magnetogram in potential or linear force-free approximation. We derived new scaling laws for loop apex temperature and footpoint pressure as functions of loop length, volumetric heating rate and heating scale height. These scaling laws assume a power-law dependency of radiative loss function on the temperature, a power-law dependency of the heating function on the loop length and field strength at the loop base. The scaling laws are applied to the results of the field extrapolations in AR NOAA 10963 in order to calculate the temperature and density distributions in the active region corona. The functions of filter response to emissivity has been calculated by using the CHIANTI atomic database. Unlike previous authors, we are able to get emitting loop structures in EUV. The results show that the heating scale height plays important role in modeling of the active region emission. The computed emission is compared with observations and the implications on the heating function are discussed.

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