Comparing Active Region Plasma Parameters Using Differential Emission Measure Techniques

Details Comparing Active Region Plasma Parameters Using Differential Emission Measure Techniques Comparing Active Region Plasma Parameters Using Differential Emission Measure Techniques

May 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agusm..sh41b22w&link_type=abstract

American Geophysical Union, Spring Meeting 2001, abstract #SH41B-22

Other

7509 Corona, 7549 Ultraviolet Emissions, 7554 X Rays, Gamma Rays, And Neutrinos

Scientific paper

In order to study solar active regions and the processes that drive them, it is necessary to accurately describe the elemental abundances, electron densities, and temperature distributions of the emitting plasma. The best way to determine these vital parameters is with multi-thermal analysis techniques, which have fewer initial assumptions than their isothermal counterparts. The reliability of these emission measure distributions depends on spectroscopic observations of a large sample of emitting ions over a wide temperature range. The Solar EUV Rocket Telescope and Spectrograph (SERTS) is well suited for studying multi-thermal coronal structures. It provides observations of numerous emission lines with excellent spectral resolution. Simultaneous observations taken with the Soft X-ray Telescope were combined with the SERTS data in order to constrain the high-temperature end of the multi-thermal distribution. Three active regions (AR 7563, AR 7870, and AR 8108) observed with both instruments were chosen for this investigation. The results of our analysis show how certain plasma parameters -- emission measure distributions, electron densities, and elemental abundances -- vary from region to region.

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