Dynamics of flaring loops. III - Interpretation of flare evolution in the emission measure-temperature diagram

Details Dynamics of flaring loops. III - Interpretation of flare evolution in the emission measure-temperature diagram Dynamics of flaring loops. III - Interpretation of flare evolution in the emission measure-temperature diagram

Jan 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26a...267..586s&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 267, no. 2, p. 586-594.

Astronomy and Astrophysics

Astrophysics

48

Coronal Loops, Plasma Heating, Solar Flares, X Ray Spectra, Astronomical Spectroscopy, Solar Spectra, Spectral Bands

Scientific paper

The aim of the paper is to illustrate the application of the density-temperature diagrams discussed by Jakimiec (1992) to interpretation of soft X-ray measurements, namely, calcium spectra recorded by the Solar Maximum Mission Bent Crystal Spectrometer. Using the emission measure and the temperature values derived for a set of hydrodynamic flare models discussed in previous papers, we have obtained and analyzed the (sq rt epsilon-T) counterparts of the (N-T) diagrams. Inspection of these diagrams reveals that they qualitatively resemble the (N-T) diagrams. The inclinations of the decay trajectories make the main difference. Next, we have performed a comparison of the modeled and observed flare evolutionary trajectories. This comparison allowed us to identify characteristic cases of evolution during the decay phase. We have discussed time variations of the heating rate for selected observed flares. The results of this paper illustrate how to use the diagnostic diagrams in the interpretation of flare soft X-ray measurements.

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