Observational evidence for non-equilibrium ionization in the solar corona

Details Observational evidence for non-equilibrium ionization in the solar corona Observational evidence for non-equilibrium ionization in the solar corona

Oct 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994ssrv...70..207s&link_type=abstract

Space Science Reviews, Volume 70, Issue 1-2, pp. 207-209

Computer Science

1

Sun, Corona, Euv Lines

Scientific paper

We investigate whether temperature sensitive EUV line ratios can be used as observational signatures for the presence of non-equilibrium ionization in transition region plasma. We compute the total intensity of some EUV lines of carbon and oxygen expected from coronal loop models with a steady-state flow and which are known to have significant departures from ionization equilibrium, selecting lines whose intensity ratios are useful for deducing the electron temperature in the coronal plasma. We calculate the intensity ratios with and without the approximation of ionization equilibrium, in order to determine the effects of any deviations from equilibrium on the numerical values of the line ratios examined.

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