Collision strength dependence of solar emission lines from carbon- and nitrogen-like ions

Details Collision strength dependence of solar emission lines from carbon- and nitrogen-like ions Collision strength dependence of solar emission lines from carbon- and nitrogen-like ions

Jul 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986ap%26ss.124..131c&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 124, no. 1, July 1986, p. 131-136.

Astronomy and Astrophysics

Astrophysics

Collision Parameters, Emission Spectra, Ionic Collisions, Solar Spectra, Carbon, Nitrogen Ions, Radiative Transfer, Solar Atmosphere, Stellar Temperature

Scientific paper

The author has calculated the normalized populations of ground and first excited state levels in carbon- and nitrogen-like ions in an optically thin medium, under steady conditions, by using: (1) the incident electron energy dependent collision strengths and (2) the constant collision strength (CCS) values at the incident electron energy Earcmin. The assumption of CCS affects the line-intensity ratio within the observational uncertainties. It is concluded that to calculate the intensity ratios for solar lines one can alternatively use CCS at electron energy Earcmin.

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