N IV line ratios in the sun

Details N IV line ratios in the sun N IV line ratios in the sun

Apr 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990soph..126..311k&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 126, April 1990, p. 311-317. Research supported by SERC.

Physics

8

Line Spectra, Nitrogen Ions, Solar Spectra, Emission Spectra, Isoelectronic Sequence

Scientific paper

Theoretical N IV emission line ratios are presented for R(1) = I(923.2 A)/I(765.1 A) and R(2) = I(1718.6 A)/I(1486.5 A), which are electron density and temperature sensitive, respectively. A comparison of R(1) with observational data for several solar features obtained with the Harvard S-055 spectrometer on Skylab reveals generally good agreement between theory and observation. The observed value of R(2), determined from a quiet-sun spectrum obtained by the S082-B spectrograph on Skylab, implies an electron temperature in excellent agreement with that of maximum N IV fractional abundance in ionization equilibrium, which provides observational support for the accuracy of the diagnostic calculations.

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