Electron density diagnostics for gaseous nebulae involving the O 4 intercombination lines near 1400 A

Details Electron density diagnostics for gaseous nebulae involving the O 4 intercombination lines near 1400 A Electron density diagnostics for gaseous nebulae involving the O 4 intercombination lines near 1400 A

Nov 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992stin...9314762k&link_type=abstract

In Ohio State Univ., Atomic Data and Spectral Analysis of Carbon, Nitrogen, Oxygen and Silicons Observed with the International

Other

Collision Rates, Cosmic Gases, Electron Density (Concentration), Electron Impact, Emission Spectra, Planetary Nebulae, Astronomical Spectroscopy, Atomic Excitations, Iue, Line Spectra

Scientific paper

Theoretical O IV electron density sensitive emission line ratios, determined using electron impact excitation rates calculated with the R-matrix code, are presented for R1 = I(1407.4 A)/I(1401.2 A), R2 = I(1404.8 A)/I(1401.2A), R3 = I(1399.8 A)/(1401.2 A), and R4 = I(1397.2 A)/I(1401.2 A). The observed values of R1-R4, measured from high resolution spectra obtained with the International Ultraviolet Explorer (IUE) satellite, lead to electron densities that are compatible, and which are also in good agreement with those deduced from line ratios in other species. This provides observational support for the accuracy of the atomic data adopted in the present calculations.

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