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Comparative Simulation of Cosmic Element Abundances with Excited Ion Levels

Explore the impact of excited ion levels on cosmic element abundances using CNO models. Simulation run2_gs shifts focus to cosmic abundances for in-depth analysis. Investigate the significance of excited levels alongside ionization stages C, N, and O. Initial results show minor differences compared to ground-states-only model. Further tests and adjustments are recommended to refine simulations.

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Comparative Simulation of Cosmic Element Abundances with Excited Ion Levels

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  1. The previous simulation – run1_gs – used the 15 most cosmically abundant elements, but in equal fractions; atomic models were ground states only for all ion stages; 20000 K plasma temperature, 30000 K radiation and spectral temperatures; ion density 1e10. The next simulation – run2_gs – uses the cosmic abundances at: http://dosxx.colorado.edu/~bagenal/1010/graphics/CosmicAbund.html; but ever other setting is the same.

  2. Next, we’ll test the importance of including excited levels. We’ll use different CNO models, with one n=2 level and one n=3 level (or so) for the two most abundant ionization stages for each of the elements: C: +3, +4 N: +3, +4 O: +2, +3 One ion stage atm selection is shown for each element on the following three slides Run/workspace is called run1_few_excited

  3. The populations in those excited levels is tiny…

  4. Looks very, very similar to the ground-states only model (run2_gs) – except for the lines; maybe should choose b-f in the ‘output’ screen of the workspace.

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