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| Paper: |
The Circumstellar Shell of the Post-AGB Star IRAS 22272+5435 |
| Volume: |
378, Why Galaxies Care About AGB Stars: Their Importance as Actors and Probes |
| Page: |
339 |
| Authors: |
Schmidt, M.R.; Zacs, L.; Pulecka, M.; Szczerba, R.; Musaev, F. |
| Abstract: |
We have analysed optical spectra of the carbon-rich post-AGB star IRAS 22272+5435. The circumstellar components of molecular lines of CN (Red System) and C2 (Phillips and Swan bands) were identified and measured. The mechanism of excitation of the rotational levels of the ground electronic states of CN and C2 was analysed with a non-LTE code. An empirical model accounting for the observed spectral energy distribution was used as the physical model of the shell. An extensive chemical model was constructed based on the elemental abundances obtained from the analysis of optical atomic lines. |
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