Molecular opacities of astrophysical interest - The A2Pi-X2Sigma(+) system of CN.
Abstract
The A2Pi-X2Sigma(+) system of CN, calculated for all the isotopes including C-12, C-13, N-14 and N-15 and based on recent theoretical and experimental data, is presented. Partition functions, opacity distribution functions, and model atmospheres were created. The importance of the different groups of transitions in the molecule and all the weak bands/lines is considered; the transitions from more than 99 percent of the total population of the molecule are also taken into account. It is concluded that the inclusion of the opacity from the C-12N-15 and C-13N-15 isotopes is smaller than the effect of changing the microturbulence from 2.2 to 2.7 km/s or changing the C-12/C-13 ratio from 4.5 to 43.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- November 1990
- Bibcode:
- 1990A&A...238..424J
- Keywords:
-
- Absorption Spectra;
- Cn Emission;
- Cosmochemistry;
- Opacity;
- Stellar Atmospheres;
- Carbon Isotopes;
- Carbon Stars;
- Nitrogen Isotopes;
- Radiative Lifetime;
- Atomic and Molecular Physics