Superthermic Phenomena in Stellar Atmospheres. VII. Collisional Excitation from Levels Other than the Lowest.
Abstract
The effect on the chromospheric b values of collisional excitation from other than the ground level is computed. The principal effect occurs in b1 and b2. The collisional terms place an upper limit on b2 over the case where radiative terms only were included. The resulting prediction on the population of the Balmer ground state agrees well with the value inferred from eclipse observations.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- May 1952
- DOI:
- 10.1086/145568
- Bibcode:
- 1952ApJ...115..544M