The Source Function in a Non-Equilibrium Atmosphere. V. Character of the Selfreversed Emission FO CA^{+} H and K.
Abstract
The methodology of Paper III is applied to delineate the principal parameters affecting the characteristics of the self-reversed emission cores of Ca+ H and K, in order to clarify whether current discussions in terms only of are adequate. We find two additional factors to be significant-c and the Te gradient. The factor E provides an effect in the correct direction to interpret the Wilson-Bappu effect, but of too small a size, subject to a more complete treatment of the region outside the Doppler core. The effect of the T6 gradient seems more significant, particularly as a basis for interpreting the observed solar variations.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- May 1960
- DOI:
- 10.1086/146882
- Bibcode:
- 1960ApJ...131..695J