Photospheric Temperatures from Ca IIH
Abstract
The temperature stratification in the upper photosphere can be extracted from Ca II H&K spectrograms following Shine and Linsky (1974) by assuming LTE, the Eddington-Barbier approximation, hydrostatic equilibrium, and that Ca II is mostly in the ground state. Rouppe van der Voort (2002) confirmed that these assumptions were solid for a wide range in the Ca IIK wings and further developed the method including forward computation using MULTI (Carlsson 1986).
- Publication:
-
Magnetic Coupling between the Interior and Atmosphere of the Sun
- Pub Date:
- 2010
- DOI:
- 10.1007/978-3-642-02859-5_74
- Bibcode:
- 2010ASSP...19..511H
- Keywords:
-
- Physics