Observed Facula Line Profiles and Contrasts, Comparison with Models
Abstract
Summary. Profiles of magnetically insensitive lines are measured together with contrasts in real continuum windows for solar facula regions at different positions on the disc with a spatial resolution of about 3". The contrast measurements earlier observations (Fig. 1); the line profiles show the "rest-intensity effect" (discussed in a previous paper) to decrease towards the limb (Fig. 2). Calculations with a number of reasonable facula models indicate that a homogeneous LTE model fails to represent simultaneously the observed contrasts and line profiles, without further assumptions. Key words: facula models
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- November 1973
- Bibcode:
- 1973A&A....29...13S