The interpretation of center-limb profiles of weak Fraunhofer lines
Abstract
Profiles of weak Fraunhofer lines have been analyzed under the assumption that nonthermal broadening and asymmetry of the lines are caused by wave and convective motions. A comparison of computed and observed line profiles shows that a horizontal flow with a velocity of 2.7 km/s exists on the major part of the sun's surface. The upflow velocity is 0.9 km/s, and the granule-intergranule temperature difference is about 330 K.
- Publication:
-
Astronomicheskii Zhurnal
- Pub Date:
- June 1981
- Bibcode:
- 1981AZh....58..604K
- Keywords:
-
- Fraunhofer Lines;
- Photosphere;
- Solar Atmosphere;
- Solar Spectra;
- Asymmetry;
- Convection;
- Solar Physics