Effect of a progressive sound wave on the profiles of spectral lines. 2: Asymmetry of faint Fraunhofer lines
Abstract
The absorption coefficient profile was calculated for lines of different chemical elements in a medium with progressive sound waves. Calculations show that (1) the degree and direction of asymmetry depend on the atomic ionization potential and the potential of lower level excitation of the individual line; (2) the degree of asymmetry of a line decreases from the center toward the limb of the solar disc; and (3) turbulent motions 'suppress' the asymmetry.
- Publication:
-
Astrometrics and Astrophysics
- Pub Date:
- December 1974
- Bibcode:
- 1974amap.nasa...56K
- Keywords:
-
- Absorption Spectra;
- Fraunhofer Lines;
- Sound Waves;
- Spectral Line Width;
- Symmetry;
- Absorptivity;
- Ionization Potentials;
- Photosphere;
- Sun;
- Turbulence Effects;
- Wave Propagation;
- Solar Physics