A test of the micro-macroturbulence model on the solar flux spectrum.
Abstract
The micro-macroturbulence model of velocity fields is applied to 20 lines taken from a solar flux spectrum obtained with high photometric precision and high spectral resolution. The analysis is performed first by adopting a value of 1.9 km/s for the sun's rotational velocity and then by treating the rotational velocity as an unknown. The results obtained are compared with those of previous intensity profile analyses. It is concluded that if the sun were seen as a distant (unresolved) star, it would be interpreted as having a classical microturbulence dispersion of 0.5 + or - 0.1 km/s along with a radial-tangential macroturbulence characterized by a dispersion of 3.1 + or - 0.1 km/s.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- December 1977
- DOI:
- 10.1086/155706
- Bibcode:
- 1977ApJ...218..530G
- Keywords:
-
- Magnetohydrodynamic Turbulence;
- Solar Flux;
- Solar Spectra;
- Stellar Models;
- Microstructure;
- Solar Rotation;
- Stellar Spectrophotometry;
- Solar Physics