The Formation of Mg I 4571 Å in the Solar Atmosphere. V: The Multi-Dimensional Structure of the Photosphere and Low Chromosphere
Abstract
The two-dimensional equation of transfer is solved for the case of locally-controlled source function (LTE) and radiationally-controlled ionization. Horizontal fluctuations in electron temperature and macroscopic velocity fields are superposed on the basic one-dimensional model (cf. Altrock and Cannon, 1972). Output intensities are compared with observed rms intensity fluctuations and spatially-averaged intensities in Mg I 4571 Å. We find that at least one model (with a height-independent temperature fluctuation ΔT/T=±0.02 in the range 0⩽h⩽450 km) can predict the magnitude of the intensity fluctuations in both the continuum and λ4571 Å. The asymmetry of the line can be explained by adding a height-independent, temperature-correlated flow of amplitude 1 to 2 km s−1. The relationship between these results and other multi-dimensional analyses is discussed.
- Publication:
-
Solar Physics
- Pub Date:
- June 1975
- DOI:
- 10.1007/BF00149912
- Bibcode:
- 1975SoPh...42..289A
- Keywords:
-
- Atmospheric Models;
- Chromosphere;
- Line Spectra;
- Magnesium;
- Photosphere;
- Solar Atmosphere;
- Absorption Spectra;
- Atmospheric Composition;
- Electron Energy;
- Flow Velocity;
- Graphs (Charts);
- Nonlinear Equations;
- Radiative Transfer;
- Solar Spectra;
- Temperature Gradients;
- Two Dimensional Flow;
- Velocity Distribution;
- Solar Physics;
- Atmosphere;
- Velocity Field;
- Electron Temperature;
- Temperature Fluctuation;
- Solar Atmosphere