The Formation of Mg (I) 4571 A in the Solar Atmosphere. V. The Multi-Dimensional Structure of the Photosphere and Low Chromosphere.

摘要

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. Output intensities are compared with observed rms intensity fluctuations and spatially-averaged intensities in Mg I 4571 A. We find that at least one model (with a height-independent temperature fluctuation Delta T/T = + or - 0.02 in the range 0 < or = h < or = 450 km) can predict the magnitude of the intensity fluctuations in both the continuum and lamba 4571 A. The asymmetry of the line can be explained by adding a height-independent, temperature-correlated flow of amplitude 1 to 2 km/s. The relationship between these results and other multi-dimensional analyses is discussed.