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.
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On leave from Department of Applied Mathematics, University of Sydney, Sydney, Australia.
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Altrock, R.C., Cannon, C.J. The Formation of MgI 4571 Å in the solar atmosphere. Sol Phys 42, 289–302 (1975). https://doi.org/10.1007/BF00149912
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DOI: https://doi.org/10.1007/BF00149912