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The Formation of MgI 4571 Å in the solar atmosphere

✍ Scribed by Richard C. Altrock; C. J. Cannon

Publisher
Springer
Year
1975
Tongue
English
Weight
755 KB
Volume
42
Category
Article
ISSN
0038-0938

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✦ Synopsis

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 A. We find that at least one model (with a heightindependent temperature fluctuation A T/T= zk 0.02 in the range 0 ~< h ~< 450 kin) can predict the magnitude of the intensity fluctuations in both the continuum and 24571 A. 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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