Computer Science
Scientific paper
Nov 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984esasp.220...63s&link_type=abstract
In ESA The Hydromagnetics of the Sun p 63-66 (SEE N85-25091 14-92)
Computer Science
7
Magnetic Flux, Photosphere, Pressure Distribution, Temperature Distribution, Atmospheric Stratification, Magnetic Fields, Solar Atmosphere, Stellar Models
Scientific paper
The temperature stratifications of plage and network flux tubes are determined by comparing a large number of observed Fe I and Fe II lines with LTE model calculations. The data are also compared with profiles calculated using different empirical models. The sensitivity of the technique to changes in the temperature stratification is demonstrated. It is shown that in order to reproduce the data correctly, a sharp dip in the flux tube temperature must occur in the photosphere, where the temperatures of tube and surroundings become similar (at equal optical depth), contrary to the results of previous models. The effects of different pressure stratifications on the depths of the iron lines are discussed and it is shown that the pressure stratification giving the best agreement with the data corresponds to a rapid expansion of the tube near the height at which the temperature dip occurs.
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