Physics
Scientific paper
Nov 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975soph...45....3r&link_type=abstract
Solar Physics, vol. 45, Nov. 1975, p. 3-14.
Physics
3
Energy Spectra, Spectrum Analysis, Stellar Atmospheres, Stellar Spectra, Stellar Structure, Astronomical Models, Atmospheric Models, Data Reduction, Line Spectra, Tables (Data)
Scientific paper
A technique is discussed for obtaining information on the temperature structure of a stellar atmosphere from spectral-line data when only flux observations are available. The direct inversion of the flux integral to obtain the line source function can be circumvented by making the physically plausible assumptions of source-function equality in a multiplet and the dominance of line absorption over continuum absorption at line center. Consistency of the technique is demonstrated by treating a synthetic spectrum as input data and attempting to recover the temperature structure of the input atmosphere. Using high-quality solar-spectrum scans, the accuracy of source-function equality is demonstrated for several Fe I multiplets. One of these multiplets is used to obtain an empirical outer atmosphere for the sun. This empirical atmosphere agrees well with current solar models.
Johnson Hollis R.
Ramsey Lawrence W.
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