Radiative transfer in resonance-multiplet lines

Details Radiative transfer in resonance-multiplet lines Radiative transfer in resonance-multiplet lines

Feb 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977azh....54..162n&link_type=abstract

Astronomicheskii Zhurnal, vol. 54, no. 1, 1977, p. 162-168. In Russian.

Astronomy and Astrophysics

Astronomy

2

Atomic Spectra, Emission Spectra, Fine Structure, Line Spectra, Radiative Transfer, Asymptotic Methods, Atomic Energy Levels, Maxwell-Boltzmann Density Function, Oxygen Spectra, Resonance, Voigt Effect

Scientific paper

The formation of resonance-multiplet lines with a common upper level in a semi-infinite medium is analyzed. An analytical method developed for two-level atoms is used, a Boltzmann distribution of the atomic population in lower-level sublevels is assumed along with full frequency redistribution within each line, and emission-line intensity is expressed in terms of Boltzmann's H-function. Asymptotic and approximate formulas for the H-function are obtained for Doppler as well as Voight absorption coefficients. The Doppler H-function is computed, and the accuracy of the asymptotic solution is evaluated, for the case of the solar O I resonance triplet.

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