Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...254..780v&link_type=abstract
Astrophysical Journal, Part 1, vol. 254, Mar. 15, 1982, p. 780-795.
Astronomy and Astrophysics
Astrophysics
30
Computerized Simulation, Line Shape, Radiative Transfer, Resonant Frequencies, Solar Prominences, Thermodynamic Equilibrium, Atmospheric Models, Chromosphere, Lyman Alpha Radiation, Radial Velocity
Scientific paper
The two-dimensional transfer code of Mihalas, Auer and Mihalas (1978) is used to compute emergent profiles of resonance lines of H I, Mg II, and Ca II. The model (a uniform slab limited in two directions) and the radiative and thermodynamic quantities are described. The metallic line profiles are sensitive to the ionization degree, which is fixed at a certain value. Some modifications are implemented in the code, in particular, the true incident profiles of chromospheric lines. A comparison is made between two-dimensional and one-dimensional profiles. Good agreement between computed and observed profiles is found for Ly-alpha and Ca II but not for Mg II lines.
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