At the present time, the list contains two titles, both dedicated to solar prominence modelling. To browse a file, click on the corresponding name. PROM4 is designed to compute simple models of solar prominences. The models consist of plane-parallel slabs standing vertically above the solar surface. It solves the equations of radiative transfer, statistical equilibrium, ionization and pressure equilibria, and computes electron and hydrogen level populations and hydrogen line profiles.
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PROM5 is similar to PROM4, but deals with prominence models whose physical properties are varying across the plane-parallel slab which represents the prominence. Otherwise, negative or zero optical thicknesses would appear in the computations, causing execution failure. It is surrounded by an interface whose temperature increases from 10000 to 100000 K over 3500 km. However, this precaution is not sufficient to insure convergence in all cases. Sometimes, the convergence may be recovered by a modification of the depth mesh.