Program INTRAT - INTensity RATios for hydrogenic recombination lines (FORTRAN 77)
The Fortran program INTRAT computes INTensity RATios of hydrogenic recombination lines for specified transitions at temperatures and densities. It uses the 2-D linear or logarithmic interpolation of atomic data over temperatures and densities to calculate line emissivities and total recombination coefficients for hydrogenic ions with Z≤8.
There are 16 atomic data files labelled eZC.d, where Z=1,2,..,8 is the ionic charge and C=a or b is the Case in the sense of Baker and Menzel (1938), which contain emissivities and total recombination coefficients of all hydrogenic ions through oxygen. Output appears also in file intratZC.d.
CGS units are used, meaning that densities are expressed in cm-3, temperatures in K, emissivities in erg.s-1.cm-3, and recombination coefficients in cm3.s-1.
P. J. Storey, & D. G. Hummer, Recombination line intensities for hydrogenic ions-IV. Total recombination coefficients and machine-readable tables for Z=1 to 8, MNRAS, 272, 41, 1995
P. J. Storey, & D. G. Hummer, VizieR Online Data Catalog: Recombination line intensities for hydrogenic ions, VizieR Online Data Catalog, 6064, 1995