Reflionx - reflection by a constant density illuminated atmosphere
The emergent ("reflected") spectrum is calculated for an optically-thick atmosphere (such as the surface of an accretion disk) of constant density illuminated by radiation with a power-law spectrum. The illumination has a high-energy exponential cutoff with e-folding energy fixed at 300 keV and a sharp lower energy cutoff at 0.1 keV. The reflected spectrum is calculated over the range 1 eV to 1 MeV. Non-LTE calculations provide temperature and ionization structures for the gas that are consistent with the local radiation fields. In addition to fully-ionized species, the following ions are included in the calculations: C III-VI, N III-VII, O III-VIII, Ne III-X, Mg III-XII, Si IV-XIV, S IV-XVI, and Fe VI-XXVI.
Note that the physical situation is similar to that in the "constant density ionised disc models". The calculations in the new model include a much broader range of elements and energetically-important ionization states.
Keith Arnaud, Lab. for High Energy Astrophysics, NASA/Goddard Space Flight Center
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