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Large-scale calculations of atomic structures and radiative properties havebeen carried out for singly, doubly- and trebly ionized cerium. For thispurpose, the purely relativistic multiconfiguration Dirac-Hartree-Fock (MCDHF)method was used, taking into account the effects of valence-valence andcore-valence electronic correlations in detail. The results obtained were thenused to calculate the expansion opacities characterizing the kilonovae observedas a result of neutron star mergers. Comparisons with previously publishedexperimental and theoretical studies have shown that the results presented inthis work are the most complete currently available, in terms of quantity andquality, concerning the atomic data and monochromatic opacities for Ce II, CeIII and Ce IV ions.

monthly notices of the royal astronomical society

Radiative rates and opacity calculations in Ce II-IV Multiconfiguration  Dirac-Hartree-Fock radiative parameters for emission lines in Ce II-IV ions  and cerium opacity calculations for kilonovae