Advances in atomic theory of heavy elements for neutron star merges

Lanthanides and actinides play an important role in understanding of neutron star merger events. Calculating opacities for these heavy elements is a challenging task. Reliable benchmarks for atomic transition properties are urgently needed. I will report on recent advances in first-principle atomic theory of lanthanides and actinides and development of online portal for high-precision atomic data for needs of atomic, astrophysics, and plasma physics communities.