Pavel Rynkun

Dr. Pavel Rynkun is a Senior Researcher at the Institute of Theoretical Physics and Astronomy (ITPA) within the Faculty of Physics at Vilnius University. His research focuses on theoretical investigation of energy spectra and transition parameters of atoms and ions, with significant applications in astrophysics, particularly for understanding kilonovae from neutron star mergers.

Dr. Rynkun specializes in atomic data calculations, energy spectra analysis, and transition parameters for various atomic systems. His work bridges theoretical atomic physics with astrophysical applications, particularly in the context of neutron star mergers and kilonova phenomena. He has developed expertise in relativistic atomic structure calculations, multiconfiguration Dirac-Hartree-Fock methods, and perturbation theory approaches for complex atomic systems.

His publication record shows a strong focus on heavy elements, particularly lanthanides, with applications to astrophysical opacity calculations. Recent work has centered on improving atomic data for kilonovae modeling, investigating energy levels for various ionized elements (including Ce, Pr, Th, and Ba), and developing theoretical frameworks for calculating atomic properties with high precision. His research demonstrates a consistent trajectory toward more sophisticated computational methods for atomic structure calculations.

• Research Council of Lithuania scholarships (2011-2013)
• World Federation of Scientist National Scholarship stipend (2012)

Dr. Rynkun has supervised multiple student theses, serving as consultant for BSc and MSc theses at Vilnius University and the Lithuanian University of Educational Sciences. His research is well-connected internationally, with collaborations spanning multiple countries and institutions, particularly evident in his extensive publication record in high-impact astrophysics and atomic physics journals.