Stuttgart 2012 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 19: Atomic systems in external fields II

A 19.4: Vortrag

Dienstag, 13. März 2012, 14:45–15:00, V57.05

Advanced Landau expansion of atoms in neutron star magnetic fields — •Christoph Schimeczek and Günter Wunner — 1. Institut für Theoretische Physik, Universität Stuttgart, 70550 Stuttgart

Chasing the origin of still unexplained absorption features in the spectra of neutron stars with intense magnetic fields of 10⁸ T, we have developed efficient tools to describe atomic states under such conditions. By enhancing our Hartree-Fock method to a full 2D variation and introducing approximations for the electron interaction terms we can reduce the absolute error for the binding energies to below one per cent and increase the range of validity of our code towards the regime of intermediate magnetic field strengths. Furthermore, the increase in calculation time compared to simpler methods is kept very low, resulting in an extraordinary program efficiency.