Berlin 2014 – wissenschaftliches Programm

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EP: Fachverband Extraterrestrische Physik

EP 5: Postersitzung

EP 5.1: Poster

Dienstag, 18. März 2014, 16:30–18:30, DO24 Foyer

Moving hydrogen in neutron star magnetic fields — •Thorsten Kersting and Günter Wunner — Institut für Theoretische Physik 1, Universität Stuttgart

In recent years, significant improvements in numerical calculations of atoms in neutron star magnetic fields have led to the possibility of producing a huge amount of atomic data, which can serve as a basis for modeling neutron star atmospheres. To calculate the quantity of interest, i.e. the opacity, from cross sections and dipole strengths, it is necessary to consider broadening effects due to effects of the hot plasma in the neutron star atmosphere. The largest broadening effect for atoms in neutron star magnetic fields is the motion of the atoms perpendicular to the magnetic field (motional Stark effect). For hydrogen we calculate the energy shift due to this motional Stark effect. We work in center of mass and relative coordinates and expand the wavefunction in a 2D B-Spline basis. Additionally the cylindrical symmetry is lost and we also have to expand in basis functions with different magnetic quantum numbers.