München 2006 – wissenschaftliches Programm

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HK: Physik der Hadronen und Kerne

HK 44: Kern- und Teilchen-Astrophysik

HK 44.2: Vortrag

Donnerstag, 23. März 2006, 14:15–14:30, E

The outer crust of non-accreting cold neutron stars — •Matthias Hempel, Stefan Rüster, and Jürgen Schaffner-Bielich — Institut für Theoretische Physik, J. W. Goethe-Universität, Max von Laue-Str. 1, D-60438 Frankfurt am Main, Germany

The outer crust of non-accreting cold neutron stars is studied in the framework of modern nuclear mass models. A comparison to the classic work of Baym, Pethick, and Sutherland (BPS) and an update of the work by Haensel and Pichon is performed. The most recent experimental nuclear data from the atomic mass table of Audi, Wapstra, and Thibault from 2003 is taken. Extrapolation to the dripline is utilized by different theoretical nuclear models: relativistic mean-field models and non-relativistic Hartree-Fock-Bogoliubov (HFB) models based on Skyrme parametrization with and without effects from deformation. The different nuclear models are compared to check their differences with respect to the neutron dripline, magic numbers, equation of state and occurences of nuclei in the outer crust.