München 2019 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 51: Nuclear Astrophysics IV

HK 51.1: Group Report

Thursday, March 21, 2019, 14:00–14:30, HS 18

Nuclear Pasta Matter in the Intermediate Density Regime — •Bastian Schuetrumpf and Gabriel Martínez-Pinedo — GSI Helmholzzentrum für Schwerionenforschung, Planckstraße 1, 64291 Darmstadt, Germany

Nuclear matter as present on earth in the center of atoms is almost isotropic with a central density of the nuclear saturation density. This changes drastically in astrophysical environments such as neutron stars or core-collapse supernova. In particular, in the inner crust of neutron stars at sub-saturation densities (10% - 80% of saturation density), nucleonic matter is expected to form complex structures commonly referred to as "pasta" phases. Because of high densities at macroscopic dimensions, pasta phases represent a unique environment, which is not present on earth and cannot be recreated in the laboratory.

In my talk I will focus on density functional theory calculations of different topologies of nuclear pasta matter and its properties, such as the static structure factor which quantifies the influence e.g. on neutrino opacity. In detail I will present the slab configuration as well a several minimal surface configuration. It turns out that the binding energy per nucleon is very similar for all configurations. In contrast, the properties of the different configurations are very divers.