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Bochum 2009 – scientific programme

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HK: Fachverband Hadronen und Kerne

HK 73: Nuclear Astrophysics

HK 73.1: Group Report

Thursday, March 19, 2009, 16:30–17:00, H-ZO 60

A Supernovae Equation of State with Light and Heavy Clusters — •Stefan Typel1, 2, Gerd Röpke3, Thomas Klähn4, David Blaschke5, and Hermann Wolter61Excellence Cluster Universe, TU München — 2GSI Darmstadt — 3Uni Rostock — 4Argonne National Laboratory — 5Uni Wrocław — 6LMU München

The equation of state of dense matter is an essential ingredient in astrophysical models of supernovae and compact stars. At densities below nuclear saturation and not too high temperatures, many-body correlations have a considerable impact on the thermodynamical properties. The appearance of light and heavy clusters changes the chemical composition of the system. Combining a relativistic mean-field model with density-dependent couplings and a generalized Beth-Uhlenbeck approach, it is possible to describe the dissolution of the clusters with increasing density and temperature in a microscopic, self-consistent model. The parameters can be constrained by properties of finite nuclei, neutron stars and heavy-ion collisions. Particular attention is paid to the thermodynamical consistency and the construction of phase transitions.

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