Heidelberg 2022 – wissenschaftliches Programm

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GR: Fachverband Gravitation und Relativitätstheorie

GR 11: Relativistic Astrophysics

GR 11.1: Vortrag

Donnerstag, 24. März 2022, 11:00–11:20, GR-H2

Constraining supranuclear-dense matter with nuclear physics and multi-messenger astrophysics — •Tim Dietrich — Institute of Physics and Astronomy, University of Potsdam, Potsdam, Germany — Max Planck Institute for Gravitational Physics (Albert Einstein Institute), Potsdam, Germany

Our knowledge about dense matter explored in the cores of neutron stars remains limited. Fortunately, the detection of gravitational waves emitted from the merger of neutron stars and the corresponding electromagnetic signals allows us to place constraints on the properties of matter at supranuclear densities. Furthermore, such densities are not only probed in astrophysical observations, but also in terrestrial experiments. In this work, we use Bayesian inference to combine a large set of data from astrophysical multi-messenger observations of neutron stars and from heavy-ion collisions of gold nuclei at relativistic energies with microscopic nuclear theory calculations. Our findings show that constraints from heavy-ion collision experiments show a remarkable consistency with multi-messenger observations and provide complementary information on nuclear matter at intermediate densities. This work combines nuclear theory, nuclear experiments, and astrophysical observations from multiple messengers. Such joint analyses will be the key to shed light on the properties of neutron-rich supranuclear matter over the density range probed in neutron stars.