München 2019 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

SYPS: Symposium Extreme matter meets extreme gravity

SYPS 1: Extreme matter meets extreme gravity

SYPS 1.3: Hauptvortrag

Mittwoch, 20. März 2019, 16:10–16:40, HS 5

What can neutron-star mergers reveal about the equation of state of dense matter? — •Ingo Tews — Theoretical Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA

Neutron stars (NS) are astrophysical objects of extremes. They contain the largest reservoirs of degenerate fermions, reaching the highest densities we can observe in the cosmos, and are, thus, ideal laboratories for fundamental physics. Of particular interest for nuclear physics is the equation of state (EOS) of dense matter, probed in the NS cores. In August 2017, the first NS merger, GW170817, has been observed and provided compelling evidence that these events are an important site for the production of neutron-rich heavy elements within the r-process. In addition, GW170817 provides constraints on the NS tidal polarizability. The tidal polarizability describes how a star deforms under an external gravitational field and strongly depends on the star's compactness. Therefore, GW170817 has been used to constrain the mass-radius relationship and, hence, the EOS.

In this talk, I will use state-of-the-art calculations of the EOS, using Chiral effective field theory and advanced Quantum Monte Carlo many-body methods, and two different high-density extrapolations to address the question how GW170817 and future NS-merger observations can improve our understanding of the high-density nuclear physics probed in the cores of neutron stars.