Sep 26 – 28, 2018
Department of Physics (University of Coimbra)
Europe/Lisbon timezone

Constraining the nuclear matter EoS from the GW170817 merger event

Sep 26, 2018, 12:00 PM
20m
Room E10A

Room E10A

Speaker

Jinbiao Wei (INFN - National Institute for Nuclear Physics)

Description

The observation of NS allows us to constrain the equation of state(Eos) of the dense matter well beyond the densities available in earth laboratories. For example, observations of the NS mass-radius relation and the mass–moment-of-inertia relation can be used to infer the NS Eos within a certain uncertainty. However, the mass of several NS are known with good precision but their radii still suffer from large uncertainty which leads to a weaker constraint on Eos. The recent observation of gravitational waves GW170817, and its electromagnetic counterparts allows us to constrain the dense matter Eos in new and complementary ways. The upper limit of the tidal deformability is put on by the merger event and the lower limit by the kilonova AT2017gfo signal. This translates into an allowed window for the radius of the 1.4Mo stellar configuration between∼11.5 and 13. 5km. In this case, we calculate neutron star’s moment of inertia and tidal deformability using various microscopic Eos which are derived based on two- and three-body realistic nucleon interaction for nuclear and hybrid star configurations. We show that they are fully compatible with constraints imposed by interpretation of the first observed neutron-star merger event.

Primary author

Fiorella Burgio (INFN Sezione di Catania)

Co-authors

Alessandro Drago giuseppe pagliara Hans Josef Schulze (CT) Jinbiao Wei (INFN - National Institute for Nuclear Physics)

Presentation materials