Exotic matter produced in neutron-star mergers

by Prof. Veronica Dexheimer (Kent State University)

Tuesday 12 Jan 2021, 18:30 → 20:30 Asia/Tehran

Online

Webinar on Quark Matter and Relativistic Hydrodynamics

Abstract:

Neutron stars are the most dense objects in our universe that we can directly observed. In their cores, different particles from the ones present in atomic nuclei, protons and neutrons, can exist. These particles are hyperons, that contain non-zero strangeness, and possibly quarks, some of them also strange. In the extreme case that neutron stars merge, the density increases even further to possibly more than 10 times the density of atomic nuclei. In addition, the temperature in mergers can be much higher than the one generated in the supernova explosions that create neutron stars, approaching the temperatures generated in energetic particle collisions. Under these conditions, a large amount of strangeness Ys and, more specifically, quark strangeness Ys-quark can be created. As a consequence, a possible strong phase transition can lead to a post-merger gravitational-wave signal considerably different from the one expected from the inspiral and to an anticipated collapse of the merged object. 

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