Conveners
Modeling of binary neutron star and black hole-neutron star mergers, and of their electromagnetic counterparts: Tuesday block 2
- Albino Perego (University of Trento)
- Oleg Korobkin (Los Alamos National Laboratory)
Description
The recent detections in gravitational waves of binary neutron star and black hole-neutron star mergers have confirmed their relevance both from an astrophysical and a fundamental physics perspective. Additionally, GW170817 confirmed that compact binary mergers could be primary sites for r-process nucleosynthesis and the central engine of electromagnetic counterparts, including kilonovae and gamma-ray bursts. The detailed modeling of the mergers represents an open challenge that is key to predict and to interpret observations. This session welcomes presentations that illustrate the most recent and advanced progress in modeling the strong field dynamics occurring in mergers, as well as models that describe the production of kilonovae, gamma-ray bursts and r-process nucleosynthesis. Presentations about the physics and the microphysics entering all these models are also welcome.
On August 17, 2017, the joint detection of GW170817 and GRB 170817A opened the era of multi-messenger astronomy with gravitational waves (GWs) and provided the first direct probe that at least some binary neutron star (BNS) mergers are progenitors of short gamma-ray bursts (S-GRBs). Since then, no other joint BNS/S-GRB observations have been reported. On May 2024 the fourth LVK observing run...
In the Universe, the nucleosynthesis beyond iron group elements occurs thanks to neutron capture processes. In the context of the multi-messenger astronomy, the observation of the electromagnetic (EM) counterpart of the GW170817 event, known as kilonova (KN), provided evidence that the coalescence of binary neutron stars systems is a favourable stellar site hosting the rapid neutron capture...
In previous work [1] it was shown that a crossover transition from hadronic to quark matter during the merger of neutron stars can lead to interesting observational consequences in the emergent gravitational radiation. In particular, the increased pressure in the crossover density region ($2-5$ times the nuclear saturation density) can lead to an extended duration of high frequency ( $\sim...
The gravitational waves from the binary neutron star merger GW170817 were accompanied by a multiwavelength electromagnetic counterpart, which confirms the association of the merger with a short gamma-ray burst (sGRB). The afterglow observations implied that the event was accompanied by a narrow, ~5°, and powerful, ~1e50 erg, jet. We study the propagation of a Poynting flux-dominated jet within...
The first detection of a binary neutron star merger has made sharp reality the long-standing paradigm that these cosmic fireworks are exciting laboratories for extreme physics. To get the most out of observations, however, we need accurate modelling of the merger dynamics via numerical relativity simulations. In this respect, the large amount of numerical work carried out over the last decade...
