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Probing the incompressibility of nuclear matter at ultra-high density through the prompt collapse of asymmetric neutron star binaries
A. Perego, D. Logoteta, D. Radice +5
Using 250 neutron star merger simulations with microphysics, we explore for the first time the role of nuclear incompressibility in the prompt collapse threshold for binaries with…
-process Nucleosynthesis and Kilonovae from Hypermassive Neutron Star Remnants
Sanjana Curtis, Philipp Mösta, Zhenyu Wu +4
We investigate -process nucleosynthesis and kilonova emission resulting from binary neutron star (BNS) mergers based on a three-dimensional (3D) general-relativistic magnetohydr…
A New Moment-Based General-Relativistic Neutrino-Radiation Transport Code: Methods and First Applications to Neutron Star Mergers
David Radice, Sebastiano Bernuzzi, Albino Perego +1
We present a new moment-based energy-integrated neutrino transport code for neutron star merger simulations in general relativity. In the merger context, ours is the first code to…
Neutrino emission from binary neutron star mergers: characterizing light curves and mean energies
Marco Cusinato, Federico Maria Guercilena, Albino Perego +4
Neutrinos are copiously emitted by neutron star mergers, due to the high temperatures reached by dense matter during the merger and its aftermath. Neutrinos influence the merger dy…
Radiation hydrodynamics modeling of kilonovae with SNEC
Zhenyu Wu, Giacomo Ricigliano, Rahul Kashyap +2
We develop a method to compute synthetic kilonova light curves that combines numerical relativity simulations of neutron star mergers and the radiation-hydrodynamic…
Numerical relativity simulations of prompt collapse mergers: threshold mass and phenomenological constraints on neutron star properties after GW170817
Rahul Kashyap, Abhishek Das, David Radice +10
We determine the threshold mass for prompt (no bounce) black hole formation in equal-mass neutron star (NS) mergers using a new set of 227 numerical relativity simulations. We cons…
Constraints on the maximum densities of neutron stars from postmerger gravitational waves with third-generation observations
Matteo Breschi, Sebastiano Bernuzzi, Daniel Godzieba +2
Using data from 289 numerical relativity simulations of merging binary neutron stars, we identify, for the first time, a robust quasi-universal relation connecting the postmerger p…
-process nucleosynthesis from compact binary mergers
Albino Perego, Friedrich-Karl Thielemann, Gabriele Cescutti
The merger of two neutron stars or of a neutron star and a black hole often result in the ejection of a few percents of a solar mass of matter expanding at high speed in space. Bei…
Signatures of deconfined quark phases in binary neutron star mergers
Aviral Prakash, David Radice, Domenico Logoteta +6
(abridged) We investigate the quark deconfinement phase transition in the context of binary neutron star (BNS) mergers. We employ a new finite-temperature composition-dependent equ…
The peculiar short-duration GRB 200826A and its supernova
A. Rossi, B. Rothberg, E. Palazzi +31
Gamma-ray bursts (GRBs) are classified as long and short events. Long GRBs (LGRBs) are associated with the end states of very massive stars, while short GRBs (SGRBs) are linked to…
Dynamical ejecta synchrotron emission as possible contributor to the changing behaviour of GRB170817A
Vsevolod Nedora, David Radice, Sebastiano Bernuzzi +5
Over the past three years, the fading non-thermal emission from the GW170817 remained generally consistent with the afterglow powered by synchrotron radiation produced by the inter…
Calibration of the Advanced Spectral Leakage scheme for neutron star merger simulations, and extension to smoothed-particle hydrodynamics
Davide Gizzi, Christoffer Lundman, Evan O'Connor +2
We calibrate a neutrino transport approximation, called Advanced Spectral Leakage (ASL), with the purpose of modeling neutrino-driven winds in neutron star mergers. Based on a numb…
In-plasma study of opacity relevant for compact binary ejecta
Angelo Pidatella, Sergio Cristallo, Alessio Galatà +7
In the context of the INFN project PANDORA_Gr3 (Plasma for Astrophysics, Nuclear Decays Observation and Radiation for Archaeometry) and of multi-messenger astronomy, we propose a f…
AT2017gfo: Bayesian inference and model selection of multi-component kilonovae and constraints on the neutron star equation of state
Matteo Breschi, Albino Perego, Sebastiano Bernuzzi +4
The joint detection of the gravitational wave GW170817, of the short -ray burst GRB170817A and of the kilonova AT2017gfo, generated by the the binary neutron star merger observe…