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Neutrinos play an important role in compact star astrophysics: neutrino-heating is one of the main ingredients in core-collapse supernovae, neutrino-matter interactions determine the composition of matter in binary neutron star mergers and…

High Energy Astrophysical Phenomena · Physics 2020-09-16 Micaela Oertel , Aurélien Pascal , Marco Mancini , Jerome Novak

We present the first two-dimensional general relativistic (GR) simulations of stellar core collapse and explosion with the CoCoNuT hydrodynamics code in combination with the VERTEX solver for energy-dependent, three-flavor neutrino…

Solar and Stellar Astrophysics · Physics 2015-06-04 B. Mueller , H. -Th. Janka , A. Marek

Core-collapse simulations of massive stars are performed using the equation of state (EOS) based on the microscopic variational calculation with realistic nuclear forces. The progenitor models with the initial masses of $15M_\odot$,…

High Energy Astrophysical Phenomena · Physics 2021-06-30 Ken'ichiro Nakazato , Kohsuke Sumiyoshi , Hajime Togashi

Recent analyses of several isospin effects in heavy-ion reactions have allowed us to constrain the density dependence of nuclear symmetry energy at sub-saturation densities within a narrow range. Combined with constraints on the Equation of…

Nuclear Theory · Physics 2008-06-24 Bao-An Li , Lie-Wen Chen , Che Ming Ko , Plamen G. Krastev , Aaron Worley

Short range correlations are introduced using unitary correlation method in a relativistic approach to the equation of state of the infinite nuclear matter in the framework of the Hartree-Fock approximation. It is shown that the…

Nuclear Theory · Physics 2011-07-19 P. K. Panda , João da Providência , Constança Providência

Neutrinos play a critical role of transporting energy and changing the lepton density within core-collapse supernovae and neutron star mergers. The quantum kinetic equations (QKEs) combine the effects of neutrino-matter interactions treated…

High Energy Astrophysical Phenomena · Physics 2024-09-13 Sherwood A. Richers , Gail C. McLaughlin , James P. Kneller , Alexey Vlasenko

In this thesis, conducted in the field of few--body nuclear physics,I studied low energy inelastic reactions of electro--weak probes on light nuclei. Such interactions hold experimental and theoretical attention in recent years because of…

Nuclear Theory · Physics 2008-07-02 Doron Gazit

The computational difficulty of six-dimensional neutrino radiation hydrodynamics has spawned a variety of approximations, provoking a long history of uncertainty in the core-collapse supernova explosion mechanism. Under the auspices of the…

Ascertaining the core-collapse supernova mechanism is a complex, and yet unsolved, problem dependent on the interaction of general relativity, hydrodynamics, neutrino transport, neutrino-matter interactions, and nuclear equations of state…

We construct a new equation of state (EOS) for numerical simulations of core-collapse supernovae and neutron-star mergers based on an extended relativistic mean-field model with a small symmetry energy slope $L$, which is compatible with…

Nuclear Theory · Physics 2020-03-17 Hong Shen , Fan Ji , Jinniu Hu , Kohsuke Sumiyoshi

Core collapse supernovae are unique laboratories to study many aspects of neutrino physics. The vicinity of the proto-neutron star in a core-collapse supernova is characterized by large matter and neutrino densities. A salient feature of…

Solar and Stellar Astrophysics · Physics 2015-06-11 A. B. Balantekin

The spectroscopy of electron capture neutrinos emitted from nearby pre-supernova collapsing stars before the neutrino trapping sets in, can yield useful information on the physical conditions and on the nuclear composition of the core. The…

Astrophysics · Physics 2011-05-23 F. K. Sutaria , A. Ray , J. A. Sheikh , P. Ring

Core-collapse supernovae are among Nature's grandest explosions. They are powered by the energy released in gravitational collapse and include a rich set of physical phenomena involving all fundamental forces and many branches of physics…

High Energy Astrophysical Phenomena · Physics 2011-11-29 C. D. Ott , E. P. O'Connor , B. Dasgupta

We investigate to what extent the temperature dependence of the nuclear symmetry energy can affect the neutronization of the stellar core prior to neutrino trapping during gravitational collapse. To this end, we implement a one-zone…

Astrophysics · Physics 2011-11-24 A. F. Fantina , P. Donati , P. M. Pizzochero

The overwhelming evidence that the core collapse supernova mechanism is inherently multidimensional, the complexity of the physical processes involved, and the increasing evidence from simulations that the explosion is marginal presents…

This paper explores core-collapse supernovae as crucial targets for neutrino telescopes, addressing uncertainties in their simulation results. We comprehensively analyze eighteen modern simulations and discriminate among supernova models…

High Energy Astrophysical Phenomena · Physics 2024-01-10 Maria Manuela Saez , Ermal Rrapaj , Akira Harada , Shigehiro Nagataki , Yong-Zhong Qian

Core collapse supernovae are the leading actor in the story of the cosmic origin of the chemical elements. Existing models, which generally assume spherical symmetry and parameterize the explosion, have been able to broadly replicate the…

We compare three different statistical models for the equation of state (EOS) of stellar matter at subnuclear densities and temperatures (0.5-10 MeV) expected to occur during the collapse of massive stars and supernova explosions. The…

In the framework of mean-field based transport approaches, we discuss recent results concerning collective motion and low-energy heavy ion reactions involving neutron-rich systems. We focus on aspects which are particularly sensitive to the…

Nuclear Theory · Physics 2019-03-11 Stefano Burrello , Maria Colonna , Hua Zheng

Neutron stars are compact objects of large interest in the nuclear astrophysics community. The extreme conditions present in such systems impose big challenges to our current microscopic models of nuclear structure. Equation of states (EoS)…

Nuclear Theory · Physics 2022-03-01 Ronaldo V. Lobato , Emanuel V. Chimanski , Carlos A. Bertulani