Comparing Treatments of Weak Reactions with Nuclei in Simulations of Core-collapse Supernovae
Hiroki Nagakura,Hiroki Nagakura,Shun Furusawa,Hajime Togashi,Sherwood Richers,Kohsuke Sumiyoshi,Shoichi Yamada +6 more
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In this paper, the influence of nuclear weak interactions on core-collapse supernovae (CCSNe) was studied, paying particular attention to consistency between nuclear abundances in the equation of state (EOS) and nuclear weak interaction rates.Abstract:
We perform an extensive study of the influence of nuclear weak interactions on core-collapse supernovae (CCSNe), paying particular attention to consistency between nuclear abundances in the equation of state (EOS) and nuclear weak interactions. We compute properties of uniform matter based on the variational method. For inhomogeneous nuclear matter, we take a full ensemble of nuclei into account with various finite-density and thermal effects and directly use the nuclear abundances to compute nuclear weak interaction rates. To quantify the impact of a consistent treatment of nuclear abundances on CCSN dynamics, we carry out spherically symmetric CCSN simulations with full Boltzmann neutrino transport, systematically changing the treatment of weak interactions, EOSs, and progenitor models. We find that the inconsistent treatment of nuclear abundances between the EOS and weak interaction rates weakens the EOS dependence of both the dynamics and neutrino signals. We also test the validity of two artificial prescriptions for weak interactions of light nuclei and find that both prescriptions affect the dynamics. Furthermore, there are differences in neutrino luminosities by ~10% and in average neutrino energies by 0.25-1 MeV from those of the fiducial model. We also find that the neutronization burst neutrino signal depends on the progenitor more strongly than on the EOS, preventing a detection of this signal from constraining the EOS.read more
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The overarching framework of core-collapse supernova explosions as revealed by 3D fornax simulations
Adam Burrows,David Radice,David Radice,David Vartanyan,Hiroki Nagakura,M. Aaron Skinner,Joshua C. Dolence +6 more
TL;DR: In this article, the authors conducted 19 state-of-the-art 3D core-collapse supernova simulations spanning a broad range of progenitor masses and found that while the majority of these models explode, not all do, and that even models in the middle of the available proggenitor mass range may be less explodable.
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Fast neutrino-flavor conversion in the preshock region of core-collapse supernovae
TL;DR: In this paper, a new possibility of collective neutrino oscillation in core-collapse supernovae was proposed, where neutrinos scattered on nuclei in the pre-shock region induce the fast flavor instability in the outward direction.
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Fast-pairwise Collective Neutrino Oscillations Associated with Asymmetric Neutrino Emissions in Core-collapse Supernovae
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A systematic study of proto-neutron star convection in three-dimensional core-collapse supernova simulations
TL;DR: In this article, the first systematic study of proto-neutron star convection in three dimensions (3D) based on the latest numerical Fornax models of core-collapse supernova (CCSN) is presented.
Journal ArticleDOI
Fast-pairwise collective neutrino oscillations associated with asymmetric neutrino emissions in core-collapse supernova
TL;DR: In this article, a linear stability analysis of the fast-pairwise neutrino flavor conversion based on a result of axisymmetric core-collapse supernova (CCSN) simulation with full Boltzmann neutrinos transport is presented.
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Journal ArticleDOI
A massive pulsar in a compact relativistic binary
John Antoniadis,Paulo C. C. Freire,Norbert Wex,Thomas M. Tauris,Ryan S. Lynch,Marten H. van Kerkwijk,Michael Kramer,Michael Kramer,C. G. Bassa,V. S. Dhillon,T. Driebe,Jason W. T. Hessels,Jason W. T. Hessels,Victoria M. Kaspi,V. I. Kondratiev,V. I. Kondratiev,Norbert Langer,Tom Marsh,Maura McLaughlin,Timothy T. Pennucci,Scott M. Ransom,Ingrid H. Stairs,Joeri van Leeuwen,Joeri van Leeuwen,Joris P. W. Verbiest,David G. Whelan +25 more
TL;DR: Pulsar J0348+0432 is only the second neutron star with a precisely determined mass of 2 M☉
Journal ArticleDOI
Multi-messenger Observations of a Binary Neutron Star Merger
Fermi Gbm,AstroSat Cadmium Zinc Telluride Imager Team,Agile Team,Grawita,Atca,Australia Telescope Compact Array,Askap,Australian Ska Pathfinder,OzGrav,Dwf,Caastro Collaborations,J-Gem,Jagwar,Caltech Nrao,Ttu-Nrao,NuSTAR Collaborations,Pan-STARRS,Nordic Optical Telescope,ePESSTO,Grond,Toros,Mwa,Murchison Widefield Array,Lwa,Long Wavelength Array,Euro Vlbi Team,Dfn,Rimas,Ratir,Ska South MeerKAT +29 more
TL;DR: In this article, a binary neutron star coalescence candidate (later designated GW170817) with merger time 12:41:04 UTC was observed through gravitational waves by the Advanced LIGO and Advanced Virgo detectors.
Journal ArticleDOI
Multi-messenger observations of a binary neutron star merger
Fermi Gbm,AstroSat Cadmium Zinc Telluride Imager Team,Agile Team,M H Team,Atca: Australia Telescope Compact Array,Askap: Australian Ska Pathfinder,Askap: Australian Ska Pathfinder,OzGrav, Dwf , Ast,Caastro Collaborations,J-Gem,Growth, Jagwar, Caltech-NRAO, Ttu-Nrao,NuSTAR Collaborations,Pan-STARRS,Maxi Team,Nordic Optical Telescope,ePESSTO,Grond,Mwa: Murchison Widefield Array,Lwa: Long Wavelength Array,Euro Vlbi Team,Rimas,Ratir,Ska South Africa,MeerKAT +23 more
TL;DR: A binary neutron star coalescence candidate (later designated GW170817) with merger time 12:41:04 UTC was observed through gravitational waves by the Advanced LIGO and Advanced Virgo detectors.