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Multi-dimensional hydrodynamic simulations of the post-bounce evolution of collapsed stellar iron cores have demonstrated that convective overturn between the stalled shock and the neutrinosphere can have an important effect on the…

Astrophysics · Physics 2007-05-23 H. -Th. Janka

The equation of state for neutron stars in a wide-density range at zero temperature is constructed. The chiral quark-meson coupling model within relativistic Hartree-Fock approximation is adopted for uniform nuclear matter. The coupling…

High Energy Astrophysical Phenomena · Physics 2013-10-15 Tsuyoshi Miyatsu , Sachiko Yamamuro , Ken'ichiro Nakazato

The merger dynamics of a black hole-neutron star (BHNS) binary is influenced by the neutron star equation of state (EoS) through the latter's effect on the neutron star's radius and on the character of the mass transfer onto the black hole.…

High Energy Astrophysical Phenomena · Physics 2014-11-20 Matthew D. Duez , Francois Foucart , Lawrence E. Kidder , Christian D. Ott , Saul A. Teukolsky

The influence of the presence of hyperons in dense hadronic matter on the quantum nucleation of quark matter is examined at low temperatures relevant to neutron star cores. We calculate the equation of state and the composition of matter…

Nuclear Theory · Physics 2008-11-26 Kei Iida , Katsuhiko Sato

Some massive stars end their lives as \textit{failed} core-collapse supernovae (CCSNe) and become black holes (BHs). Although in this class of phenomena the stalled supernova shock is not revived, the outer stellar envelope can still be…

High Energy Astrophysical Phenomena · Physics 2022-10-03 A. S. Schneider , E. O'Connor

Recent detailed 1D core-collapse simulations have brought new insights on the final fate of massive stars, which are in contrast to commonly used parametric prescriptions. In this work, we explore the implications of these results to the…

An extended set of binary neutron star (NS) merger simulations is performed with an approximative conformally flat treatment of general relativity to systematically investigate the influence of the nuclear equation of state (EoS), the…

Astrophysics · Physics 2009-11-11 R. Oechslin , H. -T. Janka , A. Marek

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 analyse and determine the effects of modest progenitor rotation in the context of core-collapse supernovae by comparing two separate long-duration three-dimensional simulations of 9 M$_{\odot}$ progenitors, one rotating with an initial…

High Energy Astrophysical Phenomena · Physics 2022-05-04 Matthew S. B. Coleman , Adam Burrows , Christopher J. White

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 consider 23 phenomenological and microphysical finite…

Stars of ~8-100 solar masses end their lives as core-collapse supernovae (SNe). In the process they emit a powerful burst of neutrinos, produce a variety of elements, and leave behind either a neutron star or a black hole. The wide mass…

High Energy Astrophysical Phenomena · Physics 2018-01-30 Yong-Zhong Qian

Recent observations have found several candidates for old warm neutron stars whose surface temperatures are above the prediction of the standard neutron star cooling scenario, and thus require some heating mechanism. Motivated by these…

High Energy Astrophysical Phenomena · Physics 2020-02-20 Keisuke Yanagi , Natsumi Nagata , Koichi Hamaguchi

The pressure-temperature phase diagram of a one-component system, with particles interacting through a spherically symmetric pair potential in two dimensions is studied. The interaction consists of a hard core plus an additional repulsion…

Statistical Mechanics · Physics 2009-10-31 E. A. Jagla

It has been suggested that whether a star explodes or not, and what kind of explosion properties it shows, is strongly dependent on the progenitor's core structure. We present the results from 101 axisymmetric core-collapse supernova…

High Energy Astrophysical Phenomena · Physics 2018-05-02 Shunsaku Horiuchi , Ko Nakamura , Tomoya Takiwaki , Kei Kotake

The equation of state (EoS) and composition of dense and hot $\Delta$-resonance admixed hypernuclear matter is studied under conditions that are characteristic of neutron star binary merger remnants and supernovas. The cold, neutrino free…

Nuclear Theory · Physics 2022-08-01 Armen Sedrakian , Arus Harutyunyan

We study the structure of newly born neutron stars (protoneutron stars) within the finite temperature Brueckner-Bethe-Goldstone theoretical approach including also hyperons. We find that for purely nucleonic stars both finite temperature…

Nuclear Theory · Physics 2011-05-23 O. E. Nicotra , M. Baldo , G. F. Burgio , H. -J. Schulze

During the late stages of gravitational core-collapse of massive stars, extreme isospin asymmetries are reached within the core. Due to the lack of microscopic calculations of electron capture (EC) rates for all relevant nuclei, in general…

Nuclear Theory · Physics 2017-02-22 Ad. R. Raduta , F. Gulminelli , M. Oertel

The equation of state (EOS) of dense matter plays an important role in the supernova phenomenon, the structure of neutron stars, and in the mergers of compact objects (neutron stars and black holes). During the collapse phase of a…

Astrophysics · Physics 2010-04-06 James M. Lattimer , Madappa Prakash

In this work, we present an equation of state formalism for hot Neutron Stars (NSs) which consistently includes the effects of finite temperature, hyperons as well as neutrino trapping, relevant for the study of proto-neutron stars, binary…

High Energy Astrophysical Phenomena · Physics 2025-12-03 Nilaksha Barman , Debarati Chatterjee

Calculations are performed of the cooling of neutron stars with standard and enhanced neutrino energy losses in the presence of neutron and proton superfluidities in the stellar cores. The effects of superfluidity on the heat capacity and…

Astrophysics · Physics 2007-05-23 K. P. Levenfish , D. G. Yakovlev
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