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The impact of beyond mean field effects on the ground state and fission properties of superheavy nuclei has been investigated in a five-dimensional collective Hamiltonian based on covariant density functional theory. The inclusion of…

Nuclear Theory · Physics 2020-03-17 Z. Shi , A. V. Afanasjev , Z. P. Li , J. Meng

We study possible impact of a softening of the equation of state by a phase transition, or appearance of hyperons, on the spin evolution of of isolated pulsars. Numerical simulations are performed using exact 2-D simulations in general…

Astrophysics · Physics 2008-11-26 P. Haensel , J. L. Zdunik

The first results of a new three-dimensional, finite temperature Skyrme-Hartree-Fock+BCS study of the properties of inhomogeneous nuclear matter at densities and temperatures leading to the transition to uniform nuclear matter are…

Solar and Stellar Astrophysics · Physics 2009-05-05 W. G. Newton J. R. Stone

We study the influence of density-dependent symmetry energy at high densities in simulations of core-collapse supernovae, black hole formation and proto-neutron star cooling by extending the relativistic mean field (RMF) theory used for the…

High Energy Astrophysical Phenomena · Physics 2020-01-01 Kohsuke Sumiyoshi , Ken'ichiro Nakazato , Hideyuki Suzuki , Jinniu Hu , Hong Shen

The nuclear density dependencies of the neutron and $\Sigma$ and $\Lambda$ hyperons are important inputs in the determination of the neutron star mass as the appearance of hyperons coming from strong attractions significantly changes the…

Nuclear Theory · Physics 2016-12-13 Kie Sang Jeong , Giju Gye , Su Houng Lee

We construct the equation of state (EOS) of nuclear matter using the relativistic mean field (RMF) theory in the wide density, temperature range with various proton fractions for the use of supernova simulation and the neutron star…

Nuclear Theory · Physics 2009-10-31 H. Shen , H. Toki , K. Oyamatsu , K. Sumiyoshi

Nuclear collisions can compress nuclear matter to densities achieved within neutron stars and within core-collapse supernovae. These dense states of matter exist momentarily before expanding. We analyzed the flow of matter to extract…

Nuclear Theory · Physics 2009-11-07 P. Danielewicz , R. Lacey , W. G. Lynch

The spin and parity dependent nuclear level densities (NLD) are calculated for medium-heavy nuclei using shell model techniques. The NLD are used to calculate cross sections and reaction rates of interest for nuclear astrophysics and…

Nuclear Theory · Physics 2018-01-17 Mihai Horoi , Jayani Dissanayake

We study the dependence of the delayed neutrino-heating mechanism for core-collapse supernovae on the equation of state. Using a simplified treatment of the neutrino physics with a parameterized neutrino luminosity, we explore the…

High Energy Astrophysical Phenomena · Physics 2013-07-29 Sean M. Couch

A detailed model is constructed for the calculation of electron capture rates of some fp-shell nuclei for situations prevailing in pre-supernova and collapse phases of the evolution of the core of massive stars leading to supernova…

Astrophysics · Physics 2007-05-23 S. Chakravarti , K. Kar , A. Ray , S. Sarkar

We present a unified description of dense matter and neutron-star structure based on simple but physically motivated models. Starting from the thermodynamics of degenerate Fermi gases, we construct an equation of state for cold, catalyzed…

Nuclear Theory · Physics 2026-01-28 Elissaios Andronopoulos , Konstantinos N. Gourgouliatos

Current models for the $r$ process are summarized with an emphasis on the key constraints from both nuclear physics measurements and astronomical observations. In particular, we analyze the importance of nuclear physics input such as…

Nuclear Theory · Physics 2017-05-31 Toshitaka Kajino , Grant J. Mathews

Dense matter as it can be found in core-collapse supernovae and neutron stars is expected to exhibit different phase transitions which impact the matter composition and the equation of state, with important consequences on the dynamics of…

Nuclear Theory · Physics 2013-02-18 F. Gulminelli , Ad-R. Raduta , J. Margueron , P. Papakonstantinou , M. Oertel

We review various theoretical approaches for the equation of state (EoS) of dense matter, relevant for the description of core-collapse supernovae, compact stars and compact star mergers. The emphasis is put on models that are applicable to…

High Energy Astrophysical Phenomena · Physics 2017-04-05 M. Oertel , M. Hempel , T. Klähn , S. Typel

A general formula of the symmetry energy for many-body interaction is proposed and the commonly used two-body interaction symmetry energy is recovered. Within Landau's theory (Lt), we generalize two equations of state (EoS) CCS$\delta$3 and…

Nuclear Theory · Physics 2015-07-03 H. Zheng , J. Sahagun , A. Bonasera

Nuclear weak-interaction rates are known to exert a prominent effect in the late-stages of stellar collapse. Despite their importance, most studies to date on core-collapse supernovae (CCSNe) have focused primarily on the effects of…

High Energy Astrophysical Phenomena · Physics 2026-05-26 T. Dasher , A. Ravlić , S. Lalit , E. O'Connor , K. Godbey

The activity of massive stars approaching core-collapse can strongly affect the appearance of the star and its subsequent supernova. Late-phase convective nuclear burning generates waves that propagate toward the stellar surface, heating…

High Energy Astrophysical Phenomena · Physics 2023-05-10 Shing-Chi Leung , Jim Fuller

In view of new constraints put forth by recent observations and measurements in the realm of astrophysics and nuclear physics, we update the non-linear realization of the sigma model as to reflect such constraints. By doing this, we obtain…

High Energy Astrophysical Phenomena · Physics 2015-07-17 V. Dexheimer , R. Negreiros , S. Schramm

In this work we provide a new, well-controlled expansion of the equation of state of dense matter from zero to finite temperatures ($T$) while covering a wide range of charge fractions ($Y_Q$), from pure neutron to isospin symmetric nuclear…

High Energy Astrophysical Phenomena · Physics 2025-06-06 Debora Mroczek , Nanxi Yao , Katherine Zine , Jacquelyn Noronha-Hostler , Liam Brodie , Veronica Dexheimer , Alexander Haber , Elias R. Most

We explore, using a state-of-the-art simulation code in 3D and to late enough times to witness final observables, the dependence of core-collapse supernova explosions on the nuclear equation of state. Going beyond questions of…

High Energy Astrophysical Phenomena · Physics 2026-04-21 Aleksandr Rusakov , Adam S. Burrows , Tianshu Wang , David Vartanyan