Further explorations of Skyrme-Hartree-Fock-Bogoliubov mass formulas. XII. Stiffness and stability of neutron-star matter

By S. Goriely, N. Chamel, J. Pearson. 2010

296 citations recorded by the source corpus.

We construct three new Hartree-Fock-Bogoliubov (HFB) mass models, labeled HFB-19, HFB20, and HFB-21, with unconventional Skyrme forces containing t4 and t5 terms, i.e., densitydependent generalizations of the usual t1 and t2 terms, respectively. The new forces underlying these models are fitted respectively to three different realistic equations of state of neutron matter for which the density dependence of the symmetry energy ranges from the very soft to the very stiff, reflecting thereby our present lack of complete knowledge of the high-density behavior of nuclear matter. All unphysical instabilities of nuclear matter, including the transition to a polarized state in neutron-star matter, are eliminated with the new forces. At the same time the new models fit essentially all the available mass data with rms deviations of 0.58 MeV and give the same high quality fits to measured charge radii that we obtained in earlier models with conventional Skyrme forces. Being constrained by neutron matter, these new mass models, which all give similar extrapolations out to the neutron drip line, are highly appropriate for studies of the r-process and the outer crust of neutron stars. Moreover, the underlying forces, labeled BSk19, BSk20 and BSk21, respectively, are well adapted to the study of the inner crust and core of neutron stars. The new family of Skyrme forces thus opens the way to a unified description of all regions of neutron stars.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/0317088eb8bbc37620051bafc8f1548a7327360a

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Citations in the corpus

Unified equation of state for neutron stars on a microscopic basis (2015, methodology): “We shall adopt here the EoS of the BSk21 model (Chamel et al. 2011; Pearson et al. 2012; Fantina et al. 2013; Potekhin et al. 2013; Goriely et al. 2010) as a representative example of contemporary EoS for the complete NS structure, and a comparison with the other EoSs of the BSk family (Chamel et…”
Neutron Stars—Cooling and Transport (2015, methodology): “The latter parameter has been fitted as function of density for modern BSk models of nuclear matter (Potekhin et al. 2013) and for some other models (Appendix B in Haensel et al. 2007).”
r-PROCESS NUCLEOSYNTHESIS IN DYNAMICALLY EJECTED MATTER OF NEUTRON STAR MERGERS (2011, methodology): “Experimentally unknown reactions are estimated with the TALYS code (Goriely et al. 2008) on the basis of the HFB21 nuclear mass model (Goriely et al. 2010).”
RADIOACTIVITY AND THERMALIZATION IN THE EJECTA OF COMPACT OBJECT MERGERS AND THEIR IMPACT ON KILONOVA LIGHT CURVES (2016, methodology): “…model for four different nuclear mass models: the Finite Range Droplet Model (FRDM; Möller et al. 1995), the Hartree–Fock–Bogoliubov model HFB21 (Goriely et al. 2010), the Weizsäcker–Skyrme model (WS3; Liu et al. 2011), and the Duflo–Zucker model with 31 parameters (DZ31; Duflo & Zuker 1995).”
THE r-PROCESS NUCLEOSYNTHESIS IN THE VARIOUS JET-LIKE EXPLOSIONS OF MAGNETOROTATIONAL CORE-COLLAPSE SUPERNOVAE (2015, methodology): “Improvement of this mass model, which is a new FRDM (see, Möller et al. 2012; Kratz et al. 2014), or different mass models, e.g., HFB (Goriely et al. 2009, 2010) are expected to solve this problem.”
Unified equations of state for cold non-accreting neutron stars with Brussels-Montreal functionals. I. Role of symmetry energy (2018, unknown): “For each functional complete HFB nuclear-mass tables, running from one drip line to the other, and labelled HFB-19, HFB-20, and HFB-21, respectively, were constructed (Goriely et al. 2010).”
Radioactive decays at limits of nuclear stability (2011, result): “To illustrate theoretical uncertainties we compare predictions of the FRDM model with results of the HFB-17 model (Goriely et al., 2009) which represents a class of fully microscopic approaches based on Hartree-Fock-Bogoliubov formalism and Skyrme forces (Goriely et al., 2010).”
Comprehensive nucleosynthesis analysis for ejecta of compact binary mergers (2014, methodology): “Experimentally unknown reactions are estimated with the TALYS code (Koning, Hilaire & Duijvestijn 2005; Goriely et al. 2008) on the basis of the Skyrme Hartree–Fock–Bogolyubov (HFB) nuclear mass model, HFB-21 (Goriely et al. 2010).”
Origin of the heaviest elements: The rapid neutron-capture process (2019, unknown): “, 1995), HFB-21 (Goriely et al., 2010), DZ10, DZ31 (Duflo and Zuker, 1995), and WS3 (Liu et al.”