scholarly journals Constraints on the inner edge of neutron star crusts from relativistic nuclear energy density functionals

2010 ◽  
Vol 81 (6) ◽  
Author(s):  
Ch. C. Moustakidis ◽  
T. Nikšić ◽  
G. A. Lalazissis ◽  
D. Vretenar ◽  
P. Ring
2019 ◽  
Vol 18 ◽  
pp. 107
Author(s):  
Ch. C. Moustakidis ◽  
T. Niksic ◽  
G. A. Lalazissis ◽  
D. Vretenar ◽  
P. Ring

The transition density nt and pressure Pt at the inner edge between the liquid core and the solid crust of a neutron star are analyzed using the thermodynami- cal method and the framework of relativistic nuclear energy density functionals. Starting from a functional that has been carefully adjusted to experimental binding energies of finite nuclei, and varying the density dependence of the cor- responding symmetry energy within the limits determined by isovector prop- erties of finite nuclei, we estimate the constraints on the core-crust transition density and pressure of neutron stars: 0.086 fm−3 ≤ nt < 0.090 fm−3 and 0.3 MeV fm−3 < Pt ≤ 0.76 MeV fm−3 [1].


2020 ◽  
Vol 56 (6) ◽  
Author(s):  
Young-Min Kim ◽  
Kyujin Kwak ◽  
Chang Ho Hyun ◽  
Hana Gil ◽  
Chang-Hwan Lee

2015 ◽  
Vol 46 (3) ◽  
pp. 369
Author(s):  
N. Paar ◽  
Ch.C. Moustakidis ◽  
G.A. Lalazissis ◽  
T. Marketin ◽  
D. Vretenar

2010 ◽  
Vol 19 (04) ◽  
pp. 548-557 ◽  
Author(s):  
D. VRETENAR ◽  
T. NIKŠIĆ ◽  
P. RING

A class of relativistic nuclear energy density functionals is explored, in which only nucleon degrees of freedom are explicitly used in the construction of effective interaction terms. Short-distance correlations, as well as intermediate and long-range dynamics, are encoded in the nucleon-density dependence of the strength functionals of an effective interaction Lagrangian. The resulting phenomenological effective interaction, adjusted to experimental binding energies of a large set of axially deformed nuclei, together with a new separable pairing interaction adjusted to reproduce the pairing gap in nuclear matter calculated with the Gogny force, is applied in triaxial relativistic Hartree-Bogoliubov calculations of sequences of heavy nuclei: Th , U , Pu , Cm , Cf , Fm , and No .


2011 ◽  
Vol 83 (3) ◽  
Author(s):  
N. Nikolov ◽  
N. Schunck ◽  
W. Nazarewicz ◽  
M. Bender ◽  
J. Pei

2020 ◽  
Vol 51 (3) ◽  
pp. 611
Author(s):  
P. Bączyk ◽  
M. Konieczka ◽  
K.M.L. Martinez ◽  
S. Antić ◽  
P.A.M. Guichon ◽  
...  

2014 ◽  
Vol 89 (2) ◽  
Author(s):  
L. M. Robledo ◽  
R. N. Bernard ◽  
G. F. Bertsch

2016 ◽  
Vol 724 ◽  
pp. 012041
Author(s):  
X. Roca-Maza ◽  
G. Colò ◽  
H. Z. Liang ◽  
J. Meng ◽  
P. Ring ◽  
...  

Symmetry ◽  
2021 ◽  
Vol 13 (1) ◽  
pp. 144
Author(s):  
Giovanni Selva ◽  
Xavier Roca-Maza ◽  
Gianluca Colò

Isospin symmetry breaking effects on the mass-radius relation of a cold, non-accreting neutron star are studied on the basis of two Skyrme Energy Density Functionals (EDFs). One functional contains isospin symmetry breaking terms other than those typically included in Skyrme EDFs while its counterpart is of standard form. Both functionals are based on the same fitting protocol except for the observables and pseudo-observables sensitive to the isospin symmetry breaking channel. The quality of those functionals is similar in the description of terrestrial observables but choosing either of them has a non-negligible effect on the mass-radius relation and tidal deformability of a neutron star. Further investigations are needed to clarify the effects of isospin symmetry breaking on these and other observables of neutron stars that are, and will become, available.


Sign in / Sign up

Export Citation Format

Share Document