HNPS Advances in Nuclear Physics Banner

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

PDF
Published: Nov 23, 2019
DOI: https://doi.org/10.12681/hnps.2545
Keywords:
Nuclear density functional Equation of state Neutron star crust
Ch. C. Moustakidis
AUTH
T. Niksic
U. Zagreb
G. A. Lalazissis
AUTh
D. Vretenar
U. Zagreb
P. Ring
TU Munchen
Abstract

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].

Article Details
  • Section
  • Oral contributions
References
Ch.C. Moustakidis, T. Niksic, G.A. Lalazissis, D. Vretenar, and P. Ring, Phys. Rev. C 81, 065803 (2010)
P. Haensel, A.Y. Potekhin, and D.G. Yakovlev, Neutron Stars 1: Equation of State and Structure (Springer-Verlag, New York, 2007)
M.B. Tsang et al., Phys. Rev. Lett. 92, 062701(2004)
L.W. Chen, C.M. Ko, and B.A. Li, Phys. Rev. Lett. 94, 032701 (2005).
J.M. Lattimer and M. Prakash, Phys. Rep. 442, 109 (2007)
H.B. Callen, Thermodynamics, Wiley, New York, 1985
T. Niksic, D. Vretenar, and P. Ring, Phys. Rev. C 78, 034318 (2008)
J. Xu, L.W. Chen, B.A. Li, and H.R. Ma, Astrophys. J. 697, 1549 (2009)
A. Akmal, V.R. Pandharipande, and D.G. Ravenhall, Phys. Rev. C 58, 1804 (1998)
F. Sammarruca and P. Liu, Phys. Rev. C 79, 057301 (2009)
R. Machleidt, Adv. Nucl. Phys. 19, 189 (1989)
C.J. Horowitz and J. Piekarewicz, Phys. Rev. Let. 86, 5647 (2001)