Neutron matter, symmetry energy and neutron stars

6th Nuclear Physics in Astrophysics

物理学;天文学

Gandolfi, S.^1 ; Steiner, A.W.^2,3

Theoretical Division, Los Alamos National Laboratory, Los Alamos

NM

87545, United States^1

Department of Physics and Astronomy, University of Tennessee, Knoxville

TN

37996, United States^2

Physics Division, Oak Ridge National Laboratory, Oak Ridge

TN

37831, United States^3

关键词: Equation of state;    Isospin asymmetries;    Nuclear symmetry energy;    Nucleon-nucleon interaction;    Quantum monte carlo;    Recent progress;    Saturation density;    Symmetry energies;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/665/1/012063/pdf
DOI  :  10.1088/1742-6596/665/1/012063

学科分类：天文学(综合)

来源: IOP

【 摘 要 】

Recent progress in quantum Monte Carlo with modern nucleon-nucleon interactions have enabled the successful description of properties of light nuclei and neutron- rich matter. Of particular interest is the nuclear symmetry energy, the energy cost of creating an isospin asymmetry, and its connection to the structure of neutron stars. Combining these advances with recent observations of neutron star masses and radii gives insight into the equation of state of neutron-rich matter near and above the saturation density. In particular, neutron star radius measurements constrain the derivative of the symmetry energy.