Effects of short-range nuclear correlations on the deformability of neutron stars
L. A. Souza, M. Dutra, César H. Lenzi, O. Lourenço
Abstract
In the present work, we investigate the effects of short-range correlations (SRC) on the dimensionless deformability of the binary neutron system related to the GW170817 event. We implemented phenomenological SRC in a relativistic mean-field model in which the bulk parameters, namely, incompressibility (${K}_{0}$), effective nucleon mass ratio (${m}^{*}$), symmetry energy ($J$), and its slope (${L}_{0}$), are independently controlled. Our results point out that the SRC favor the model to pass through the constraints, established by the LIGO/Virgo Collaboration, on the values of ${\mathrm{\ensuremath{\Lambda}}}_{1.4}$ and on the ${\mathrm{\ensuremath{\Lambda}}}_{1}\ifmmode\times\else\texttimes\fi{}{\mathrm{\ensuremath{\Lambda}}}_{2}$ region. We also found a clear linear correlation between ${\mathrm{\ensuremath{\Lambda}}}_{1.4}$ with ${K}_{0}$ and ${L}_{0}$ (increasing dependence), and with ${m}^{*}$ and $J$ (decreasing dependence). Finally, we also obtained compatible numbers for ${R}_{1.4}$ (model with and without SRC) in comparison with recent data from the neutron star interior composition explorer mission.