Short-range correlations effects on the deformability of neutron stars

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 ($m^{\ast }$), symmetry energy ($J$) and its slope ($J_0$), 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 ${\Lambda }_{1.4}$ and on the ${\Lambda }_1\times {\Lambda }_2$ region. We also found a clear linear correlation between ${\Lambda }_{1.4}$ with $K_0$ and $L_0$ (increasing dependence), and with $m^{\ast }$ 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.

arXiv comment9 pages. 6 figures. It matches published version

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