Density-dependent van der Waals model under the GW170817 constraint
Abstract
We propose a density-dependent function for the attractive interaction in the original van der Waals model to correctly describe the flow constraint at the high-density regime of the symmetric nuclear matter. After a generalization to asymmetric nuclear matter, it was also possible to study the stellar matter regime from this new model. The mass-radius relation for neutron stars under -equilibrium is found to agree with recent X-ray observations. The neutron star masses supported against gravity, obtained from some parametrizations of the model, are in the range of , compatible with observational data from the PSR J0348+0432 pulsar. Furthermore, we verify the reliability of the model in predicting tidal deformabilities of the binary system related to the GW170817 neutron star merger event and find a full agreement with the new bounds obtained by the LIGO/Virgo collaboration.
Cite
@article{arxiv.1908.05114,
title = {Density-dependent van der Waals model under the GW170817 constraint},
author = {O. Lourenço and M. Dutra and C. H. Lenzi and M. Bhuyan and S. K. Biswal and B. M. Santos},
journal= {arXiv preprint arXiv:1908.05114},
year = {2021}
}
Comments
11 pages, 7 figures. Accepted to ApJ. Two references added