Hybrid Stars Built with Density Dependent Models

TL;DR

This paper develops hybrid neutron star models incorporating density-dependent quark and hadronic matter, analyzing phase transitions and stellar properties, aligning with recent astrophysical observations.

Contribution

It introduces, for the first time, models of hybrid neutron stars with density-dependent quark and hadronic matter using a Maxwell construction.

Findings

Models are compatible with recent astrophysical data.

Phase transition details influence star structure.

Hybrid stars can contain hyperons and Δ-resonances.

Abstract

Using a density dependent quark model and a relativistic model within the mean-field approximation for hadrons with density dependent meson-baryon couplings, we construct, for the first time, models that describe hybrid neutron stars consisting of nucleons and exotic baryons (hyperons and $\Delta$-resonances). We do the study using a Maxwell construction. The quark-hadron phase transition in the stellar matter is determined through; the structure, composition, and properties of the hybrid neutron star matter. The macroscopic properties of the star are determined, and the results for these particular models are found to be compatible with recent observational astrophysical data.