Hybrid Equations of State for Neutron Stars with Hyperons and Deltas

TL;DR

This paper introduces new hybrid equations of state for neutron stars that incorporate various particle populations and phase transitions, aiding astrophysical modeling of dense stellar objects.

Contribution

It presents novel chemically-equilibrated, charge-neutral hybrid equations of state with first-order phase transitions, including hyperons, Deltas, and quarks, expanding existing models.

Findings

Equations of state include hyperons, Deltas, and strange quarks.

First-order phase transition to quark matter modeled.

Available on the CompOSE repository for astrophysical use.

Abstract

In this contribution, we describe new chemically-equilibrated charge-neutral hybrid equations of state for neutron stars. They present a first-order phase transition to quark matter and differentiate by the particle population considered and how these particles interact. While some equations of state contain just nucleons and up, down-quarks, others also contain hyperons, Delta baryons, and strange quarks. The hybrid equations of state, together with corresponding hadronic ones, are available on the CompOSE repository and can be used for different astrophysical applications.