A comparative study of Compact Objects using 3 models: Walecka Model, PAL Model, and M.I.T. Bag Model

TL;DR

This paper compares three models—Walecka, PAL, and M.I.T. Bag—to study the structure of neutron and strange stars, analyzing mass-radius relations and comparing results with recent pulsar observations.

Contribution

It provides a comparative analysis of different equations of state for compact objects using three distinct models, including recent observational data.

Findings

Mass-radius relations for neutron and strange stars obtained.

Results consistent with observed pulsar PSR J1614-2230.

Different models show varying predictions for star properties.

Abstract

Compact objects are the name used to classify the following objects: white dwarf, neutron star and black holes. In addition to them, some authors have suggested that in the core of a neutron star we may have the quarks u,d,s and c. In this work we investigate the structure of neutron star and strange star, described by the Tolman-Openheimer-Volkof equations. For the neutron star, we used the relativistic EoS from Walecka's model and the non-relativistic EoS PAL model. For the strange star, we used the M.I.T. bag model. We obtain results for the mass-radius relation and then we compared ours results with the actual pulsar data recently observed PSR J1614-2230 with a mass $1.97\pm 0.04\ M_{\odot}$.