A neutron star with a strange quark star-like mass-radius relation

Arapoğlu A. S., Yükselci A. E.

PHYSICS OF THE DARK UNIVERSE, vol.28, 2020 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 28
  • Publication Date: 2020
  • Doi Number: 10.1016/j.dark.2020.100488
  • Journal Name: PHYSICS OF THE DARK UNIVERSE
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, INSPEC
  • Istanbul Technical University Affiliated: Yes

Abstract

We study the structure of spherically symmetric and static objects in the presence of a nonminimally coupled scalar field having a potential of the form V(phi) = -mu(2)phi(2)/2 + lambda phi(4)/4. We numerically solve equations of the system using two different realistic equations of state for neutron matter and give the mass-radius relations as well as the radial profiles of the scalar field, densities and the mass function for a sample configuration. We show that a specific solution type encountered in such systems causes characteristic neutron star mass-radius relations to turn into the ones belonging to strange quark stars. (C) 2020 Elsevier B.V. All rights reserved.