https://doi.org/10.1140/epjc/s10052-020-08779-x
Regular Article – Theoretical Physics (CE siehe acceptance letter / OriginalPaper)
The possibility of twin star solutions in a model based on lattice QCD thermodynamics
1
School of Physics and Astronomy, Monash University Clayton, Clayton, Australia
2
Institut für Theoretische Physik, Goethe Universität, Frankfurt am Main, Germany
3
Frankfurt Institute for Advanced Studies, Giersch Science Center, Frankfurt am Main, Germany
4
GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
Received:
26
April
2020
Accepted:
19
December
2020
Published online:
18
January
2021
The properties of compact stars and in particular the existence of twin star solutions are investigated within an effective model that is constrained by lattice QCD thermodynamics. The model is modified at large baryon densities to incorporate a large variety of scenarios of first order phase transitions to a phase of deconfined quarks. This is achieved by matching two different variants of the bag model equation of state, in order to estimate the role of the Bag model parameters on the appearance of a second family of neutron stars. The produced sequences of neutron stars are compared with modern constrains on stellar masses, radii, and tidal deformability from astrophysical observations and gravitational wave analyses. It is found that those scenarios in our analysis, in which a third family of stars appeared due to the deconfinement transition, are disfavored from astrophysical constraints.
© The Author(s) 2021
Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
Funded by SCOAP3
