On the Speed of Sound in Hyperonic Stars

We build upon the remarkable, model independent constraints on the equation of state of dense baryonic matter established recently by Annala et al. [1]. Using the quark-meson coupling model, an approach to nuclear structure based upon the self-consistent adjustment of hadron structure to the local m...

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Bibliographic Details
Published in:arXiv.org 2021-02
Main Authors: Motta, T F, Guichon, P A M, Thomas, A W
Format: Article
Language:English
Subjects:
Constraint modelling
Equations of state
Hyperons
Neutron stars
Nuclear structure
Quarks
Online Access:Get full text
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Summary:We build upon the remarkable, model independent constraints on the equation of state of dense baryonic matter established recently by Annala et al. [1]. Using the quark-meson coupling model, an approach to nuclear structure based upon the self-consistent adjustment of hadron structure to the local meson fields, we show that, once hyperons are allowed to appear in dense matter in \b{eta}-equilibrium, the equation of state is consistent with those constraints. As a result, while one cannot rule out the occurence of quark matter in the cores of massive neutron stars, the available constraints are also compatible with the presence of hyperons.
ISSN:2331-8422
DOI:10.48550/arxiv.2009.10908