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Multi-physics constraints at different densities to probe nuclear symmetry energy in hyperonic neutron stars

Multi-physics constraints at different densities to probe nuclear symmetry energy in hyperonic neutron stars
Multi-physics constraints at different densities to probe nuclear symmetry energy in hyperonic neutron stars
The appearance of strangeness in the form of hyperons within the inner core of neutron stars is expected to affect its detectable properties such as its global structure or gravitational wave emission. In this work, we explore the parameter space of hyperonic stars within the framework of the Relativistic Mean Field model allowed by present uncertainties in state-of-the-art nuclear and hypernuclear experimental data. We impose multi-physics constraints at different density regimes to restrict the parameter space: Chiral effective field theory, heavy-ion collision data as well as multi-messenger astrophysical observations of neutron stars. We investigate possible correlations between empirical nuclear and hypernuclear parameters, particularly the symmetry energy and its slope, with observable properties of neutron stars. We do not find a correlation for the hyperon parameters and the astrophysical data. However, the inclusion of hyperons generates a tension between the astrophysical and heavy ion data constraining considerable the available parameter space.
astro-ph.HE, nucl-th
Ghosh, Suprovo
4408b6bd-fbf0-4ed7-a446-e602f5cca92d
Pradhan, Bikram Keshari
56ad03a9-f2e6-4eff-af52-e410110bde28
Chatterjee, Debarati
3e5440bf-b6de-40db-9bd5-b277f1112c2d
Schaffner-Bielich, Jürgen
121a13cf-581b-4f5e-912a-6256dac68e6d
Ghosh, Suprovo
4408b6bd-fbf0-4ed7-a446-e602f5cca92d
Pradhan, Bikram Keshari
56ad03a9-f2e6-4eff-af52-e410110bde28
Chatterjee, Debarati
3e5440bf-b6de-40db-9bd5-b277f1112c2d
Schaffner-Bielich, Jürgen
121a13cf-581b-4f5e-912a-6256dac68e6d

Ghosh, Suprovo, Pradhan, Bikram Keshari, Chatterjee, Debarati and Schaffner-Bielich, Jürgen (2022) Multi-physics constraints at different densities to probe nuclear symmetry energy in hyperonic neutron stars. Frontiers in Astronomy and Space Sciences, 9, [864294]. (doi:10.3389/fspas.2022.864294).

Record type: Article

Abstract

The appearance of strangeness in the form of hyperons within the inner core of neutron stars is expected to affect its detectable properties such as its global structure or gravitational wave emission. In this work, we explore the parameter space of hyperonic stars within the framework of the Relativistic Mean Field model allowed by present uncertainties in state-of-the-art nuclear and hypernuclear experimental data. We impose multi-physics constraints at different density regimes to restrict the parameter space: Chiral effective field theory, heavy-ion collision data as well as multi-messenger astrophysical observations of neutron stars. We investigate possible correlations between empirical nuclear and hypernuclear parameters, particularly the symmetry energy and its slope, with observable properties of neutron stars. We do not find a correlation for the hyperon parameters and the astrophysical data. However, the inclusion of hyperons generates a tension between the astrophysical and heavy ion data constraining considerable the available parameter space.

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More information

Accepted/In Press date: 28 February 2022
Published date: 28 March 2022
Keywords: astro-ph.HE, nucl-th

Identifiers

Local EPrints ID: 500691
URI: http://eprints.soton.ac.uk/id/eprint/500691
PURE UUID: aea517c5-ac38-466c-8864-ccb2e54287db
ORCID for Suprovo Ghosh: ORCID iD orcid.org/0000-0002-1656-9870

Catalogue record

Date deposited: 09 May 2025 17:00
Last modified: 22 Aug 2025 02:46

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Contributors

Author: Suprovo Ghosh ORCID iD
Author: Bikram Keshari Pradhan
Author: Debarati Chatterjee
Author: Jürgen Schaffner-Bielich

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