Imposing multi-physics constraints at different densities on the neutron Star Equation of State
Abstract
Neutron star matter spans a wide range of densities, from that of nuclei at the surface to exceeding several times normal nuclear matter density in the core. While terrestrial experiments, such as nuclear or heavy-ion collision experiments, provide clues about the behaviour of dense nuclear matter, one must resort to theoretical models of neutron star matter to extrapolate to higher density and finite neutron/proton asymmetry relevant for neutron stars. In this work, we explore the parameter space within the framework of the Relativistic Mean Field model allowed by present uncertainties compatible with state-of-the-art experimental data. We apply a cut-off filter scheme to constrain the parameter space using multi-physics constraints at different density regimes: chiral effective field theory, nuclear and heavy-ion collision data as well as multi-messenger astrophysical observations of neutron stars. Using the results of the study, we investigate possible correlations between nuclear and astrophysical observables.
- Publication:
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European Physical Journal A
- Pub Date:
- March 2022
- DOI:
- 10.1140/epja/s10050-022-00679-w
- arXiv:
- arXiv:2107.09371
- Bibcode:
- 2022EPJA...58...37G
- Keywords:
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- Astrophysics - High Energy Astrophysical Phenomena;
- Nuclear Theory
- E-Print:
- 19 pages, 15 figures