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Estimating the Variation of Neutron Star Observables by Dense Symmetric Nuclear Matter Properties

1
Department for Theoretical Physics, Wigner Research Centre for Physics of the Hungarian Academy of Sciences, H-1121 Budapest, Hungary
2
Institute of Physics, Eötvös Loránd University, H-1117 Budapest, Hungary
*
Author to whom correspondence should be addressed.
Universe 2019, 5(6), 153; https://doi.org/10.3390/universe5060153
Received: 1 May 2019 / Revised: 10 June 2019 / Accepted: 12 June 2019 / Published: 14 June 2019
(This article belongs to the Special Issue The Zimányi School and Analytic Hydrodynamics in High Energy Physics)
Recent multi-channel astrophysics observations and the soon-to-be published new measured electromagnetic and gravitation data provide information on the inner structure of the compact stars. These macroscopic observations can significantly increase our knowledge on the neutron star enteriors, providing constraints on the microscopic physical properties. On the other hand, due to the masquarade problem, there are still uncertainties on the various nuclear-matter models and their parameters as well. Calculating the properties of the dense nuclear matter, effective field theories are the most widely-used tools. However, the values of the microscopical parameters need to be set consistently to the nuclear and astrophysical measurements. In this work, we investigate how uncertainties are induced by the variation of the microscopical parameters. We use a symmetric nuclear matter in an extended σ - ω model to see the influence of the nuclear matter parameters. We calculate the dense matter equation of state and give the mass-radius diagram for a simplistic neutron star model. We present that the Landau mass and compressibility modulus of the nuclear matter have definite linear relation to the maximum mass of a Schwarzschild neutron star. View Full-Text
Keywords: dense matter; stars: neutron; equation of state; astro-particle physics dense matter; stars: neutron; equation of state; astro-particle physics
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Pósfay, P.; Barnaföldi, G.G.; Jakovác, A. Estimating the Variation of Neutron Star Observables by Dense Symmetric Nuclear Matter Properties. Universe 2019, 5, 153.

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