Estimating Microscopic Nuclear Data by Compact Star Observations

TL;DR

This paper uses observational data of pulsars and an extended nuclear model to estimate microscopic nuclear parameters like Landau mass and compressibility, linking astrophysical observations with nuclear physics.

Contribution

It introduces a method to estimate microscopic nuclear data from pulsar observations using an extended $\sigma$-$\omega$ model and the core approximation.

Findings

Estimated Landau mass: 752.46 MeV with uncertainties

Estimated compressibility: 261.7 MeV with uncertainties

Established linear relation between microscopic and macroscopic parameters

Abstract

We studied recent observation data of pulsar masses and radii of PSR J0740$+$6620, PSR J0348$+$0432, and PSR J1614$-$2230 from different measurements, based on the extended version of $\sigma $-$ \omega$ model. Throughout our analysis, we assumed that these pulsars are maximal-mass compact stars, thus we applied the core approximation. Based on the linear relation between the microscopic and macroscopic parameters of compact stars evaluated by our model, we estimated the average Landau mass $m_L = 752.46^{+49.1}_{-42.5}$ MeV and compressibility $K = 261.7^{+57.2}_{-28.0}$ MeV.