Abstract
Starting from the relativistic realistic nucleon-nucleon () interactions, the relativistic Brueckner-Hartree-Fock (RBHF) theory in the full Dirac space is employed to study neutron star properties. First, the one-to-one correspondence relation for gravitational redshift and mass is established and used to infer the masses of isolated neutron stars by combining gravitational redshift measurements. Next, the ratio of the moment of inertia to mass times radius squared as a function of the compactness is obtained, and is consistent with the universal relations in the literature. The moment of inertia for pulsar PSR J07373039A is predicted to be , and by the RBHF theory in the full Dirac space with interactions Bonn A, B, and C, respectively. Finally, the quadrupole moment of neutron star is calculated under the slow-rotation and small-tidal-deformation approximation. The equations of state constructed by the RBHF theory in the full Dirac space, together with those by the projection method and momentum-independence approximation, conform to universal -Love- relations as well. By combing the tidal deformability from GW170817 and the universal relations from relativistic ab initio methods, the moment of inertia of a neutron star with 1.4 solar mass is also deduced as .
- Received 20 June 2022
- Revised 29 August 2022
- Accepted 20 September 2022
DOI:https://doi.org/10.1103/PhysRevC.106.045804
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