Study on the outer crust and macroscopic properties of neutron stars based on the Brueckner-Hartree-Fock theory

The equation of state of nuclear matter serves as the theoretical foundation for revealing the internal structure and evolutionary mechanisms of neutron stars. In this study, we employ the microscopic Brueckner-Hartree-Fock many-body theory with different nucleon-nucleon potentials and their self-consistent microscopic or phenomenological three-body nuclear forces, combined with the liquid-drop model, to investigate the composition of nuclides in the outer crust of neutron stars. By integrating equations of state for the inner crust, outer crust, and core, we systematically analyze macroscopic properties of neutron stars, including mass-radius relation, moment of inertia, and tidal deformability. The results demonstrate that the four constructed equations of state nearly satisfy various data constraints from pulsars, gravitational waves, NICER, etc., which provide theoretical references for further constraining nuclear matter properties through multi-messenger observations.