47th Vietnam Conference on Theoretical Physics (VCTP47)
Hội nghị Vật lý lý thuyết Việt Nam lần thứ 47
Tuy Hòa, 14 August 2022

ProgrammeO.13  Oral, VCTP47 Date: Thursday, 4 August 2022 Time: 11:35  12:00 Spin symmetry energy and equation of state of spinpolarized neutron star matterNguyen Hoang Dang Khoa (1), Ngo Hai Tan (2), Dao Tien Khoa (3) (1) University of Science and Technology of Hanoi; (2) Phenikaa University; (3) Institute of Nuclear Science and Technology The equation of state (EOS) of spinpolarized nuclear matter (NM) is studied within the HartreeFock (HF) formalism using the realistic densitydependent nucleonnucleon interaction. The present HF study shows a strong correlation between the spin symmetry energy and nuclear symmetry energy over the whole range of baryon densities. The important contribution of the spin symmetry energy to the EOS of the spinpolarized NM is found to be comparable with that of the nuclear symmetry energy to the EOS of the isospinpolarized or asymmetric (neutronrich) NM. Based on the HF energy density, the EOS of the spinpolarized (βstable) npeμ matter is obtained for the determination of the macroscopic properties of neutron stars (NS). A realistic density dependence of the spinpolarized fraction has been suggested to explore the impact of the spin symmetry energy on the gravitational mass M and radius R, as well as the tidal deformability of NS. Based on the empirical constrains inferred from a coherent Bayesian analysis of gravitational wave signals of the NS merger GW170817 and the observed masses of the heaviest pulsars, the present study shows the strong impact of the spin symmetry energy W , nuclear symmetry energy S, and nuclear incompressibility K on the EOS of nucleonic matter in magnetar. Presenter: Ngo Hai Tan 
Institute of Physics, VAST

Center for Theoretical Physics 
Center for Computational Physics
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