Hadronic matter phases and their application to rapidly rotating neutron stars

14th International Conference on Topics in Astroparticle and Underground Physics

物理学;天文学

Endo, Tomoki^1

Division of Physics, Department of General Education, National Institute of Technology, Kagawa College, 355 Chokushi-cho, Takamatsu, Kagawa

761-8058, Japan^1

关键词: Astronomical objects;    Equation of state;    Hadronic matters;    High temperature;    Macroscopic phenomena;    Rotation effect;    Strong magnetic fields;    Theoretical study;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/718/5/052010/pdf
DOI  :  10.1088/1742-6596/718/5/052010

学科分类：天文学(综合)

来源: IOP

【 摘 要 】

Neutron stars are commonly considered as astronomical objects having high-density interiors and an inner core region in which various hadronic matter phases are expected. Several studies show that the inner structures affect macroscopic phenomena of the star. However, we know that the inner structures of the star strongly depend on the equation of state (EOS). The EOS of high-density matter is still not clear and several recent observations indicate restrictions to EOSs. Theoretical studies should elucidate EOSs at high density and/or high temperature. For instance, many theoretical studies have attempted to account for the rotation effect of rapidly rotating neutron stars (i.e., pulsars). Accordingly, we also apply our EOSs to rapidly rotating stars. Furthermore, neutron stars generate a strong magnetic field. Several recent studies indicate that this magnetic field exerts restrictions on the EOS. In this paper, we focus on the investigation of the inner structures and the application of our EOSs to rotating stars. We find that one of our EOSs is consistent with observations, and another is inconsistent. We also find an important relation between the radius and rotation.