Structures of Rotating Traditional Neutron Stars and Hyperon Stars in the Relativistic $σ-ω$ Model

Details Structures of Rotating Traditional Neutron Stars and Hyperon Stars in the Relativistic $σ-ω$ Model Structures of Rotating Traditional Neutron Stars and Hyperon Stars in the Relativistic $σ-ω$ Model

2003-09-06

arxiv.org/abs/astro-ph/0309199v1

Eur.Phys.J.A21:349-354,2004

Astronomy and Astrophysics

Astrophysics

10 pages, 10 figures

Scientific paper

10.1140/epja/i2003-10183-2

The influence of the rotation on the total masses and radii of the neutron stars are calculated by the Hartle's slow rotation formalism, while the equation of state is considered in a relativistic $\sigma-\omega$ model. Comparing with the observation, the calculating result shows that the double neutron star binaries are more like hyperon stars and the neutron stars of X-ray binaries are more like traditional neutron stars. As the changes of the mass and radius to a real neutron star caused by the rotation are very small comparing with the total mass and radius, one can see that Hartle's approximate method is rational to deal with the rotating neutron stars. If three property values: mass, radius and period are observed to the same neutron star, then the EOS of this neutron star could be decided entirely.

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