Thermal Evolution of Neutron Stars in 2 Dimensions

Abstract

There are many factors that contribute to the breaking of the spherical symmetry of a neutron star. Most notably is rotation, magnetic fields, and/or accretion of matter from companion stars. All these phenomena influence the macroscopic structures of neutron stars, but also impact their microscopic compositions. The purpose of this paper is to investigate the cooling of rotationally deformed, two-dimensional (2D) neutron stars in the framework of general relativity theory, with the ultimate goal of better understand the impact of 2D effects on the thermal evolution of such objects. The equations that govern the thermal evolution of rotating neutron stars are presented in this paper. The cooling of neutron stars with different frequencies is computed self-consistently by combining a fully general relativistic 2D rotation code with a general relativistic 2D cooling code. We show that rotation can significantly influence the thermal evolution of rotating neutron stars. Among the major new aspects are the appearances of hot spots on the poles, and an increase of the thermal coupling times between the core and the crust of rotating neutron stars. We show that this increase is independent of the microscopic properties of the stellar core, but depends only on the frequency of the star.

8 pages, 6 figures, revised version

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Cited by in corpus (14)

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• Cooling of Small and Massive Hyperonic Stars
• On the Transport Properties of a Quark-Hadron Coulomb Lattice in the Cores of Neutron Stars
• Compactness in the Thermal Evolution of Twin Stars
• Strange Quark Stars as Probe of Dark Matter
• Crust effects and the cooling relaxation time in highly magnetized neutron stars
• Standard cooling of rapidly rotating isolated neutron stars in 2D
• Thermal evolution of neutron stars with global and local neutrality
• Heat propagation in rotating relativistic bodies
• Rotational Properties of Inverted Hybrid Stars
• An Investigation into Surface Temperature Distributions of High-B Pulsars
• The initial data of effective field theories of relativistic viscous fluids and gravity
• Short-range correlation effects on the neutron star cooling
• Structure and Cooling of Neutron and Hybrid Stars