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Deconfinement Phase Transition Heating and Thermal Evolution of Neutron Stars

By Kang Miao, Pan Na-na and Wang Xiaodong

Abstract

The deconfinement phase transition will lead to the release of latent heat during spins down of neutron stars if the transition is the first-order one. We have investigated the thermal evolution of neutron stars undergoing such deconfinement phase transition. The results show that neutron stars may be heated to higher temperature.This feature could be particularly interesting for high temperature of low-magnetic field millisecond pulsar at late stage. Probing the equation of state (EOS) of neutron star matter is a urgent task in studying compact stars. Both the determination of mass-radius relation(1)(2) and spin evolution of compact stars (3)(4)(5)(6)(7)(8)are usual methods. Neutron stars (NSs) cooling is another important tool for the study of dense matter(9)(10). By comparing cooling models with thermal emission data from observations, we can gain insight into the EOS of dense matter inside NSs. Heating source inside the stars is an important factor effect in the cooling of NSs. It is known that a NS will spin down due to braking (e.g. electric-magnetic radiation or gravitational wave radiation). The deconfinement phase transition from hadronic matter to quar

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