The Possibility Of△Resonances In Neutron Stars

The neutron star as material natural laboratory，has been a hot issue dtudied by manyscholars.On the one hand,in the framework of the relativistic mean field theory,the influences ofΔ resonances for composed of different substance particle distribution of neutron stars andmass-radius relation, finally judge a possibility of Δ resonances in neutron stars. On the otherhand, the weak interaction theory as the foundation, study the process of a resonance on coolingof neutron stars. Finally, introduction a pulsar J1614-2230, and analyzes its internal existence ofΔ resonances and its cooling properties. The results show that, Δresonances can exist indifferent particle composition of the interior of neutron stars, and the neutron stars equation ofstate can not be ignored; Δresonances on cooling effect is relatively complex, its main effect isto reduce the neutrino emission rate and luminosity.The main contents are as follows:In Chapter1, the history of development of neutron stars, the neutron star properties, aswell as at home and abroad to the neutron stars’research present situation, and put forward theprospects for the future.In Chapter2, introduces basic theory, analysis the possibility of Δresonances in traditionalneutron stars matter and hyperonic neutron star matter, research the influences of Δresonanceson neutron stars.In Chapter3,basicΔresonances can arise in antikaon condensates. AnalysisΔresonances inantikaon matter, and to study the effects on neutron stars.In Chapter4, introduces the cooling theory of neutron stars, discuss The effects of Δresonances on the neutrino emissivity from the direct URCA process of nucleons, and theneutrino luminosity and the cooling curve.In Chapter5，introduces pulsar J1614-2230, give their existing radial range, particle numberratio, cooling and other properties.