摘要
通过相对论平均场模型以及弱相互作用理论研究∑超子对中子星的影响。结果表明,∑超子对三种介子场均有影响,进而改变了中子星内部的粒子分布、质量——半径关系等。∑超子在冷却方面的效应更加明显,一方面,它们改变电子和μ子的直接Urca过程的发生范围,另一方面也使得中微子发射率大幅降低,因此∑超子可能并不利于中子星冷却。
From the relativistic mean field model and the theory of weak interactions, the effects of ∑ hyperons on neutron stars are studied. Results show that ∑ hyperons have effects on the three meson fields. They change the particle distribution and mass-radius relation of neutron stars. The effects of ~ on the cooling of neutron stars are obviouly. The density ranges where direct lerca processes of both electorns and muons are allowed can be changed. On the other hand, ∑ hyperons lower the neutrino emissivity obviously, so it maybe not suitable for the fast cooling of neutron stars.
出处
《青岛大学学报（自然科学版）》
CAS
2011年第2期20-23,共4页
Journal of Qingdao University(Natural Science Edition)
