超子星中微子俘获的微观研究
Microscopic study of neutrino trapping in hyperon stars
摘要:
利用Nijmegen群重子-重子相互作用的最新参数化,在Brueckner-Bethe-Goldstone零温多体理论的框架下,研究了中微子俘获对中子星的组成、状态方程和结构的影响,这与描述出生后不久的中子星(质子中子星)的物理条件有关.我们发现,中微子的存在显着改变了物质的组成,推迟超子的出现,使状态方程僵硬。我们探讨了中微子捕获对中子星早期演化的影响,以及对超新星爆炸留下的最后致密残骸的性质的影响。
英文摘要:
Employing the most recent parametrization of the baryon-baryon interaction of the Nijmegen group, we investigate, in the framework of the Brueckner--Bethe--Goldstone many-body theory at zero temperature, the influence of neutrino trapping on the composition, equation of state, and structure of neutron stars, relevant to describe the physical conditions of a neutron star immediately after birth (protoneutron star). We find that the presence of neutrinos changes significantly the composition of matter delaying the appearance of hyperons and making the equation of state stiffer. We explore the consequences of neutrino trapping on the early evolution of a neutron star and on the nature of the final compact remnant left by the supernova explosion.
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