arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1006.0380astro-ph.SRastro-ph.HE
收藏

用SU(3)非线性西格玛模型模拟混合星

Modeling Hybrid Stars with an SU(3) non-linear sigma model

Rodrigo Picanco Negreiros, V. A. Dexheimer, S. Schramm

摘要:

我们用扩展的强子和夸克SU(3)非线性西格玛模型研究了混合星的行为。在这个模型中,随着密度/温度的增加,自由度自然地从强子变化到夸克。在零温度下,我们再现大质量的中子星包含2公里的混合物质的核心的非旋转的情况下,1.18公里和0.87公里,在赤道和极地方向,分别为恒星旋转开普勒频率(物理情况下躺在两者之间)。还分析了这类恒星的冷却。

英文摘要:

We study the behavior of hybrid stars using an extended hadronic and quark SU(3) non-linear sigma model. The degrees of freedom change naturally, in this model, from hadrons to quarks as the density/temperature increases. At zero temperature, we reproduce massive neutron stars containing a core of hybrid matter of 2 km for the non-rotating case and 1.18 km and 0.87 km, in the equatorial and polar directions respectively, for stars rotating at the Kepler frequency (physical cases lie in between). The cooling of such stars is also analyzed.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑