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

Modeling Hybrid Stars with an SU(3) non-linear sigma model
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使用 SU(3) 非线性 sigma 模型对混合星进行建模

DOI:
10.1103/physrevc.82.035803
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发表时间:
2010
期刊:
影响因子:
3.1
通讯作者:
S. Schramm
S. Schramm
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
R. Negreiros;V. Dexheimer;S. Schramm

文献摘要

被引文献

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利用扩展的强子-夸克SU(3)非线性sigma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,从强子到夸克的自由度自然变化。在零温度下,我们重现了大质量中子星,在非旋转情况下,其混合物质核心为2公里,在赤道和极地方向上,以开普勒频率旋转的恒星(物理情况介于两者之间)分别为1.18和0.87公里。本文还分析了这类恒星的冷却过程。
We study the behavior of hybrid stars by using an extended hadronic and quark SU(3) nonlinear 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, which contain cores of hybrid matter of 2 km for the nonrotating case and 1.18 and 0.87 km, in the equatorial and polar directions, respectively, for stars that rotate at the Kepler frequency (physical cases lie in between). The cooling of such stars is also analyzed.