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arXiv 2105.03318nucl-thastro-ph.HEhep-ph
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意大利面阶段的波动

Fluctuations in the pasta phase

Mateus R. Pelicer, Débora P. Menezes, Celso C. Barros, Francesca Gulminelli

摘要:

接近饱和密度的重子物质很可能呈现复杂的非均匀结构,统称为pasta相。在有限的温度下,不同的几何结构预计将共存,对中子星地壳的导电性和中微子在超新星物质中的传输的潜在后果。在一个统计的多组分方法的框架中,我们计算的组成物质在面食阶段考虑密度,质子分数,和几何形状的波动。使用一个现实的能量泛函从相对论平均场论和温度和同位旋依赖的表面张力拟合从Pastas-Fermi计算,我们表明,不同的几何形状可以共存于一个大部分的意大利面相,下到温度的顺序的结晶温度的中子星地壳。定量估计的电荷波动。

英文摘要:

Baryonic matter close to the saturation density is very likely to present complex inhomogeneous structures collectively known under the name of pasta phase. At finite temperature, the different geometric structures are expected to coexist, with potential consequences on the neutron star crust conductivity and neutrino transport in supernova matter. In the framework of a statistical multi-component approach, we calculate the composition of matter in the pasta phase considering density, proton fraction, and geometry fluctuations. Using a realistic energy functional from relativistic mean field theory and a temperature and isospin dependent surface tension fitted from Thomas-Fermi calculations, we show that different geometries can coexist in a large fraction of the pasta phase, down to temperatures of the order of the crystallization temperature of the neutron star crust. Quantitative estimates of the charge fluctuations are given.

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