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arXiv 1901.04529nucl-th
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受GW170817约束的一致Skyrme参数化

Consistent Skyrme parametrizations constrained by GW170817

O. Lourenço, M. Dutra, C. H. Lenzi, S. K. Biswal, M. Bhuyan, D. P. Menezes

摘要:

研究了由核子和轻子组成的恒星物质在$β$ ~平衡和电中性条件下的高密度行为,证明了在$11$约束下Skyrme参数化与核物质、纯中子物质、对称能及其导数是一致的(CSkP)[Dutra { \it et al.},C 85,035201(2012)]。这些参数化的预测潮汐形变有关的GW 170817事件也检查。产生大质量中子星的CSkP给出了正则恒星半径的$11.86~\mbox{km} \leqslant R_{1.4} \leqslant 12.55~\mbox{km}$范围,与其他理论预测一致。结果表明,CSkP是兼容的质量和半径的区域从LIGO和Virgo合作(LVC)的最新数据的分析。无量纲的潮汐变形和半径的典型的明星之间的相关性,即$Λ_{1.4} \approx 3.16\times10^{-6}R_{1.4}^{7.35}$,与CSkP的结果兼容最近的范围$Λ_{1.4}=190_{-120}^{+390}$从LVC。对$Λ_1\timesΛ_2$图的分析表明,所有的CSkP都与LVC最近得到的边界相容.最后,验证了中子星转动惯量与形变能之间的普适关系,即\mbox{$I$-Love}关系,这与对\mbox{PSR J0737-3039}主分量脉冲星转动惯量的预言是一致的.

英文摘要:

The high-density behavior of the stellar matter composed of nucleons and leptons under $β$~equilibrium and charge neutrality conditions is studied with the Skyrme parametrizations shown to be consistent (CSkP) with the nuclear matter, pure neutron matter, symmetry energy and its derivatives in a set of $11$ constraints [Dutra {\it et al.}, Phys. Rev. C 85, 035201 (2012)]. The predictions of these parametrizations on the tidal deformabilities related to the GW170817 event are also examined. The CSkP that produce massive neutron stars give a range of $11.86~\mbox{km} \leqslant R_{1.4} \leqslant 12.55~\mbox{km}$ for the canonical star radius, in agreement with other theoretical predictions. It is shown that the CSkP are compatible with the region of masses and radii obtained from the analysis of recent data from LIGO and Virgo Collaboration (LVC). A correlation between dimensionless tidal deformability and radius of the canonical star is found, namely, $Λ_{1.4} \approx 3.16\times10^{-6}R_{1.4}^{7.35}$, with results for the CSkP compatible with the recent range of $Λ_{1.4}=190_{-120}^{+390}$ from LVC. An analysis of the $Λ_1\timesΛ_2$ graph shows that all the CSkP are compatible with the recent bounds obtained by LVC. Finally, the universal correlation between the moment of inertia and the deformability of a neutron star, named as the \mbox{$I$-Love} relation, is verified for the CSkP, that are also shown to be consistent with the prediction for the moment of inertia of the \mbox{PSR J0737-3039} primary component pulsar.

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