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arXiv 2602.06170astro-ph.HEnucl-th
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中子星观测指向奇异物质:现有解释与一种前景性提案

How Neutron Star Observations Point Towards Exotic Matter: Existing Explanations and a Prospective Proposal

Facultad de Ciencias Astronómicas y Geofísicas, Universidad Nacional de La Plata(拉普拉塔国立大学天文与地球物理学院);Consejo Nacional de Investigaciones Científicas y Técnicas(国家科学研究委员会)

Mauro Mariani, Ignacio F. Ranea-Sandoval

AI总结:

本文提出一种缓慢稳定的混合星模型,以解释中子星观测中对奇异物质存在的支持,并探讨其在方程组参数调整中的挑战。

摘要:

多信使天文学观测揭示中子星,结合来自致密物质微观物理的更精确计算和约束,正在与用于描述中子星核心的方程组模型产生矛盾。假设存在一个突然的一阶相变,且相之间转换缓慢,我们提出不同的缓慢稳定的混合星配置,旨在同时满足所有当前约束;在此框架下,我们还引入了一种新的非CSS参数化方法用于夸克物质的方程组,并讨论其优缺点。我们分析我们的模型结果,并回顾文献中其他相关的理论可能性。我们发现现代中子星观测似乎倾向于支持某些类型的奇异物质存在于中子星核心;特别是,我们的缓慢稳定的混合星情景仍是一个能够满足这些约束的提案。然而,由于大多数极端中子星测量中所采用的一些假设受到现有怀疑,以及方程组参数所需的精确调整,仍然存在显著的矛盾和开放性问题。

英文摘要:

Multi-messenger astronomical observations of neutron stars, together with more precise calculations and constraints coming from dense matter microphysics, are generating tension with regard to equations of state models used to describe neutron star cores. Assuming an abrupt first-order phase transition with a slow conversion speed between phases, we propose different slow stable hybrid star configurations aiming to reconcile all current constraints simultaneously; within this framework, we also introduce a novel non-CSS parametrization to the quark matter equation of state and discuss its strengths and limitations. We analyze our model results in conjunction with a review of other relevant theoretical possibilities existing in the literature. We found that modern neutron star observations seem to favor the existence of some type of exotic matter in the neutron star cores; in particular, our slow stable hybrid star scenario remains a proposal capable of satisfying these constraints. However, due both to the existing skepticism regarding some of the adopted hypotheses in most extreme neutron star measurements and to the precise adjustment needed for the equation-of-state parameters, significant tension and open questions remain.

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。

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