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arXiv 2408.01006hep-phastro-ph.HEastro-ph.SRgr-qcnucl-th
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暗能量对中子星结构的影响:真空情形

Impact of dark energy on the structure of neutron stars: The vacuum case

L. F. Araujo, J. A. S. Lima, G. Lugones

AI总结:

本文通过在中子星内部引入不均匀分布的真空能量成分并结合现代核物质状态方程,研究了暗能量对质量-半径关系及最大质量的影响,并讨论了多信使观测对真空能量数量的约束。

摘要:

本文研究了宇宙真空暗成分在中子星性质中的潜在作用。假设中子星内部静态、球对称的物质分布由两种不同成分支撑:普通物质和真空流体。对于普通物质,我们采用一组基于核物理实验的最先进的核物质状态方程。真空能量成分在星体内部分布不均匀,并遵循标准状态方程($p_v = -ε_v$)。该成分由能量密度分数 $y = ε_m/(ε_m + ε_v)$ 表征,我们将其建模为常数或随半径变化。研究发现,引入真空能量会显著影响中子星的质量-半径关系,既影响可达到的最大质量,也影响这些关系的定性形式。本文还讨论了当前多信使观测数据对中子星内部真空能量数量的若干限制。

英文摘要:

The potential role of a cosmic vacuum dark component in the properties of neutron stars is investigated. It is assumed that the static, spherically symmetric distribution of matter within neutron stars is supported by two distinct components: ordinary matter and a vacuum fluid. For normal matter we use a set of state-of-the-art nuclear matter equations of state, each grounded in nuclear physics experiments. The vacuum energy component is inhomogeneously distributed within the star and obeys the standard equation of state ($p_v = -ε_v$). This is characterized by an energy density fraction $y = ε_m/ (ε_m + ε_v)$, which we model as either a constant or radius-dependent. Our findings reveal that the inclusion of vacuum energy significantly affects the mass-radius relationships in neutron stars, influencing both the maximum achievable masses and the qualitative form of these relationships. Some constraints from current multimessenger observational data limiting the amount of vacuum energy within neutron stars are also discussed.

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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