Compact star of holographic nuclear matter and GW170817

Kilar Zhang, Takayuki Hirayama, Ling Wei Luo, Feng Li Lin

研究成果: 雜誌貢獻文章

1 引文 斯高帕斯(Scopus)

摘要

We use a holographic model of quantum chromodynamics to extract the equation of state (EoS) for the cold nuclear matter of moderate baryon density. This model is based on the Sakai-Sugimoto model in the deconfined Witten's geometry with the additional point-like D4-brane instanton configuration as the holographic baryons. Our EoS takes the following doubly-polytropic form: ϵ=2.629A−0.192p1.192+0.131A0.544p0.456 with A a tunable parameter of order 10−1, where ϵ and p are the energy density and pressure, respectively. The sound speed satisfies the causality constraint and breaks the sound barrier. We solve the Tolman-Oppenheimer-Volkoff equations for the compact stars and obtain the reasonable compactness for the proper choices of A. Based on these configurations we further calculate the tidal deformability of the single and binary stars. We find our results agree with the inferred values of LIGO/Virgo data analysis for GW170817.

原文英語
文章編號135176
期刊Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
801
DOIs
出版狀態已發佈 - 2020 二月 10

    指紋

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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