检验一个新的 Amati 相关伽马射线暴数据汇编的可标准化性并从中导出宇宙学约束
Testing the standardizability of, and deriving cosmological constraints from, a new Amati-correlated gamma-ray burst data compilation
AI总结:
该研究在六种暗能量模型中检验含220个GRB的更新Amati相关数据汇编,证明其可标准化用于宇宙学分析,但其 $Ω_{m0}$ 约束多与 $H(z)$+BAO 存在 >2σ 张力,不宜联合约束。
摘要:
通过使用伽马射线暴(GRB)数据,在六个空间平坦和非平坦暗能量宇宙学模型中同时约束 Amati 相关参数和宇宙学参数,我们表明,Jia 等人[Mon. Not. R. Astron. Soc. 516, 2575 (2022)] GRB 数据汇编的更新版 220 个 GRB 版本可通过 Amati 相关进行标准化,因此可用于宇宙学分析。然而,对于我们考虑的大多数宇宙学模型,由此得到的 GRB 数据对非相对论性物质密度参数当前值 $Ω_{m0}$ 的约束,与对更成熟的哈勃参数 [$H(z)$] 和重子声学振荡(BAO)数据进行联合分析所得结果存在 >2σ 的张力,这表明这些 GRB 数据不能与更成熟的 $H(z)$ + BAO 数据联合用于约束宇宙学参数。
英文摘要:
By using gamma-ray burst (GRB) data to simultaneously constrain Amati correlation parameters and cosmological parameters in six spatially-flat and nonflat dark energy cosmological models, we show that an updated 220 GRB version of the Jia et al. [Mon. Not. R. Astron. Soc. 516, 2575 (2022)] GRB data compilation are standardizable through the Amati correlation and so can be used for cosmological analyses. However, the resulting GRB data constraints on the current value of the nonrelativistic matter density parameter, $Ω_{m0}$, are in $>2σ$ tension with those from a joint analysis of better-established Hubble parameter [$H(z)$] and baryon acoustic oscillation (BAO) data for most of the cosmological models we consider, indicating that these GRB data cannot be jointly used with better-established $H(z)$ + BAO data to constrain cosmological parameters.
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