可能违反宇宙距离对偶关系的高红移宇宙学

IF 5.3 2区 物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS
José F. Jesus, Mikael J.S. Gomes, Rodrigo F.L. Holanda and Rafael C. Nunes
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引用次数: 0

摘要

在这项研究中,我们使用高红移(光度和角度)的几何距离,用pad方法进行宇宙分析,该方法稳定了这种红移状态下宇宙序列的行为。然而,在我们的分析中,我们没有假设宇宙距离对偶关系(CDDR)的有效性,而是允许潜在的违反,例如dL(z) = η(z)(1+z)2dA(z),其中考虑了η(z)的三种不同的函数形式。通过整合超新星(SN)、重子声学振荡(BAO)和宇宙天文钟(CC)的最新数据,我们获得了宇宙学模型的观测约束以及可能违反CDDR的约束。有趣的是,我们发现潜在的CDDR违规引入了宇宙学参数(如H0, q0和j0)之间的新的统计相关性。尽管如此,在这个框架内,我们没有观察到与CDDR的显著偏差,我们的结果与ΛCDM模型的预测保持一致。同时,这项工作提供了一种新颖而直接的方法,通过宇宙学技术固定背景演化来测试CDDR,为新的几何观测测试可能偏离标准宇宙学铺平了道路。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
High-redshift cosmography with a possible cosmic distance duality relation violation
In this study, we used geometric distances at high redshifts (both luminosity and angular) to perform a cosmographic analysis with the Padé method, which stabilizes the behaviour of the cosmographic series in this redshift regime. However, in our analyses, we did not assume the validity of the Cosmic Distance Duality Relation (CDDR), but allowed for potential violations, such as dL(z) = η(z)(1+z)2dA(z), where three different functional forms of η(z) are considered. By incorporating updated data from supernovae (SN), baryon acoustic oscillations (BAO), and cosmic chronometers (CC), we obtained observational constraints on cosmographic models alongside possible CDDR violations. Interestingly, we found that potential CDDR violations introduce new statistical correlations among cosmographic parameters such as H0, q0, and j0. Nonetheless, within this framework, we did not observe significant deviations from the CDDR, and our results remain consistent with the predictions of the ΛCDM model. In the same time, this work provides a novel and straightforward method for testing the CDDR by fixing the background evolution through cosmographic techniques, paving the way for new geometric observational tests of possible deviations from standard cosmology.
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来源期刊
Journal of Cosmology and Astroparticle Physics
Journal of Cosmology and Astroparticle Physics 地学天文-天文与天体物理
CiteScore
10.20
自引率
23.40%
发文量
632
审稿时长
1 months
期刊介绍: Journal of Cosmology and Astroparticle Physics (JCAP) encompasses theoretical, observational and experimental areas as well as computation and simulation. The journal covers the latest developments in the theory of all fundamental interactions and their cosmological implications (e.g. M-theory and cosmology, brane cosmology). JCAP''s coverage also includes topics such as formation, dynamics and clustering of galaxies, pre-galactic star formation, x-ray astronomy, radio astronomy, gravitational lensing, active galactic nuclei, intergalactic and interstellar matter.
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