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arXiv 2104.01614astro-ph.CO
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强透镜系统和星系团观测对宇宙距离对偶关系的探索

Strong lensing systems and galaxy cluster observations as probe to the cosmic distance duality relation

R. F. L. Holanda, F. S. Lima, Akshay Rana, Deepak Jain

摘要:

{In本文利用大尺度结构观测结果检验了宇宙距离对偶关系(CDDR)$D_{\rm L}(1+z)^{-2}/D_{\rm A}=η(z)$ }的红移依赖性,其中$D_{\rm L}$和$D_{\rm A}$分别为光度和角直径距离。为了进行测试,考虑了以下数据集:强透镜系统和星系团测量(气体质量分数)。没有采用特定的宇宙学模型,只假设宇宙是平坦的。{通过考虑两种$η(z)$参数化,观察到CDDR在$1.5σ$内保持红移无关,这与最近其他涉及宇宙学数据的检验完全一致}。值得注意的是,我们的结果与星系团的重子预算无关。

英文摘要:

{In this paper, we use large scale structure observations to test the redshift dependence of cosmic distance duality relation (CDDR), $D_{\rm L}(1+z)^{-2}/D_{\rm A}=η(z)$}, with $D_{\rm L}$ and $D_{\rm A}$, being the luminosity and angular diameter distances, respectively. In order to perform the test, the following data set are considered: strong lensing systems and galaxy cluster measurements (gas mass fractions). No specific cosmological model is adopted, only a flat universe is assumed. { By considering two $η(z)$ parametrizations, It is observed that the CDDR remain redshift independent within $1.5σ$ which is in full agreement with other recent tests involving cosmological data}. It is worth to comment that our results are independent of the baryon budget of galaxy clusters.

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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