论文标题

伽马射线爆发基本平面相关性作为宇宙学工具

The Gamma-ray Bursts fundamental plane correlation as a cosmological tool

论文作者

Dainotti, M. G., Lenart, A. Ł., Chraya, A., Sarracino, G., Nagataki, S., Fraija, N., Capozziello, S., Bogdan, M.

论文摘要

宇宙学模型及其相应的参数因当前差异(由SNE IA获得的$ H_ {0} $与来自宇宙微波背景辐射的PLANCK数据)之间的当前差异而广泛争议。因此,考虑到高红移探针(例如伽马射线爆发(GRB))是必要的步骤。但是,使用其物理特​​征之间的GRB相关性来推断宇宙学参数很困难,因为GRB亮度范围跨越了几个数量级。在我们的工作中,我们在峰值及时亮度,X射线高原结束时的剩余时间及其在X射线中的相应亮度之间使用了3维关系:所谓的3D Dainotti基本平面关系。我们通过使用可靠的统计方法来考虑选择和进化效应来纠正这种关系,与先前的结果相比,$σ_{int} = 0.18 \ pm 0.07 $(47.1 \%),当我们采用特定的GRB的GRB,称为platinum样品。我们已经将GRB基本平面关系与高斯和统一的PRIOR一起用于宇宙学参数,并与SNE IA和BAO测量结合来推断宇宙学参数,例如$ h_ {0} $,宇宙中的物质密度,$ω__{M} $),以及Dark Energy commeter $ W $ W $ W $ W $ W $ W $ W $ WM $ WM $ WM $ WM $ WM $ W。我们的结果与$λ$ CDM模型给出的参数是一致的,但具有检测到$ z = 5 $的宇宙学探针的优势,比最远的SNE IA观察到的参数大得多。

Cosmological models and their corresponding parameters are widely debated because of the current discrepancy between the results of the Hubble constant, $H_{0}$, obtained by SNe Ia, and the Planck data from the Cosmic Microwave Background Radiation. Thus, considering high redshift probes like Gamma-Ray Bursts (GRBs) is a necessary step. However, using GRB correlations between their physical features to infer cosmological parameters is difficult because GRB luminosities span several orders of magnitude. In our work, we use a 3-dimensional relation between the peak prompt luminosity, the rest-frame time at the end of the X-ray plateau, and its corresponding luminosity in X-rays: the so-called 3D Dainotti fundamental plane relation. We correct this relation by considering the selection and evolutionary effects with a reliable statistical method, obtaining a lower central value for the intrinsic scatter, $σ_{int}=0.18 \pm 0.07$ (47.1 \%) compared to previous results, when we adopt a particular set of GRBs with well-defined morphological features, called the platinum sample. We have used the GRB fundamental plane relation alone with both Gaussian and uniform priors on cosmological parameters and in combination with SNe Ia and BAO measurements to infer cosmological parameters like $H_{0}$, the matter density in the universe ($Ω_{M}$), and the dark energy parameter $w$ for a $w$CDM model. Our results are consistent with the parameters given by the $Λ$CDM model but with the advantage of using cosmological probes detected up to $z=5$, much larger than the one observed for the furthest SNe Ia.

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