论文标题
使用校准的GRB相关性的运动学约束超过$ z \ simeq0 $
Kinematic constraints beyond $z\simeq0$ using calibrated GRB correlations
论文作者
论文摘要
使用来自伽马射线爆发的高红移数据对宇宙的动力学进行了修订，以通过模型无关的技术来限制掌握参数。考虑到四个伽马射线爆发相关性和两个层次结构的样本，分别为$ j_0 $和$ s_0 $，我们在宇宙的扩展历史上得出了限制。由于宇宙数据跨越$ z \ simeq0 $之外，因此我们研究了其他辅助方法，例如辅助变量和padé近似。使用beziér多项式来校准我们的相关性并治愈循环问题。在与独立于模型的Amati，Ghirlanda，Yonetoku和组合相关性上进行了几个马尔可夫链蒙特卡洛模拟，以获得$ 1 $ - $σ$和$ 2 $ - $σ$置信度和测试标准宇宙学模型。发现合理的结果最多可达$ j_0 $和$ s_0 $层次结构，仅部分减轻了本地$ H_0 $测量的张力，因为$ j_0 $层次结构被考虑。有关系统错误的讨论已在此处进行广泛报道。我们的发现表明，$λ$ CDM型号未通过伽马射线爆发完全确认。对针对真正的宇宙常数的指示进行了详细的总结和评论。
The dynamics of the Universe are revised using high-redshift data from gamma-ray bursts to constrain cosmographic parameters by means of model-independent techniques. Considering samples from four gamma-ray burst correlations and two hierarchies up to $j_0$ and $s_0$, respectively, we derived limits over the expansion history of the Universe. Since cosmic data span outside $z\simeq0$, we investigated additional cosmographic methods such as auxiliary variables and Padé approximations. Beziér polynomials were employed to calibrate our correlations and heal the circularity problem. Several Markov chain Monte Carlo simulations were performed on the model-independently calibrated Amati, Ghirlanda, Yonetoku, and combo correlations to obtain $1$--$σ$ and $2$--$σ$ confidence levels and to test the standard cosmological model. Reasonable results are found up to $j_0$ and $s_0$ hierarchies, respectively, only partially alleviating the tension on local $H_0$ measurements as $j_0$ hierarchy is considered. Discussions on systematic errors have been extensively reported here. Our findings show that the $Λ$CDM model is not fully confirmed using gamma-ray bursts. Indications against a genuine cosmological constant are summarized and commented on in detail.
