论文标题
高红移哈勃图能否在宇宙学方法的背景下排除宇宙学的标准模型?
Can high-redshift Hubble diagrams rule out the standard model of cosmology in the context of cosmographic method?
论文作者
论文摘要
使用基于宇宙学标准模型生成的IA型超新星(SNIA)和类星体(SNIA)和类星体(QSO)的模拟数据,并使用基于Markov-Chain-Monte-Carlo(MCMC)算法的最小二乘方法,我们首先根据宇宙学的构造构建量的构造,以构造的方式构造,并构造宇宙学参数。 $ 4^{th} $和$ 5^{th} $订单扩展以及pade(2,2)和(3,2)的哈勃参数的多项式。然后,我们重建了cosmographic方法框架中的距离模量,并计算了掌握方法的距离模量与标准模型的距离模量之间的百分比差。当使用胶合近似时,将百分比差异最小化,这意味着即使在高红移下,胶合界方法也足够适合重建距离模量。在下一步中,使用实际观察数据来用于SNIA,QSO,QSO,γ-射线燃烧(GRB)的哈勃图表,并在两组低红色组合(SNIA+QSOS+QSOS+QSOS+QSOS+GRBS+grbs+grbs+bao)中<2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.2.26组合(SNIA+QSOS+GRB)覆盖了$ 0.01 <z <5.5 $的红移范围,我们对Pade Cosmography的cosmogrogron参数以及标准模型都放置了观察性约束。我们的分析表明,Pade Cosmographic方法并未揭示标准模型和观察数据之间的任何cosmographing张力。我们还使用统计AIC标准确认了这一结果。最后,我们将COSMography方法放入Redshift-bin数据中,并找到从$ S_0 $参数提取的$ω__{M0} $的较大值,与$ Q_0 $参数和Planck- $λ$ CDM值相比。
Using mock data for the Hubble diagrams of type Ia supernovae (SNIa) and quasars (QSOs) generated based on the standard model of cosmology, and using the least-squares method based on the Markov-Chain-Monte-Carlo (MCMC) algorithm, we first put constraints on the cosmographic parameters in the context of the various model-independent cosmographic methods reconstructed from the Taylor $4^{th}$ and $5^{th}$ order expansions and the Pade (2,2) and (3,2) polynomials of the Hubble parameter, respectively. We then reconstruct the distance modulus in the framework of cosmographic methods and calculate the percentage difference between the distance modulus of the cosmographic methods and that of the standard model. The percentage difference is minimized when the Pade approximation is used which means that the Pade cosmographic method is sufficiently suitable for reconstructing the distance modulus even at high-redshifts. In the next step, using the real observational data for the Hubble diagrams of SNIa, QSOs, gamma-ray-bursts (GRBs), and observations from baryon acoustic oscillations (BAO) in two sets of the low-redshift combination (SNIa+QSOs+GRBs+BAO) embracing the redshift range of $0.01<z<2.26$ and the high-redshift combination (SNIa+QSOs+GRBs) which covers a redshift range of $0.01< z < 5.5$, we put observational constraints on the cosmographic parameters of the Pade cosmography and also the standard model. Our analysis indicates that Pade cosmographic approaches do not reveal any cosmographic tension between the standard model and the observational data. We also confirm this result, using the statistical AIC criteria. Finally, we put the cosmographic method in the redshift-bin data and find a larger value of $Ω_{m0}$ extracted from $s_0$ parameter compared with those of the $q_0$ parameter and Planck-$Λ$CDM values.