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arXiv 1105.1870astro-ph.CO
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基于宇宙观测数据的修正Chaobergin气体模型的组合约束:Markov Chain Monte Carlo方法

Combined constraints on modified Chaplygin gas model from cosmological observed data: Markov Chain Monte Carlo approach

Jianbo Lu, Lixin Xu, Yabo Wu, Molin Liu

摘要:

利用最新的观测数据:Ia型超新星(SNIa)的Union2数据集、哈勃观测数据(OHD)、星系团X射线气体质量分数、重子声振荡(BAO)和宇宙微波背景(CMB)数据,利用马尔可夫链蒙特卡罗方法研究了作为暗物质和暗能量统一的修正的Chaubergin气体(MCG)模型的全局约束.在平坦宇宙中,MCG模型的约束结果是,$Ω_{b}h^{2}=0.02263^{+0.00184}_{-0.00162}$($1σ$)$^{+0.00213}_{-0.00195}$ $(2σ)$,$B_{s}=0.7788^{+0.0736}_{-0.0723}$($1σ$)$^{+0.0918}_{-0.0904}$ $(2σ)$,$α=0.1079^{+0.3397}_{-0.2539}$($1σ$)$^{+0.4678}_{-0.2911}$ $(2σ)$,$B=0.00189^{+0.00583}_{-0.00756}$($1σ$)$^{+0.00660}_{-0.00915}$ $(2σ)$和$H_{0}=70.711^{+4.188}_{-3.142}$($1σ$)$^{+5.281}_{-4.149}$ $(2σ)$。

英文摘要:

We use the Markov Chain Monte Carlo method to investigate a global constraints on the modified Chaplygin gas (MCG) model as the unification of dark matter and dark energy from the latest observational data: the Union2 dataset of type supernovae Ia (SNIa), the observational Hubble data (OHD), the cluster X-ray gas mass fraction, the baryon acoustic oscillation (BAO), and the cosmic microwave background (CMB) data. In a flat universe, the constraint results for MCG model are, $Ω_{b}h^{2}=0.02263^{+0.00184}_{-0.00162}$ ($1σ$) $^{+0.00213}_{-0.00195}$ $(2σ)$, $B_{s}=0.7788^{+0.0736}_{-0.0723}$ ($1σ$) $^{+0.0918}_{-0.0904}$ $(2σ)$, $α=0.1079^{+0.3397}_{-0.2539}$ ($1σ$) $^{+0.4678}_{-0.2911}$ $(2σ)$, $B=0.00189^{+0.00583}_{-0.00756}$ ($1σ$) $^{+0.00660}_{-0.00915}$ $(2σ)$, and $H_{0}=70.711^{+4.188}_{-3.142}$ ($1σ$) $^{+5.281}_{-4.149}$ $(2σ)$.

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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