DGP膜模型的宇宙约束：几何和动力学观点
Cosmic Constraint to DGP Brane Model: Geometrical and Dynamical Perspectives
摘要：
本文从几何和动力学的角度对Dvali-Gabadadze-Porrati（DGP）膜模型进行了讨论。在几何方面，最近公布的Ia型超新星（SN Ia）的Union 2 $557$、斯隆数字巡天的重子声学振荡（BAO）和二度星系红移巡天的观测结果表明：（横向和径向的视线数据点），宇宙微波背景（CMB）的测量给出了七年威尔金森微波各向异性探测器观测（位移参数$R$、$l_a(z_\ast)$和最后散射面的红移值$z_\ast$）、高红移星系的年龄，即回望时间（LT）和高红移伽玛射线暴（GRB）。在动力学方面，数据点的增长函数（GF）的物质线性扰动。使用相同的数据集组合，我们还约束了平面$Λ$ CDM模型作为比较。结果表明，目前的观测资料和动力学资料都支持平坦的$Λ$ CDM模式，对于有（或无）SN系统误差的空间平坦的DGP模式，偏离度在$4σ$（$6σ$）以上。根据红移-距离关系的相对偏差检验了生长函数数据点的一致性。
英文摘要：
In this paper, the Dvali-Gabadadze-Porrati (DGP) brane model is confronted by current cosmic observational data sets from geometrical and dynamical perspectives. On the geometrical side, the recent released Union2 $557$ of type Ia supernovae (SN Ia), the baryon acoustic oscillation (BAO) from Sloan Digital Sky Survey and the Two Degree Galaxy Redshift Survey (transverse and radial to line-of-sight data points), the cosmic microwave background (CMB) measurement given by the seven-year Wilkinson Microwave Anisotropy Probe observations (shift parameters $R$, $l_a(z_\ast)$ and redshift at the last scatter surface $z_\ast$), ages of high redshifts galaxies, i.e. the lookback time (LT) and the high redshift Gamma Ray Bursts (GRBs) are used. On the dynamical side, data points about the growth function (GF) of matter linear perturbations are used. Using the same data sets combination, we also constrain the flat $Λ$CDM model as a comparison. The results show that current geometrical and dynamical observational data sets much favor flat $Λ$CDM model and the departure from it is above $4σ$($6σ$) for spatially flat DGP model with(without) SN systematic errors. The consistence of growth function data points is checked in terms of relative departure of redshift-distance relation.
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。
