论文标题
IV阶段调查的增长和扩展历史的联合重建，其假设i：深色能源超过$λ$
Joint reconstructions of growth and expansion histories from stage-IV surveys with minimal assumptions I: Dark Energy beyond $Λ$
论文作者
论文摘要
结合了下一代（IV阶段）宇宙学调查中的超新星，重子声学振荡和红移空间畸变数据，我们的目标是使用$ f _ {\ Mathrm de}（Z）（Z）（Z）（Z）（Z）（Z）（Z）（Z）（Z）（Z）= ρ_\ mathrm {de}（z）/ρ_\ mathrm {de，0} $带有高斯进程（GP）。为了在很少或没有数据的高红移处重建宇宙学数量，我们采用了一种新方法来实施以下最小的假设：a）我们的宇宙学对应于平坦的Friedman-Lema- Roberton-Robertson-Walker（FLRRW）宇宙； b）在大型红移上获得了爱因斯坦·德·保姆（EDS）宇宙。这使我们能够从重建的背景扩展历史记录中重建增长历史。假设有各种模型，我们显示了我们的重建方法将它们与$ \gtrsim2σ$的$λ$ CDM区分开的能力。
Combining Supernovae, Baryon Acoustic Oscillations and Redshift-Space Distortions data from the next generation of (Stage-IV) cosmological surveys, we aim to reconstruct the expansion history up to large redshifts using forward-modeling of $f_{\mathrm DE}(z) = ρ_\mathrm{DE}(z)/ρ_\mathrm{DE,0}$ with Gaussian processes (GP). In order to reconstruct cosmological quantities at high redshifts where few or no data are available, we adopt a new approach to GP which enforces the following minimal assumptions: a) Our cosmology corresponds to a flat Friedman-Lemaître-Robertson-Walker (FLRW) universe; b) An Einstein de Sitter (EdS) universe is obtained on large redshifts. This allows us to reconstruct the perturbations growth history from the reconstructed background expansion history. Assuming various DE models, we show the ability of our reconstruction method to differentiate them from $Λ$CDM at $\gtrsim2σ$.
