论文标题

用层析成像弱透镜光圈质量统计探测暗能量

Probing dark energy with tomographic weak-lensing aperture mass statistics

论文作者

Martinet, Nicolas, Harnois-Déraps, Joachim, Jullo, Eric, Schneider, Peter

论文摘要

我们预测并优化了各种弱透明光圈质量($ M _ {\ rm ap} $)的宇宙学能力,以未来的宇宙剪切调查,包括峰,空隙和像素的完整分布(1d $ m _ {\ rm ap} $)。这些替代方法探究了物质分布的非高斯制度,从而向经典的两点估计器添加了互补的宇宙学信息。基于Slics和Cosmo-Slics $ n $ body模拟,我们构建了类似欧几里得的模拟,以探索$ s_8-ω_ {\ rm m} -W_0 $参数空间。我们开发了一种新的层析形式主义,该形式论利用了标准方法中探索的各个切片(auto-$ m _ {\ rm ap} $)之外的红移切片(cross- $ m _ {\ rm ap} $)之间的交叉信息。我们的自动 - $ m _ {\ rm ap} $预测精度与最近有关弱透明峰值统计的文献非常吻合,并且在包括交叉$ m _ {\ rm ap} $时将$ \ sim 50 $%提高。使用1D $ M _ {\ rm ap} $的使用进一步提高了它的表现,它胜过所有其他估计器,包括剪切两点相关函数($γ$ -2PCF)。在考虑所有断层扫描术语时,我们在结构增长参数$ s_8 $上的不确定性范围会增强$ \ sim 45 $%(几乎两倍(几乎两倍)(将1D $ M _ {\ rm ap ap} $和$γ$ -2PCF相比,与单独使用$ -2pcf相比。我们还测量了对状态$ W_0 $的暗能量方程的第一个组合预测,与仅$γ$ -2pcf相比,统计误差的三个倍数降低了。这表明,非高斯$ m _ {\ rm ap} $ map统计信息所探索的互补宇宙学信息不仅提供了提高对最近$σ_8$ - $ω_ {\ rm m} $张力的约束的潜力,而且还构成了我们的广播扩张的途径。

We forecast and optimize the cosmological power of various weak-lensing aperture mass ($M_{\rm ap}$) map statistics for future cosmic shear surveys, including peaks, voids, and the full distribution of pixels (1D $M_{\rm ap}$). These alternative methods probe the non-Gaussian regime of the matter distribution, adding complementary cosmological information to the classical two-point estimators. Based on the SLICS and cosmo-SLICS $N$-body simulations, we build Euclid-like mocks to explore the $S_8 - Ω_{\rm m} - w_0$ parameter space. We develop a new tomographic formalism which exploits the cross-information between redshift slices (cross-$M_{\rm ap}$) in addition to the information from individual slices (auto-$M_{\rm ap}$) probed in the standard approach. Our auto-$M_{\rm ap}$ forecast precision is in good agreement with the recent literature on weak-lensing peak statistics, and is improved by $\sim 50$% when including cross-$M_{\rm ap}$. It is further boosted by the use of 1D $M_{\rm ap}$ that outperforms all other estimators, including the shear two-point correlation function ($γ$-2PCF). When considering all tomographic terms, our uncertainty range on the structure growth parameter $S_8$ is enhanced by $\sim 45$% (almost twice better) when combining 1D $M_{\rm ap}$ and the $γ$-2PCF compared to the $γ$-2PCF alone. We additionally measure the first combined forecasts on the dark energy equation of state $w_0$, finding a factor of three reduction of the statistical error compared to the $γ$-2PCF alone. This demonstrates that the complementary cosmological information explored by non-Gaussian $M_{\rm ap}$ map statistics not only offers the potential to improve the constraints on the recent $σ_8$ - $Ω_{\rm m}$ tension, but also constitutes an avenue to understand the accelerated expansion of our Universe.

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