Detection of the significant impact of source clustering on higher-order statistics with DES Year 3 weak gravitational lensing data

Q1 Earth and Planetary Sciences

Monthly Notices of the Royal Astronomical Society: Letters Pub Date : 2023-10-04 DOI:10.1093/mnrasl/slad143

M Gatti, N Jeffrey, L Whiteway, V Ajani, T Kacprzak, D Zürcher, C Chang, B Jain, J Blazek, E Krause, A Alarcon, A Amon, K Bechtol, M Becker, G Bernstein, A Campos, R Chen, A Choi, C Davis, J Derose, H T Diehl, S Dodelson, C Doux, K Eckert, J Elvin-Poole, S Everett, A Ferte, D Gruen, R Gruendl, I Harrison, W G Hartley, K Herner, E M Huff, M Jarvis, N Kuropatkin, P F Leget, N MacCrann, J McCullough, J Myles, A Navarro-Alsina, S Pandey, J Prat, M Raveri, R P Rollins, A Roodman, C Sanchez, L F Secco, I Sevilla-Noarbe, E Sheldon, T Shin, M Troxel, I Tutusaus, T N Varga, B Yanny, B Yin, Y Zhang, J Zuntz, S S Allam, O Alves, M Aguena, D Bacon, E Bertin, D Brooks, D L Burke, A Carnero Rosell, J Carretero, R Cawthon, L N da Costa, T M Davis, J De Vicente, S Desai, P Doel, J García-Bellido, G Giannini, G Gutierrez, I Ferrero, J Frieman, S R Hinton, D L Hollowood, K Honscheid, D J James, K Kuehn, O Lahav, J L Marshall, J Mena-Fernández, R Miquel, R L C Ogando, A Palmese, M E S Pereira, A A Plazas Malagón, M Rodriguez-Monroy, S Samuroff, E Sanchez, M Schubnell, M Smith, F Sobreira, E Suchyta, M E C Swanson, G Tarle, N Weaverdyck

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引用次数: 0

Abstract

ABSTRACT We measure the impact of source galaxy clustering on higher order summary statistics of weak gravitational lensing data. By comparing simulated data with galaxies that either trace or do not trace the underlying density field, we show that this effect can exceed measurement uncertainties for common higher order statistics for certain analysis choices. We evaluate the impact on different weak lensing observables, finding that third moments and wavelet phase harmonics are more affected than peak count statistics. Using Dark Energy Survey (DES) Year 3 (Y3) data, we construct null tests for the source-clustering-free case, finding a p-value of p = 4 × 10−3 (2.6σ) using third-order map moments and p = 3 × 10−11 (6.5σ) using wavelet phase harmonics. The impact of source clustering on cosmological inference can be either included in the model or minimized through ad hoc procedures (e.g. scale cuts). We verify that the procedures adopted in existing DES Y3 cosmological analyses were sufficient to render this effect negligible. Failing to account for source clustering can significantly impact cosmological inference from higher order gravitational lensing statistics, e.g. higher order N-point functions, wavelet-moment observables, and deep learning or field-level summary statistics of weak lensing maps.

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利用DES Year 3弱引力透镜数据检测源聚类对高阶统计量的显著影响

我们测量了源星系群集对弱引力透镜数据高阶汇总统计量的影响。通过将模拟数据与跟踪或不跟踪潜在密度场的星系进行比较，我们表明，对于某些分析选择，这种影响可以超过普通高阶统计量的测量不确定性。我们评估了对不同弱透镜观测值的影响，发现三阶矩和小波相位谐波比峰值计数统计更受影响。利用暗能量调查(DES)第3年(Y3)数据，我们构造了无源聚类情况下的零检验，利用三阶映射矩和小波相位谐波分别得到p = 4 × 10−3 (2.6σ)和p = 3 × 10−11 (6.5σ)的p值。源聚类对宇宙学推断的影响既可以包含在模型中，也可以通过特别的程序(例如尺度削减)最小化。我们证实，在现有的DES Y3宇宙学分析中采用的程序足以使这种影响可以忽略不计。不考虑源聚类会严重影响高阶引力透镜统计的宇宙学推断，例如高阶n点函数、小波矩观测值、深度学习或弱透镜映射的场级汇总统计。

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来源期刊

Monthly Notices of the Royal Astronomical Society: Letters Earth and Planetary Sciences-Space and Planetary Science

CiteScore

8.80

自引率

0.00%

发文量

136

期刊介绍： For papers that merit urgent publication, MNRAS Letters, the online section of Monthly Notices of the Royal Astronomical Society, publishes short, topical and significant research in all fields of astronomy. Letters should be self-contained and describe the results of an original study whose rapid publication might be expected to have a significant influence on the subsequent development of research in the associated subject area. The 5-page limit must be respected. Authors are required to state their reasons for seeking publication in the form of a Letter when submitting their manuscript.