arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2008.04369astro-ph.CO
收藏

Subaru超Suprime-Cam星系弱透镜与Planck宇宙微波背景透镜的互相关

Cross-correlation between Subaru Hyper Suprime-Cam Galaxy Weak Lensing and Planck Cosmic Microwave Background Lensing

Gabriela A. Marques, Jia Liu, Kevin M. Huffenberger, J. Colin Hill

摘要:

星系弱透镜(WL)和宇宙微波背景(CMB)透镜之间的互相关是探测中等红移处物质涨落和探测任一探测中剩余系统的有力工具。在本文中,我们研究了星系WL从超Suprime-Cam斯巴鲁战略计划(HSC)的第一个数据发布和CMB透镜从最终的普朗克数据发布,在0.3< z < 1.5的HSC源星系的互相关。HSC是最深的第三阶段星系WL调查,并提供了一个很好的机会来研究高红移宇宙和新的挑战,其异常高的源密度,如源混合。在3.1 $σ$的显著性水平下测量互相关信号。我们的最佳拟合模型相对于最佳拟合2018普朗克宇宙学的振幅是$A = 0.81\pm 0.25$,与$A=1$一致。我们的结果也与以前的CMB透镜和星系WL交叉相关研究使用不同的调查是一致的。我们进行测试相对于WL $B$模式,点扩散函数,光度红移误差,和热Sunyaev-Zel'dovich泄漏,并没有发现显着的证据残留的系统。

英文摘要:

Cross-correlations between galaxy weak lensing (WL) and Cosmic Microwave Background (CMB) lensing are a powerful tool to probe matter fluctuations at intermediate redshifts and to detect residual systematics in either probe. In this paper, we study the cross-correlation of galaxy WL from the Hyper Suprime-Cam Subaru Strategic Program (HSC) first data release and CMB lensing from the final Planck data release, for HSC source galaxies at 0.3< z < 1.5. HSC is the deepest Stage-III galaxy WL survey, and provides both a great opportunity to study the high-redshift universe and new challenges related to its exceptionally high source density, such as source blending. The cross-correlation signal is measured at a significance level of 3.1$σ$. The amplitude of our best-fit model with respect to the best-fit 2018 Planck cosmology is $A = 0.81\pm 0.25$, consistent with $A=1$. Our result is also consistent with previous CMB lensing and galaxy WL cross-correlation studies using different surveys. We perform tests with respect to the WL $B$-modes, the point-spread-function, photometric redshift errors, and thermal Sunyaev-Zel'dovich leakage, and find no significant evidence of residual systematics.

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。

↑