Cross-correlation of Dark Energy Survey Year 3 lensing data with ACT and Planck thermal Sunyaev-Zel’dovich effect observations. I. Measurements, systematics tests, and feedback model constraints
Cross-correlation of Dark Energy Survey Year 3 lensing data with ACT and Planck thermal Sunyaev-Zel’dovich effect observations. I. Measurements, systematics tests, and feedback model constraints
复制标题
暗能量调查第 3 年透镜数据与 ACT 和普朗克热 Sunyaev-Zelâdovich 效应观测结果的互相关。
DOI：
10.1103/physrevd.105.123525
复制
发表时间：
2022
影响因子：
5
通讯作者：
Doux, C.
中科院分区：
文献类型：
--
作者：
Gatti, M.;Pandey, S.;Baxter, E.;Hill, J. C.;Moser, E.;Raveri, M.;Fang, X.;DeRose, J.;Giannini, G.;Doux, C.
我们提出了一个层析测量的热Sunyaev-Zel'dovich（TSZ）从普朗克和阿塔卡马宇宙学望远镜和弱星系透镜剪切测量在第一个三年的观测暗能量调查之间的互相关。这种关联在很宽的红移范围内对重子中的热能很敏感，因此是天体物理反馈的有力探测。我们检测到的相关性在统计学意义上是迄今为止最高的。我们研究了TSZ图中潜在的污染物，包括宇宙红外背景和射电源，发现宇宙红外背景对我们的测量有很大的影响，必须考虑到我们的分析。我们使用互相关测量来测试不同的反馈模型。特别是，我们使用几种不同的压力分布模型对流体动力学模拟校准的TSZ模型。我们的分析边缘化了红移的不确定性，剪切校准偏差，和内在的对齐效果。我们也忽略了普朗克DES先验。我们发现，数据更喜欢在小尺度的压力分布的低幅度的模型，兼容的情况下，具有强大的活动星系核反馈和喷射气体从内部的晕。当使用一个更灵活的模型的剪切剖面，约束较弱，数据不能区分不同的重子处方。
We present a tomographic measurement of the cross-correlation between thermal Sunyaev-Zel’dovich (TSZ) maps fromPlanckand the Atacama Cosmology Telescope and weak galaxy lensing shears measured during the first three years of observations of the Dark Energy Survey. This correlation is sensitive to the thermal energy in baryons over a wide redshift range and is therefore a powerful probe of astrophysical feedback. We detect the correlation at a statistical significance of, the highest significance to date. We examine the TSZ maps for potential contaminants, including cosmic infrared background and radio sources, finding that cosmic infrared background has a substantial impact on our measurements and must be taken into account in our analysis. We use the cross-correlation measurements to test different feedback models. In particular, we model the TSZ using several different pressure profile models calibrated against hydrodynamical simulations. Our analysis marginalizes over redshift uncertainties, shear calibration biases, and intrinsic alignment effects. We also marginalize overandusingPlanckor DES priors. We find that the data prefer the model with a low amplitude of the pressure profile at small scales, compatible with a scenario with strong active galactic nuclei feedback and ejection of gas from the inner part of the halos. When using a more flexible model for the shear profile, constraints are weaker, and the data cannot discriminate between different baryonic prescriptions.