Cross-correlation of Planck CMB lensing with DESI galaxy groups

Abstract

We measure the cross-correlation between galaxy groups constructed from DESI Legacy Imaging Survey DR8 and \emph{Planck} CMB lensing, over overlapping sky area of 16876 $\mathrm{de}{\mathrm{g}}^2$. The detections are significant and consistent with the expected signal of the large-scale structure of the universe, over group samples of various redshift, mass, richness $N_{\mathrm{g}}$ and over various scale cuts. The overall S/N is 40 for a conservative sample with $N_{\mathrm{g}}\ge 5$, and increases to $50$ for the sample with $N_{\mathrm{g}}\ge 2$. Adopting the \emph{Planck} 2018 cosmology, we constrain the density bias of groups with $N_{\mathrm{g}}\ge 5$ as $b_{\mathrm{g}}=1.31\pm 0.10$, $2.22\pm 0.10$, $3.52\pm 0.20$ at $0.1<z\le 0.33$, $0.33<z\le 0.67$, $0.67<z\le 1$ respectively. The group catalog provides the estimation of group halo mass and therefore allows us to detect the dependence of bias on group mass with high significance. It also allows us to compare the measured bias with the theoretically predicted one using the estimated group mass. We find excellent agreement for the two high redshift bins. However, it is lower than the theory by $\sim 3\sigma$ for the lowest redshift bin. Another interesting finding is the significant impact of the thermal Sunyaev Zel'dovich (tSZ). It contaminates the galaxy group-CMB lensing cross-correlation at $\sim 30\%$ level, and must be deprojected first in CMB lensing reconstruction.

13 pages, 19 figures; Accepted by MNRAS

References in corpus (14)

• Why your model parameter confidences might be too optimistic -- unbiased estimation of the inverse covariance matrix
• An Extended Halo-based Group/Cluster finder: application to the DESI legacy imaging surveys DR8
• Evidence of Lensing of the Cosmic Microwave Background by Dark Matter Halos
• A Measurement of Gravitational Lensing of the Cosmic Microwave Background by Galaxy Clusters Using Data from the South Pole Telescope
• Galaxy clustering in the DESI Legacy Survey and its imprint on the CMB
• The clustering of the SDSS-IV extended Baryon Oscillation Spectroscopic Survey DR16 luminous red galaxy and emission line galaxy samples: cosmic distance and structure growth measurements using multiple tracers in configuration space
• Strong detection of the CMB lensingxgalaxy weak lensingcross-correlation from ACT-DR4,PlanckLegacy and KiDS-1000
• Cross-Correlation of Planck CMB Lensing with DESI-Like LRGs
• Magnification bias in galaxy surveys with complex sample selection functions
• Cross-correlating radio continuum surveys and CMB lensing: constraining redshift distributions, galaxy bias and cosmology
• Cross-correlation between Subaru Hyper Suprime-Cam Galaxy Weak Lensing and Planck Cosmic Microwave Background Lensing
• Detection of pairwise kSZ effect with DESI galaxy clusters and Planck
• The Atacama Cosmology Telescope: Weighing distant clusters with the most ancient light
• Constraining the Halo Mass of Damped Ly$\alpha$ Absorption Systems (DLAs) at $z=2-3.5$ using the Quasar-CMB Lensing Cross-correlation

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