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Title: A Detection of CMB-Cluster Lensing using Polarization Data from SPTpol

Abstract

We report the first detection of gravitational lensing due to galaxy clusters using only the polarization of the cosmic microwave background (CMB). The lensing signal is obtained using a new estimator that extracts the lensing dipole signature from stacked images formed by rotating the cluster-centered Stokes $Q/U$ map cutouts along the direction of the locally measured background CMB polarization gradient. Using data from the SPTpol 500 deg$$^{2}$$ survey at the locations of roughly 18,000 clusters with richness $$\lambda \ge 10$$ from the Dark Energy Survey (DES) Year-3 full galaxy cluster catalog, we detect lensing at $$4.8\sigma$$. The mean stacked mass of the selected sample is found to be $$(1.43 \pm 0.4)\ \times 10^{14}\ {\rm M_{\odot}}$$ which is in good agreement with optical weak lensing based estimates using DES data and CMB-lensing based estimates using SPTpol temperature data. This measurement is a key first step for cluster cosmology with future low-noise CMB surveys, like CMB-S4, for which CMB polarization will be the primary channel for cluster lensing measurements.

Authors:
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Contributing Org.:
SPT; DES
OSTI Identifier:
1568875
Report Number(s):
arXiv:1907.08605; FERMILAB-PUB-19-429-AE; DES-2018-0395
oai:inspirehep.net:1744661
DOE Contract Number:  
AC02-07CH11359
Resource Type:
Journal Article
Journal Name:
TBD
Additional Journal Information:
Journal Name: TBD
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS

Citation Formats

Raghunathan, S., and et al. A Detection of CMB-Cluster Lensing using Polarization Data from SPTpol. United States: N. p., 2019. Web.
Raghunathan, S., & et al. A Detection of CMB-Cluster Lensing using Polarization Data from SPTpol. United States.
Raghunathan, S., and et al. Fri . "A Detection of CMB-Cluster Lensing using Polarization Data from SPTpol". United States. https://www.osti.gov/servlets/purl/1568875.
@article{osti_1568875,
title = {A Detection of CMB-Cluster Lensing using Polarization Data from SPTpol},
author = {Raghunathan, S. and et al.},
abstractNote = {We report the first detection of gravitational lensing due to galaxy clusters using only the polarization of the cosmic microwave background (CMB). The lensing signal is obtained using a new estimator that extracts the lensing dipole signature from stacked images formed by rotating the cluster-centered Stokes $Q/U$ map cutouts along the direction of the locally measured background CMB polarization gradient. Using data from the SPTpol 500 deg$^{2}$ survey at the locations of roughly 18,000 clusters with richness $\lambda \ge 10$ from the Dark Energy Survey (DES) Year-3 full galaxy cluster catalog, we detect lensing at $4.8\sigma$. The mean stacked mass of the selected sample is found to be $(1.43 \pm 0.4)\ \times 10^{14}\ {\rm M_{\odot}}$ which is in good agreement with optical weak lensing based estimates using DES data and CMB-lensing based estimates using SPTpol temperature data. This measurement is a key first step for cluster cosmology with future low-noise CMB surveys, like CMB-S4, for which CMB polarization will be the primary channel for cluster lensing measurements.},
doi = {},
journal = {TBD},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {7}
}