publication . Article . 2019

Detection of CMB-Cluster Lensing using Polarization Data from SPTpol

Srinivasan Raghunathan; S. Patil; Eric J. Baxter; B. A. Benson; Lindsey Bleem; T. M. Crawford; Gilbert Holder; T. McClintock; Christian L. Reichardt; T. N. Varga; ...
Open Access
  • Published: 31 Oct 2019 Journal: Physical Review Letters, volume 123 (issn: 0031-9007, eissn: 1079-7114, Copyright policy)
  • Publisher: American Physical Society (APS)
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 QU 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 λ≥10 from the Dark Energy Survey (DES) Year-3 full galaxy cluster catalog, we detect lensing at 4.8σ. The mean stacked mass of the selected sample is found to...
Persistent Identifiers
Subjects
arXiv: Astrophysics::Cosmology and Extragalactic AstrophysicsAstrophysics::Instrumentation and Methods for Astrophysics
free text keywords: General Physics and Astronomy, Cosmology, Dark energy, Cosmic microwave background, Gravitational lens, Astrophysics, Polarization (waves), Physics, Cluster (physics), Galaxy cluster, Weak gravitational lensing
Funded by
ARC| Discovery Projects - Grant ID: DP150103208
Project
  • Funder: Australian Research Council (ARC) (ARC)
  • Project Code: DP150103208
  • Funding stream: Discovery Projects
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