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 map cutouts along the direction of the locally measured background CMB polarization gradient. Using data from the SPTpol 500 deg survey at the locations of roughly 18,000 clusters with richness from the Dark Energy Survey (DES) Year-3 full galaxy cluster catalog, we detect lensing at . The mean stacked mass of the selected sample is found to be 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.
Keywords
Cite
@article{arxiv.1907.08605,
title = {A Detection of CMB-Cluster Lensing using Polarization Data from SPTpol},
author = {S. Raghunathan and S. Patil and E. Baxter and B. A. Benson and L. E. Bleem and T. M. Crawford and G. P. Holder and T. McClintock and C. L. Reichardt and T. N. Varga and N. Whitehorn and P. A. R. Ade and S. Allam and A. J. Anderson and J. E. Austermann and S. Avila and J. S. Avva and D. Bacon and J. A. Beall and A. N. Bender and F. Bianchini and S. Bocquet and D. Brooks and D. L. Burke and J. E. Carlstrom and J. Carretero and F. J. Castander and C. L. Chang and H. C. Chiang and R. Citron and M. Costanzi and A. T. Crites and L. N. da Costa and S. Desai and H. T. Diehl and J. P. Dietrich and M. A. Dobbs and P. Doel and S. Everett and A. E. Evrard and C. Feng and B. Flaugher and P. Fosalba and J. Frieman and J. Gallicchio and J. García-Bellido and E. Gaztanaga and E. M. George and T. Giannantonio and A. Gilbert and R. A. Gruendl and J. Gschwend and N. Gupta and G. Gutierrez and T. de Haan and N. W. Halverson and N. Harrington and J. W. Henning and G. C. Hilton and D. L. Hollowood and W. L. Holzapfel and K. Honscheid and J. D. Hrubes and N. Huang and J. Hubmayr and K. D. Irwin and T. Jeltema and M. Carrasco Kind and L. Knox and N. Kuropatkin and O. Lahav and A. T. Lee and D. Li and M. Lima and A. Lowitz and M. A. G. Maia and J. L. Marshall and J. J. McMahon and P. Melchior and F. Menanteau and S. S. Meyer and R. Miquel and L. M. Mocanu and J. J. Mohr and J. Montgomery and C. Corbett Moran and A. Nadolski and T. Natoli and J. P. Nibarger and G. Noble and V. Novosad and R. L. C. Ogando and S. Padin and A. A. Plazas and C. Pryke and D. Rapetti and A. K. Romer and A. Roodman and A. Carnero Rosell and E. Rozo and J. E. Ruhl and E. S. Rykoff and B. R. Saliwanchik and E. Sanchez and J. T. Sayre and V. Scarpine and K. K. Schaffer and M. Schubnell and S. Serrano and I. Sevilla-Noarbe and C. Sievers and G. Smecher and M. Smith and M. Soares-Santos and A. A. Stark and K. T. Story and E. Suchyta and M. E. C. Swanson and G. Tarle and C. Tucker and K. Vanderlinde and T. Veach and J. De Vicente and J. D. Vieira and V. Vikram and G. Wang and W. L. K. Wu and V. Yefremenko and Y. Zhang},
journal= {arXiv preprint arXiv:1907.08605},
year = {2019}
}
Comments
10 pages, 3 figures, 1 table; typos fixed; accepted for publication in PRL