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Detection of CMB-cluster lensing using polarization data from SPTpol

Raghunathan, S., Patil, S., Baxter, E., Benson, B.A., Bleem, L.E., Crawford, T.M., Holder, G.P., McClintock, T., Reichardt, C.L., Varga, T.N., Whitehorn, N., Ade, P ORCID:, Allam, S., Anderson, A.J., Austermann, J.E., Avila, S., Avva, J.S., Bacon, D., Beall, J.A., Bender, A.N., Bianchini, F., Bocquet, S., Brooks, D., Burke, D.L., Carlstrom, J.E., Carretero, J., Castander, F.J., Chang, C.L., Chiang, H.C., Citron, R., Costanzi, M., Crites, A.T., da Costa, L.N., Desai, S., Diehl, H.T., Dietrich, J.P., Dobbs, M.A., Doel, P., Everett, S., Evrard, A.E., Feng, C., Flaugher, B., Fosalba, P., Frieman, J., Gallicchio, J., García-Bellido, J., Gaztanaga, E., George, E.M., Giannantonio, T., Gilbert, A., Gruendl, R.A., Gschwend, J., Gupta, N., Gutierrez, G., de Haan, T., Halverson, N.W., Harrington, N., Henning, J.W., Hilton, G.C., Hollowood, D.L., Holzapfel, W.L., Honscheid, K., Hrubes, J.D., Huang, N., Hubmayr, J., Irwin, K.D., Jeltema, T., Kind, M. Carrasco, Knox, L., Kuropatkin, N., Lahav, O., Lee, A.T., Li, D., Lima, M., Lowitz, A., Maia, M.A.G., Marshall, J.L., McMahon, J.J., Melchior, P., Menanteau, F., Meyer, S.S., Miquel, R., Mocanu, L.M., Mohr, J.?J., Montgomery, J., Moran, C. Corbett, Nadolski, A., Natoli, T., Nibarger, J.P., Noble, G., Novosad, V., Ogando, R.L.C., Padin, S., Plazas, A.A., Pryke, C., Rapetti, D., Romer, A.K., Roodman, A., Rosell, A. Carnero, Rozo, E., Ruhl, J.E., Rykoff, E.S., Saliwanchik, B.R., Sanchez, E., Sayre, J.T., Scarpine, V., Schaffer, K.K., Schubnell, M., Serrano, S., Sevilla-Noarbe, I., Sievers, C., Smecher, G., Smith, M., Soares-Santos, M., Stark, A.A., Story, K.T., Suchyta, E., Swanson, M.E.C., Tarle, G., Tucker, C ORCID:, Vanderlinde, K., Veach, T., De Vicente, J., Vieira, J.D., Vikram, V., Wang, G., Wu, W.L.K., Yefremenko, V. and Zhang, Y. 2019. Detection of CMB-cluster lensing using polarization data from SPTpol. Physical Review Letters 123 (18) , 181301. 10.1103/PhysRevLett.123.181301

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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 λ ≥ 10 from the Dark Energy Survey (DES) Year-3 full galaxy cluster catalog, we detect lensing at 4.8 σ . The mean stacked mass of the selected sample is found to be ( 1.43 ± 0.40 ) × 10 14 M ⊙ 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.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Publisher: American Physical Society
ISSN: 0031-9007
Date of First Compliant Deposit: 25 November 2019
Date of Acceptance: 31 October 2019
Last Modified: 04 May 2023 01:03

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