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. A. R.; 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.; Vanderlinde, K.; Veach, T.; Vicente, J. De; Vieira, J. D.; Vikram, V.; Wang, G.; Wu, W. L. K.; Yefremenko, V.; Zhang, Y.

doi:10.1103/PhysRevLett.123.181301

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Detection of CMB-cluster lensing using polarization data from SPTpol

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Varga, T. N.
Optical and Interpretative Astronomy, MPI for Extraterrestrial Physics, Max Planck Society;

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Mohr, J. J.
Optical and Interpretative Astronomy, MPI for Extraterrestrial Physics, Max Planck Society;

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Citation

Raghunathan, S., Patil, S., Baxter, E., Benson, B. A., Bleem, L. E., Crawford, T. M., et al. (2019). Detection of CMB-cluster lensing using polarization data from SPTpol. Physical Review Letters, 123(18): 181301. doi:10.1103/PhysRevLett.123.181301.

Cite as: https://hdl.handle.net/21.11116/0000-0005-5D4D-E

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 deg² 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 be (1.43±0.40)×10¹⁴M_⊙ 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.