Measurement of the mean central optical depth of galaxy clusters via the pairwise kinematic Sunyaev-Zel'dovich effect with SPT-3G and des

• Published in: Physical Review D
• Main Authors: Schiappucci, E., Bianchini, F., Aguena, M., Archipley, M., Balkenhol, L., Bleem, L. E., Chaubal, P., Crawford, T. M., Grandis, S., Omori, Y., Reichardt, C. L., Rozo, E., Rykoff, E. S., To, C., Abbott, T. M. C., Ade, P. A. R., Alves, O., Anderson, A. J., Andrade-Oliveira, F., Annis, J., Avva, J. S., Bacon, D., Benabed, K., Bender, A. N., Benson, B. A., Bernstein, G. M., Bertin, E., Bocquet, S., Bouchet, F. R., Brooks, D., Burke, D. L., Carlstrom, J. E., Carnero Rosell, A., Carrasco Kind, M., Carretero, J., Cecil, T. W., Chang, C. L., Chichura, P. M., Chou, T.-L., Costanzi, M., Cukierman, A., da Costa, L. N., Daley, C., de Haan, T., Desai, S., Dibert, K. R., Diehl, H. T., Dobbs, M. A., Doel, P., Doux, C., Dutcher, D., Everett, S., Everett, W., Feng, C., Ferguson, K. R., Ferrero, I., Ferté, A., Flaugher, B., Foster, A., Frieman, J., Galli, S., Gambrel, A. E., García-Bellido, J., Gardner, R. W., Gatti, M., Giannantonio, T., Goeckner-Wald, N., Gruen, D., Gualtieri, R., Guns, S., Gutierrez, G., Halverson, N. W., Hinton, S. R., Hivon, E., Holder, G. P., Hollowood, D. L., Holzapfel, W. L., Honscheid, K., Hood, J. C., Huang, N., James, D. J., Knox, L., Korman, M., Kuehn, K., Kuo, C.-L., Lahav, O., Lee, A. T., Lidman, C., Lima, M., Lowitz, A. E., Lu, C., March, M., Mena-Fernández, J., Menanteau, F., Millea, M., Miquel, R., Mohr, J. J., Montgomery, J., Muir, J., Natoli, T., Noble, G. I., Novosad, V., Ogando, R. L. C., Padin, S., Pan, Z., Paz-Chinchón, F., Pereira, M. E. S., Pieres, A., Plazas Malagón, A. A., Prabhu, K., Prat, J., Quan, W., Rahlin, A., Raveri, M., Rodriguez-Monroy, M., Romer, A. K., Rouble, M., Ruhl, J. E., Sanchez, E., Scarpine, V., Schubnell, M., Smecher, G., Smith, M., Soares-Santos, M., Sobrin, J. A., Suchyta, E., Suzuki, A., Tarle, G., Thomas, D., Thompson, K. L., Thorne, B., Tucker, C., Umilta, C., Vieira, J. D., Vincenzi, M., Wang, G., Weaverdyck, N., Weller, J., Whitehorn, N., Wu, W. L. K., Yefremenko, V., Young, M. R.
• Format: Article in Journal/Newspaper
• Language: English
• Published: 2023
• Subjects: South Pole; South pole
• Online Access: https://researchers.mq.edu.au/en/publications/92343d6e-f636-4fc4-a799-b7f17f385c82; https://doi.org/10.1103/PhysRevD.107.042004; http://www.scopus.com/inward/record.url?scp=85150193159&partnerID=8YFLogxK; http://purl.org/au-research/grants/arc/DP200101068

We infer the mean optical depth of a sample of optically selected galaxy clusters from the Dark Energy Survey via the pairwise kinematic Sunyaev-Zel'dovich (KSZ) effect. The pairwise KSZ signal between pairs of clusters drawn from the Dark Energy Survey Year-3 cluster catalog is detected at 4.1σ in cosmic microwave background temperature maps from two years of observations with the SPT-3G camera on the South Pole Telescope. After cuts, there are 24,580 clusters in the ∼1,400 deg 2 of the southern sky observed by both experiments. We infer the mean optical depth of the cluster sample with two techniques. The optical depth inferred from the pairwise KSZ signal is τ¯e=(2.97±0.73)×10 -3 , while that inferred from the thermal SZ signal is τ¯e=(2.51±0.55 stat ±0.15 syst )×10 -3 . The two measures agree at 0.6σ. We perform a suite of systematic checks to test the robustness of the analysis.