Weak-Lensing Mass Calibration of the Atacama Cosmology Telescope Equatorial Sunyaev-Zeldovich Cluster Sample with the Canada-France-Hawaii Telescope Stripe 82 Survey

• Published in: arXiv.org 2016-07
• Main Authors: Battaglia, N, Leauthaud, A, Miyatake, H, Hasselfield, M, Gralla, M B, Allison, R, Bond, J R, Calabrese, E, Crichton, D, Devlin, M J, Dunkley, J, Dünner, R, Erben, T, Ferrara, S, Halpern, M, Hilton, M, Hill, J C, Hincks, A D, Hložek, R, Huffenberger, K M, Hughes, J P, Kneib, J P, Kosowsky, A, Makler, M, Marriage, T A, Menanteau, F, Miller, L, Moodley, K, Moraes, B, Niemack, M D, Page, L, Shan, H, Sehgal, N, Sherwin, B D, Sievers, J L, Sifón, C, Spergel, D N, Staggs, S T, Taylor, J, Thornton, R, L van Waerbeke, Wollack, E J
• Format: Article
• Language: English
• Subjects: Calibration; Cosmology; Galactic clusters; Galaxies; Sunyaev-Zeldovich effect; Telescopes
• ISSN: 2331-8422
• DOI: 10.48550/arxiv.1509.08930

Mass calibration uncertainty is the largest systematic effect for using clusters of galaxies to constrain cosmological parameters. We present weak lensing mass measurements from the Canada-France-Hawaii Telescope Stripe 82 Survey for galaxy clusters selected through their high signal-to-noise thermal Sunyaev-Zeldovich (tSZ) signal measured with the Atacama Cosmology Telescope (ACT). For a sample of 9 ACT clusters with a tSZ signal-to-noise greater than five the average weak lensing mass is \(\left(4.8\pm0.8\right)\,\times10^{14}\,\mathrm{M}_\odot\), consistent with the tSZ mass estimate of \(\left(4.70\pm1.0\right)\,\times10^{14}\,\mathrm{M}_\odot\) which assumes a universal pressure profile for the cluster gas. Our results are consistent with previous weak-lensing measurements of tSZ-detected clusters from the Planck satellite. When comparing our results, we estimate the Eddington bias correction for the sample intersection of Planck and weak-lensing clusters which was previously excluded.