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Dark Energy Survey Year 3 Results: Three-point shear correlations and mass aperture moments

Abstract : We present high signal-to-noise measurements of three-point shear correlations and the third moment of the mass aperture statistic using the first 3 years of data from the Dark Energy Survey. We additionally obtain the first measurements of the configuration and scale dependence of the four three-point shear correlations which carry cosmological information. With the third-order mass aperture statistic, we present tomographic measurements over angular scales of 4 to 60 arcminutes with a combined statistical significance of 15.0 σ . Using the tomographic information and measuring also the second-order mass aperture, we additionally obtain a skewness parameter and its redshift evolution. We find that the amplitudes and scale-dependence of these shear 3pt functions are in qualitative agreement with measurements in a mock galaxy catalog based on N-body simulations, indicating promise for including them in future cosmological analyses. We validate our measurements by showing that B-modes, parity-violating contributions and PSF modeling uncertainties are negligible, and determine that the measured signals are likely to be of astrophysical and gravitational origin.
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Contributor : Nathalie POTHIER Connect in order to contact the contributor
Submitted on : Tuesday, August 9, 2022 - 3:07:28 PM
Last modification on : Wednesday, August 10, 2022 - 3:46:34 AM
Long-term archiving on: : Thursday, November 10, 2022 - 6:37:39 PM


PhysRevD.105.103537 (1).pdf
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L. F. Secco, M. Jarvis, B. Jain, C. Chang, M. Gatti, et al.. Dark Energy Survey Year 3 Results: Three-point shear correlations and mass aperture moments. Physical Review D, 2022, 105, ⟨10.1103/PhysRevD.105.103537⟩. ⟨insu-03748267⟩



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