Secco, LF;
Jarvis, M;
Jain, B;
Chang, C;
Gatti, M;
Frieman, J;
Adhikari, S;
... Weller, J; + view all
(2022)
Dark Energy Survey Year 3 Results: Three-point shear correlations and mass aperture moments.
Physical Review D: Particles, Fields, Gravitation and Cosmology
, 105
(10)
, Article 103537. 10.1103/PhysRevD.105.103537.
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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 15.0σ. 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, parityviolating contributions and PSF modeling uncertainties are negligible, and determine that the measured signals are likely to be of astrophysical and gravitational origin.
| Type: | Article |
|---|---|
| Title: | Dark Energy Survey Year 3 Results: Three-point shear correlations and mass aperture moments |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevD.105.103537 |
| Publisher version: | http://doi.org/10.1103/PhysRevD.105.103537 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Science & Technology, Physical Sciences, Astronomy & Astrophysics, Physics, Particles & Fields, Physics, HIGHER-ORDER STATISTICS, WEAK-LENSING SURVEYS, COSMIC SHEAR, COSMOLOGICAL CONSTRAINTS, MODEL PREDICTIONS, CFHTLENS, CALIBRATION, PROSPECTS |
| UCL classification: | UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy UCL > Provost and Vice Provost Offices > UCL BEAMS UCL |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10150555 |
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