Omori, Y;
Baxter, EJ;
Chang, C;
Kirk, D;
Alarcon, A;
Bernstein, GM;
Bleem, LE;
... Zahn, O; + view all
(2019)
Dark Energy Survey Year 1 Results: Cross-correlation between Dark Energy Survey Y1 galaxy weak lensing and South Pole Telescope plus Planck CMB weak lensing.
Physical Review D
, 100
(4)
, Article 043517. 10.1103/PhysRevD.100.043517.
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Abstract
We cross-correlate galaxy weak lensing measurements from the Dark Energy Survey (DES) year-one data with a cosmic microwave background (CMB) weak lensing map derived from South Pole Telescope (SPT) and Planck data, with an effective overlapping area of 1289 deg 2 . With the combined measurements from four source galaxy redshift bins, we obtain a detection significance of 5.8 σ . We fit the amplitude of the correlation functions while fixing the cosmological parameters to a fiducial Λ CDM model, finding A = 0.99 ± 0.17 . We additionally use the correlation function measurements to constrain shear calibration bias, obtaining constraints that are consistent with previous DES analyses. Finally, when performing a cosmological analysis under the Λ CDM model, we obtain the marginalized constraints of Ω m = 0.26 1 + 0.070 − 0.051 and S 8 ≡ σ 8 √ Ω m / 0.3 = 0.66 0 + 0.085 − 0.100 . These measurements are used in a companion work that presents cosmological constraints from the joint analysis of two-point functions among galaxies, galaxy shears, and CMB lensing using DES, SPT, and Planck data.
| Type: | Article |
|---|---|
| Title: | Dark Energy Survey Year 1 Results: Cross-correlation between Dark Energy Survey Y1 galaxy weak lensing and South Pole Telescope plus Planck CMB weak lensing |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevD.100.043517 |
| Publisher version: | https://doi.org/10.1103/PhysRevD.100.043517 |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Cosmic microwave background, Large scale structure of the Universe |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS 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 |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10080893 |
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