Omori, Y;
Giannantonio, T;
Porredon, A;
Baxter, EJ;
Chang, C;
Crocce, M;
Fosalba, P;
... Zahn, O; + view all
(2019)
Dark Energy Survey Year 1 Results: Tomographic cross-correlations between Dark Energy Survey galaxies and CMB lensing from South Pole Telescope + Planck.
Physical Review D
, 100
(4)
, Article 043501. 10.1103/PhysRevD.100.043501.
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Abstract
We measure the cross-correlation between redMaGiC galaxies selected from the Dark Energy Survey (DES) year 1 data and gravitational lensing of the cosmic microwave background (CMB) reconstructed from South Pole Telescope (SPT) and Planck data over 1289 deg 2 . When combining measurements across multiple galaxy redshift bins spanning the redshift range of 0.15 < z < 0.90 , we reject the hypothesis of no correlation at 19.9 σ significance. When removing small-scale data points where thermal Sunyaev-Zel’dovich signal and nonlinear galaxy bias could potentially bias our results, the detection significance is reduced to 9.9 σ . We perform a joint analysis of galaxy-CMB lensing cross-correlations and galaxy clustering to constrain cosmology, finding Ω m = 0.27 6 + 0.029 − 0.030 and S 8 = σ 8 √ Ω m / 0.3 = 0.80 0 + 0.090 − 0.094 . We also perform two alternate analyses aimed at constraining only the growth rate of cosmic structure as a function of redshift, finding consistency with predictions from the concordance Λ CDM model. The measurements presented here are part of a joint cosmological analysis that combines galaxy clustering, galaxy lensing and CMB lensing using data from DES, SPT and Planck.
| Type: | Article |
|---|---|
| Title: | Dark Energy Survey Year 1 Results: Tomographic cross-correlations between Dark Energy Survey galaxies and CMB lensing from South Pole Telescope + Planck |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevD.100.043501 |
| Publisher version: | https://doi.org/10.1103/PhysRevD.100.043501 |
| 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: | Cosmic microwave background, Cosmological parameters, 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/10080286 |
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