Harnois-Deraps, J;
Troster, T;
Hojjati, A;
van Waerbeke, L;
Asgari, M;
Choi, A;
Erben, T;
... Moutard, T; + view all
(2016)
CFHTLenS and RCSLenS cross-correlation with Planck lensing detected in fourier and configuration space.
Monthly Notices of the Royal Astronomical Society
, 460
(1)
pp. 434-457.
10.1093/mnras/stw947.
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Abstract
We measure the cross-correlation signature between the Planck cosmic microwave background (CMB) lensing map and the weak lensing observations from both the Red-sequence Cluster Lensing Survey and the Canada–France–Hawaii Telescope Lensing Survey. In addition to a Fourier analysis, we include the first configuration-space detection, based on the estimators 〈κCMBκgal〉 and 〈κCMBγt〉. Combining 747.2 deg2 from both surveys, we find a detection significance that exceeds 4.2σ in both Fourier- and configuration-space analyses. Scaling the predictions by a free parameter A, we obtain APlanck CFHT = 0.68 ± 0.31 and APlanck RCS = 1.31 ± 0.33. In preparation for the next generation of measurements similar to these, we quantify the impact of different analysis choices on these results. First, since none of these estimators probes the exact same dynamical range, we improve our detection by combining them. Secondly, we carry out a detailed investigation on the effect of apodization, zero-padding and mask multiplication, validated on a suite of high-resolution simulations, and find that the latter produces the largest systematic bias in the cosmological interpretation. Finally, we show that residual contamination from intrinsic alignment and the effect of photometric redshift error are both largely degenerate with the characteristic signal from massive neutrinos, however the signature of baryon feedback might be easier to distinguish. The three lensing data sets are publicly available.
Type: | Article |
---|---|
Title: | CFHTLenS and RCSLenS cross-correlation with Planck lensing detected in fourier and configuration space |
Open access status: | An open access version is available from UCL Discovery |
DOI: | 10.1093/mnras/stw947 |
Publisher version: | http://dx.doi.org/10.1093/mnras/stw947 |
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, gravitational lensing: weak, dark matter, large-scale structure of Universe, GALAXY SHAPE MEASUREMENT, MATTER POWER SPECTRUM, COSMIC SHEAR, INTRINSIC ALIGNMENTS, COVARIANCE MATRICES, PRECISION COSMOLOGY, MASSIVE NEUTRINOS, DARK-MATTER, CMB, MODEL |
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 Space and Climate Physics |
URI: | https://discovery.ucl.ac.uk/id/eprint/10036527 |
1. | United States | 4 |
2. | Russian Federation | 2 |
3. | Indonesia | 1 |
4. | China | 1 |
5. | United Kingdom | 1 |
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