Ade, PAR;
Aghanim, N;
Arnaud, M;
Aumont, J;
Baccigalupi, C;
Banday, AJ;
Barreiro, RB;
... Zonca, A; + view all
(2016)
Planck 2015 results XXIII. The thermal Sunyaev-Zeldovich effect-cosmic infrared background correlation.
ASTRONOMY & ASTROPHYSICS
, 594
, Article A23. 10.1051/0004-6361/201527418.
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Abstract
We use Planck data to detect the cross-correlation between the thermal Sunyaev-Zeldovich (tSZ) effect and the infrared emission from the galaxies that make up the the cosmic infrared background (CIB). We first perform a stacking analysis towards Planck-confirmed galaxy clusters. We detect infrared emission produced by dusty galaxies inside these clusters and demonstrate that the infrared emission is about 50% more extended than the tSZ effect. Modelling the emission with a Navarro-Frenk-White profile, we find that the radial profile concentration parameter is c500 = 1.00+0.18-0.15 . This indicates that infrared galaxies in the outskirts of clusters have higher infrared flux than cluster-core galaxies. We also study the cross-correlation between tSZ and CIB anisotropies, following three alternative approaches based on power spectrum analyses: (i) using a catalogue of confirmed clusters detected in Planck data; (ii) using an all-sky tSZ map built from Planck frequency maps; and (iii) using cross-spectra between Planck frequency maps. With the three different methods, we detect the tSZ-CIB cross-power spectrum at significance levels of (i) 6σ; (ii) 3σ; and (iii) 4σ. We model the tSZ-CIB cross-correlation signature and compare predictions with the measurements. The amplitude of the cross-correlation relative to the fiducial model is AtSZ−CIB = 1.2 ± 0.3. This result is consistent with predictions for the tSZ-CIB cross-correlation assuming the best-fit cosmological model from Planck 2015 results along with the tSZ and CIB scaling relations.
| Type: | Article |
|---|---|
| Title: | Planck 2015 results XXIII. The thermal Sunyaev-Zeldovich effect-cosmic infrared background correlation |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1051/0004-6361/201527418 |
| Publisher version: | http://dx.doi.org/10.1051/0004-6361/201527418 |
| Additional information: | © ESO, 2016 |
| Keywords: | Science & Technology, Physical Sciences, Astronomy & Astrophysics, galaxies: clusters: general, infrared: galaxies, large-scale structure of Universe, methods: data analysis, SOUTH-POLE TELESCOPE, ANGULAR POWER SPECTRUM, DARK-MATTER HALOES, GALAXY CLUSTERS, STAR-FORMATION, COSMOLOGICAL PARAMETERS, SUBMILLIMETER GALAXIES, SZ, ANISOTROPIES, 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 Physics and Astronomy 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/1542999 |
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