Journal
ASTRONOMY & ASTROPHYSICS
Volume 594, Issue -, Pages -Publisher
EDP SCIENCES S A
DOI: 10.1051/0004-6361/201527418
Keywords
galaxies: clusters: general; infrared: galaxies; large-scale structure of Universe; methods: data analysis
Categories
Funding
- ESA
- CNES (France)
- CNRS/INSU-IN2P3-INP (France)
- ASI (Italy)
- CNR (Italy)
- INAF (Italy)
- NASA (USA)
- DoE (USA)
- STFC (UK)
- UKSA (UK)
- CSIC (Spain)
- MINECO (Spain)
- JA (Spain)
- RES (Spain)
- Tekes (Finland)
- AoF (Finland)
- CSC (Finland)
- DLR (Germany)
- MPG (Germany)
- CSA (Canada)
- DTU Space (Denmark)
- SER/SSO (Switzerland)
- RCN (Norway)
- SFI (Ireland)
- FCT/MCTES (Portugal)
- ERC
- PRACE (EU)
- French Agence Nationale de la Recherche [ANR-11-BD56-015]
- Science and Technology Facilities Council [ST/L000768/1, ST/K004131/1, ST/K002821/1, ST/F01239X/1] Funding Source: researchfish
- UK Space Agency [ST/N001206/1, ST/N001095/1] Funding Source: researchfish
- Direct For Mathematical & Physical Scien
- Division Of Physics [1125897] Funding Source: National Science Foundation
- STFC [ST/F01239X/1] Funding Source: UKRI
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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 c(500) = 1.00(-0.15)(+0.18). 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) 6 sigma; (ii) 3 sigma; and (iii) 4 sigma. 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 A(tSZ-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.
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