Cross-correlation between the cosmic microwave and infrared backgrounds for integrated Sachs-Wolfe detection

Abstract

We investigate the cross-correlation between the cosmic infrared background (CIB) and cosmic microwave background (CMB) anisotropies due to the integrated Sachs-Wolfe (ISW) effect. We first describe the CIB anisotropies using a linearly biased power spectrum, valid on the angular scales of interest. From this, we derive the theoretical angular power spectrum of the CMB-CIB cross-correlation for different instruments and frequencies. Our cross-spectra show similarities in shape with usual CMB/galaxies cross-correlations. We discuss the detectability of the ISW signal by performing a signal-to-noise (SNR) analysis with our predicted spectra. Our results show that : (i) in the ideal case of noiseless, full-sky maps, the significances obtained range from 6 to 7 sigmas depending on the frequency, with a maximum at 353 GHz (ii) in realistic cases which account for the presence of noise including astrophysical contaminents, the results depend strongly on the major contribution to the noise term. They span from 2 to 5 sigmas, the most favorable frequency for detection being 545 GHz. We also find that the joint use of all available frequencies in the cross-correlation does not improve significantly the total SNR, due to the high level of correlation of the CIB maps at different frequencies.

10 pages, 6 figures, 1 table ; small changes to match the version published in MNRAS

References in corpus (10)

• The Cosmic Infrared Background Resolved by Spitzer. Contributions of Mid-Infrared Galaxies to the Far-Infrared Background
• Combined analysis of the integrated Sachs-Wolfe effect and cosmological implications
• Planck Early Results XVIII: The power spectrum of cosmic infrared background anisotropies
• Integrated Sachs-Wolfe effect from the cross correlation of WMAP3 year and the NRAO VLA sky survey data: New results and constraints on dark energy
• Planck early results. VI. The High Frequency Instrument data processing
• Constraining dark energy with cross-correlated CMB and Large Scale Structure data
• Statistical properties of dust far-infrared emission
• Cross-correlation of 2MASS and WMAP3: Implications for the Integrated Sachs-Wolfe effect
• A Map of the Integrated Sachs-Wolfe Signal from Luminous Red Galaxies
• Optimising large galaxy surveys for ISW detection

Cited by in corpus (8)

• Modelling the correlation between the thermal Sunyaev Zel'dovich effect and the cosmic infrared background
• The Integrated Sachs-Wolfe Signal from BOSS Super-Structures
• Constraining cosmology with the cosmic microwave and infrared backgrounds correlation
• Measuring ISW with next-generation radio surveys
• Accelerated expansion of the universe and chasing photons from the CMB to study the late time integrated Sachs-Wolfe effect over different redshift ranges
• On the ISW-cluster cross-correlation in future surveys
• Cross-correlation analysis of CMB with foregrounds for residuals
• Cosmic Microwave and Infrared Backgrounds cross-correlation for ISW detection