Simulations of the cosmic infrared and submillimeter background for future large surveys: I. Presentation and first application to Herschel/SPIRE and Planck/HFI

Abstract

The coming Planck and Herschel missions will survey the sky at unprecedented angular scales and sensitivities. Simulations are needed for better interpretating the results of the surveys and for testing new methods of, e.g., source extraction and component separation. We present new simulations of the infrared and submillimeter cosmic background, including the correlation between infrared galaxies. The simulations were used to quantify the source-detection thresholds for Herschel/SPIRE and Planck/HFI, as well as to study the detectability of the cosmic infrared background correlated fluctuations. The simulations are based on an empirical model of IR galaxy evolution. For the correlations, we only included the linear clustering, assuming that infrared galaxies are biased tracers of the dark-matter fluctuation density field. We used the simulations with different bias parameters to predict the confusion noise for Herschel/SPIRE and Planck/HFI and the completeness levels. We also discuss the detectability of the linear clustering in Planck/HFI power spectra, including the foreground and backgrounds components. Simulated maps and catalogs are publicly available online at http://www.ias.u-psud.fr/irgalaxies/simulations.php

A&A, 2008, in press

References in corpus (5)

• The Cosmic Infrared Background Resolved by Spitzer. Contributions of Mid-Infrared Galaxies to the Far-Infrared Background
• Correlated Anisotropies in the Cosmic Far-Infrared Background Detected by MIPS/Spitzer: Constraint on the Bias
• Comparison of filters for the detection of point sources in Planck simulations
• A highly obscured and strongly clustered galaxy population discovered with the Spitzer Space Telescope
• Power Spectrum Analysis of Far-IR Background Fluctuations in 160 Micron Maps From the Multiband Imaging Photometer for Spitzer

Cited by in corpus (6)

• Spitzer Deep and Wide Legacy Mid- and Far-Infrared Number Counts and Lower Limits of Cosmic Infrared Background
• Submillimeter Number Counts at 250, 350 and 500 microns in BLAST data
• Observational evidence that positive and negative AGN feedback depends on galaxy mass and jet power
• Impact of Point Source Clustering on Cosmological Parameters with CMB Anisotropies
• Sources of confusion noise in the infrared wavelength range
• Extracting cosmological signals from foregrounds in deep mm maps of the sky