Planck intermediate results. VII. Statistical properties of infrared and radio extragalactic sources from the Planck Early Release Compact Source Catalogue at frequencies between 100 and 857 GHz

Abstract

(abridged for arXiv) We make use of the Planck all-sky survey to derive number counts and spectral indices of extragalactic sources -- infrared and radio sources -- from the Planck Early Catalogue (ERCSC) at 100 to 857GHz. Our sample contains, after the 80% completeness cut, between 122 and 452 and sources, with flux densities above 0.3 and 1.9Jy at 100 and 857GHz, over about 31 to 40% of the sky. Using Planck HFI, all the sources have been classified as either dust-dominated or synchrotron-dominated on the basis of their spectral energy distributions (SED). Our sample is thus complete, flux-limited and color-selected to differentiate between the two populations. We find an approximately equal number of synchrotron and dusty sources between 217 and 353GHz; at 353GHz or higher (or 217GHz and lower) frequencies, the number is dominated by dusty (synchrotron) sources, as expected. For most of the sources, the spectral indices are also derived. We provide for the first time counts of bright sources from 353 to 857GHz and the contributions from dusty and synchrotron sources at all HFI frequencies in the key spectral range where these spectra are crossing. The observed counts are in the Euclidean regime. The number counts are compared to previously published data (earlier Planck, Herschel, BLAST, SCUBA, LABOCA, SPT, and ACT) and models taking into account both radio or infrared galaxies. We derive the multi-frequency Euclidean level and compare it to WMAP, Spitzer and IRAS results. The submillimetre number counts are not well reproduced by current evolution models of dusty galaxies, whereas the millimetre part appears reasonably well fitted by the most recent model for synchrotron-dominated sources. Finally we provide estimates of the local luminosity density of dusty galaxies, providing the first such measurements at 545 and 857GHz.

in press, A&A, 2013 -- matches published version (updated text for clarity after referee's report; conclusions unchanged) 20 pages (2 column), 14 figs (+3 in appendix), 9 tables

References in corpus (11)

• The Cosmic Infrared Background Resolved by Spitzer. Contributions of Mid-Infrared Galaxies to the Far-Infrared Background
• Astrophysical and Cosmological Information from Large-scale sub-mm Surveys of Extragalactic Sources
• Herschel-ATLAS Galaxy Counts and High Redshift Luminosity Functions: The Formation of Massive Early Type Galaxies
• The Wilkinson Microwave Anisotropy Probe (WMAP) Source Catalog
• A new model for infrared and submillimetre counts
• The Atacama Cosmology Telescope: Extragalactic Sources at 148 GHz in the 2008 Survey
• Submillimeter Number Counts at 250, 350 and 500 microns in BLAST data
• A combined re-analysis of existing blank-field SCUBA surveys: comparative 850-micron source lists, combined number counts, and evidence for strong clustering of the bright sub-mm galaxy population
• Blind and non-blind source detection in WMAP 5-year maps
• Statistical properties of extragalactic sources in the New Extragalactic WMAP Point Source (NEWPS) catalogue
• Submillimeter observations of the J2142-4423 Lya protocluster at z = 2.38

Cited by in corpus (25)

• Planck 2013 results. I. Overview of products and scientific results
• Planck 2013 results. XV. CMB power spectra and likelihood
• Planck 2013 results. XXIX. Planck catalogue of Sunyaev-Zeldovich sources
• Planck 2013 results. XVII. Gravitational lensing by large-scale structure
• Planck 2013 results. XXX. Cosmic infrared background measurements and implications for star formation
• Planck 2013 results. XXVIII. The Planck Catalogue of Compact Sources
• Planck 2015 results. XXII. A map of the thermal Sunyaev-Zeldovich effect
• Extragalactic millimeter-wave point source catalog, number counts and statistics from 771 square degrees of the SPT-SZ Survey
• Planck 2015 results. XXVI. The Second Planck Catalogue of Compact Sources
• Exploring Cosmic Origins with CORE: B-mode Component Separation
• The Atacama Cosmology Telescope: Dusty Star-Forming Galaxies and Active Galactic Nuclei in the Southern Survey
• High Radio Frequency Properties and Variability of Brightest Cluster Galaxies
• Measurement of CIB power spectra over large sky areas from Planck HFI maps
• The Atacama Cosmology Telescope: Two-season ACTPol Extragalactic Point Sources and their Polarization properties
• Planck intermediate results. XXVII. High-redshift infrared galaxy overdensity candidates and lensed sources discovered by Planck and confirmed by Herschel-SPIRE
• Impact of polarised extragalactic sources on the measurement of CMB B-mode anisotropies
• Non-Gaussianity of the Cosmic Infrared Background anisotropies I : Diagrammatic formalism and application to the angular bispectrum
• ALMA photometry of extragalactic radio sources
• Multifrequency study of GHz-peaked spectrum sources
• The Good, the Bad and the Ugly: Statistical quality assessment of SZ detections
• Forecasts on the contamination induced by unresolved point sources in primordial non-Gaussianity beyond Planck
• Average fractional polarization of extragalactic sources at Planck frequencies
• Estimating the confusion noise for the Millimetron space telescope
• Point Source Detection with Fully-Convolutional Networks: Performance in Realistic Simulations
• The bandmerged Planck Early Release Compact Source Catalogue: Probing sub-structure in the molecular gas at high Galactic latitude