Bibcode
Davis, R. J.; de Bernardis, P.; de Gasperis, G.; Cuttaia, F.; Danese, L.; Colombo, L. P. L.; Coulais, A.; Crill, B. P.; Christensen, P. R.; Clements, D. L.; Colafrancesco, S.; Colombi, S.; Chen, X.; Chiang, L.-Y.; Catalano, A.; Cayón, L.; Chamballu, A.; Chary, R.-R.; Cabella, P.; Cardoso, J.-F.; Borrill, J.; Bouchet, F. R.; Burigana, C.; Bonaldi, A.; Bond, J. R.; Benoît, A.; Bernard, J.-P.; Bersanelli, M.; Bethermin, M.; Bhatia, R.; Battaner, E.; Benabed, K.; Balbi, A.; Banday, A. J.; Barreiro, R. B.; Aumont, J.; Baccigalupi, C.; Arnaud, M.; Ashdown, M.; Atrio-Barandela, F.; Ade, P. A. R.; Aghanim, N.; Argüeso, F.; Planck Collaboration; González-Nuevo, J.; Giraud-Héraud, Y.; Giardino, G.; Giard, M.; Ganga, K.; Galeotta, S.; Franceschi, E.; Frailis, M.; Fosalba, P.; Forni, O.; Finelli, F.; Eriksen, H. K.; Jones, W. C.; Jagemann, T.; Jaffe, A. H.; Jaffe, T. R.; Holmes, W. A.; Hobson, M.; Hivon, E.; Hildebrandt, S. R.; Herranz, D.; Hernández-Monteagudo, C.; Henrot-Versillé, S.; Harrison, D.; Hansen, F. K.; Gruppuso, A.; Gregorio, A.; Górski, K. M.; Lähteenmäki, A.; Lagache, G.; Kurki-Suonio, H.; Kurinsky, N.; Kunz, M.; Knox, L.; Knoche, J.; Kneissl, R.; Kisner, T. S.; Keihänen, E.; Juvela, M.; Maris, M.; Mandolesi, N.; Maino, D.; Macías-Pérez, J. F.; López-Caniego, M.; Lilje, P. B.; Leonardi, R.; Lawrence, C. R.; Lasenby, A.; Lamarre, J.-M.; Matarrese, S.; Massardi, M.; Masi, S.; Martínez-González, E.; Marshall, D. J.; Naselsky, P.; Murphy, J. A. et al.
Bibliographical reference
Astronomy and Astrophysics, Volume 550, id.A133, 19 pp.
Advertised on:
2
2013
Journal
Citations
56
Refereed citations
54
Description
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 Release Compact Source Catalogue (ERCSC) at 100 to
857 GHz (3 mm to 350 μm). Three zones (deep, medium and shallow) of
approximately homogeneous coverage are used to permit a clean and
controlled correction for incompleteness, which was explicitly not done
for the ERCSC, as it was aimed at providing lists of sources to be
followed up. Our sample, prior to the 80% completeness cut, contains
between 217 sources at 100 GHz and 1058 sources at 857 GHz over about 12
800 to 16 550 deg2 (31 to 40% of the sky). After the 80%
completeness cut, between 122 and 452 and sources remain, with flux
densities above 0.3 and 1.9 Jy at 100 and 857 GHz. The sample so defined
can be used for statistical analysis. Using the multi-frequency coverage
of the Planck High Frequency Instrument, all the sources have been
classified as either dust-dominated (infrared galaxies) or
synchrotron-dominated (radio galaxies) 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 353 GHz; at 353 GHz or higher (or 217 GHz 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 857 GHz 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 (from earlier Planck
results, Herschel, BLAST, SCUBA, LABOCA, SPT, and ACT) and models taking
into account both radio or infrared galaxies, and covering a large range
of flux densities. We derive the multi-frequency Euclidean level - the
plateau in the normalised differential counts at high flux-density - 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 857 GHz.
Appendices are available in electronic form at http://www.aanda.orgCorresponding
author: herve.dole [at] ias.u-psud.fr (herve[dot]dole[at]ias[dot]u-psud[dot]fr)
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Rafael
Rebolo López