2010MNRAS.409..109G

Query : 2010MNRAS.409..109G

2010MNRAS.409..109G - Mon. Not. R. Astron. Soc., 409, 109-121 (2010/November-3)

HerMES: deep galaxy number counts from a P(D) fluctuation analysis of SPIRE science demonstration phase observations.

GLENN J., CONLEY A., BETHERMIN M., ALTIERI B., AMBLARD A., ARUMUGAM V., AUSSEL H., BABBEDGE T., BLAIN A., BOCK J., BOSELLI A., BUAT V., CASTRO-RODRIGUEZ N., CAVA A., CHANIAL P., CLEMENTS D.L., CONVERSI L., COORAY A., DOWELL C.D., DWEK E., EALES S., ELBAZ D., ELLSWORTH-BOWERS T.P., FOX M., FRANCESCHINI A., GEAR W., GRIFFIN M., HALPERN M., HATZIMINAOGLOU E., IBAR E., ISAAK K., IVISON R.J., LAGACHE G., LAURENT G., LEVENSON L., LU N., MADDEN S., MAFFEI B., MAINETTI G., MARCHETTI L., MARSDEN G., NGUYEN H.T., O'HALLORAN B., OLIVER S.J., OMONT A., PAGE M.J., PANUZZO P., PAPAGEORGIOU A., PEARSON C.P., PEREZ-FOURNON I., POHLEN M., RIGOPOULOU D., RIZZO D., ROSEBOOM I.G., ROWAN-ROBINSON M., SANCHEZ PORTAL M., SCHULZ B., SCOTT D., SEYMOUR N., SHUPE D.L., SMITH A.J., STEVENS J.A., SYMEONIDIS M., TRICHAS M., TUGWELL K.E., VACCARI M., VALTCHANOV I., VIEIRA J.D., VIGROUX L., WANG L., WARD R., WRIGHT G., XU C.K. and ZEMCOV M.

Abstract (from CDS):

Dusty, star-forming galaxies contribute to a bright, currently unresolved cosmic far-infrared background. Deep Herschel-Spectral and Photometric Imaging Receiver (SPIRE) images designed to detect and characterize the galaxies that comprise this background are highly confused, such that the bulk lies below the classical confusion limit. We analyse three fields from the Herschel Multi-tiered Extragalactic Survey (HerMES) programme in all three SPIRE bands (250, 350 and 500 µm); parametrized galaxy number count models are derived to a depth of ∼2mJy/beam, approximately four times the depth of previous analyses at these wavelengths, using a probability of deflection [ P(D)] approach for comparison to theoretical number count models. Our fits account for 64, 60 and 43 per cent of the far-infrared background in the three bands. The number counts are consistent with those based on individually detected SPIRE sources, but generally inconsistent with most galaxy number count models, which generically overpredict the number of bright galaxies and are not as steep as the P(D)-derived number counts. Clear evidence is found for a break in the slope of the differential number counts at low flux densities. Systematic effects in the P(D) analysis are explored. We find that the effects of clustering have a small impact on the data, and the largest identified systematic error arises from uncertainties in the SPIRE beam.

Abstract Copyright: © 2010 The Authors. Journal compilation © 2010 RAS

Journal keyword(s): cosmology: observations - submillimetre: diffuse background - submillimetre: galaxies

Simbad objects: 3

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Number of rows : 3
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NAME Lockman Hole reg 10 45 00.0 +58 00 00           ~ 910 0
2 NAME GOODS-N Field reg 12 36 55.0 +62 14 15           ~ 1364 1
3 ACO 2218 ClG 16 35 54.0 +66 13 00           ~ 827 1

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