Observations of the Hubble Deep Field with the Infrared Space Observatory - III. Source counts and P(D) analysis
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Date
1997-01-01Author
Oliver, Sebastian James
Goldschmidt, Pippa
Franceschini, Alberto
Serjeant, Stephen B.G.
Efstathiou, Andreas
Verma, Aprajita
Gruppioni, Carlotta
Eaton, Nick
Robert Mann, Robert
Mobasher, Bahram
Pearson, Chris P.
Rowan-Robinson, Michael
Sumner, Timothy J.
Danese, Luigi
Elbaz, David
Egami, Eiichi
Kontizas, Maria
Andy R. Lawrence, Andy
McMahon, R. G.
Nørgaard-Nielsen, Hans Ulrik
Pérez-Fournón, Ismaël
González-Serrano, José Ignacio
Metadata
Show full item recordAbstract
We present source counts at 6.7 and 15 μm from our maps of the Hubble Deep Field (HDF) region, reaching 38.6 μJy at 6.7 μm and 255 μJy at 15 μm. These are the first ever extragalactic number counts to be presented at 6.7 μm, and are three decades fainter than IRAS at 12 μm. Both source counts and a P(D) analysis suggest that we have reached the Infrared Space Obsen'atory (ISO) confusion limit at 15 μm: this will have important implications for future space missions. These data provide an excellent reference point for other ongoing ISO surveys. A no-evolution model at 15 μm is ruled out at > 3σ, while two models which fit the steep IRAS 60-μm counts are acceptable. This provides important confirmation of the strong evolution seen in IRAS surveys. One of these models can then be ruled out from the 6.7-μm data.
URI
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=0001544575&origin=inwardhttps://repo.euc.ac.cy/handle/123456789/630
DOI
10.1093/mnras/289.2.471