Observations of the Hubble Deep Field with the Infrared Space Observatory - III. Source counts and P(D) analysis | Zendy

S. J. Oliver | Zendy; P. Goldschmidt | Zendy; A. Franceschini | Zendy; S. Serjeant | Zendy; A. Efstathiou | Zendy; A. Verma | Zendy; C. Gruppioni | Zendy; Nicholas R. Eaton | Zendy; Robert G. Mann | Zendy; Bahram Mobasher | Zendy; C. P. Pearson | Zendy; M. RowanRobinson | Zendy; T. J. Sumner | Zendy; L. Danese | Zendy; D. Elbaz | Zendy; E. Egami | Zendy; M. Kontizas | Zendy; A. Lawrence | Zendy; R. G. McMahon | Zendy; H. U. Nørgaard-Nielsen | Zendy; I. Pérez-Fournón | Zendy; J. I. GonzálezSerrano | Zendy

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Observations of the Hubble Deep Field with the Infrared Space Observatory - III. Source counts and P(D) analysis

Author(s) -

S. J. Oliver,

P. Goldschmidt,

A. Franceschini,

S. Serjeant,

A. Efstathiou,

A. Verma,

C. Gruppioni,

Nicholas R. Eaton,

Robert G. Mann,

Bahram Mobasher,

C. P. Pearson,

M. RowanRobinson,

T. J. Sumner,

L. Danese,

D. Elbaz,

E. Egami,

M. Kontizas,

A. Lawrence,

R. G. McMahon,

H. U. Nørgaard-Nielsen,

I. Pérez-Fournón,

J. I. GonzálezSerrano

Publication year - 1997

Publication title -

monthly notices of the royal astronomical society

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.058

H-Index - 383

eISSN - 1365-8711

pISSN - 0035-8711

DOI - 10.1093/mnras/289.2.471

Subject(s) - physics , observatory , astrophysics , confusion , hubble deep field , space observatory , point source , astronomy , infrared , source counts , hubble's law , field (mathematics) , hubble space telescope , cosmology , stars , galaxy , optics , psychology , mathematics , redshift , pure mathematics , psychoanalysis , dark energy

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. © 1997 RAS

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