16 μm Imaging around the Hubble Deep Field–North with theSpitzerIRS
| Autor: | James W. Colbert, R.-R. Chary, L. Armus, Vassilis Charmandaris, Dan Weedman, Harry Teplitz |
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| Přispěvatelé: | Spitzer Science Center, California Institute of Technology (SSC), Department of Astronomy, Cornell University, Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique (LERMA), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université de Cergy Pontoise (UCP), Université Paris-Seine-Université Paris-Seine-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2005 |
| Předmět: | |
| Zdroj: | The Astrophysical Journal The Astrophysical Journal, 2005, 634, pp.128-136. ⟨10.1086/496946⟩ |
| ISSN: | 1538-4357 0004-637X |
| DOI: | 10.1086/496946 |
| Popis: | International audience; We present a pilot study of 16 mum imaging within the GOODS northern field. Observations were obtained using the ``peak-up'' imaging capability of the Spitzer IRS. We survey 35 arcmin2 to an average 3 sigma depth of 0.075 mJy and detect 149 sources. The survey partially overlaps the area imaged at 15 mum by the ISO, and we demonstrate that our photometry and galaxy number counts are consistent with its measurements. We infer the total infrared luminosity of 16 mum detections using a comparison to local templates and find a wide range of LIR, from ~109 to 1012 Lsolar. Approximately 1/5 of the detected sources have counterparts in the Chandra 2 Ms catalog, and we show that the hard-band (2-8 keV) detected sources are likely to have strong active galactic nucleus (AGN) contributions to the X-ray flux. The ultradeep sensitivity of Chandra implies that some X-ray detections may be purely starbursting objects. We examine the 16 to 24 mum flux ratio and conclude that it shows evidence for the detection of redshifted polycyclic aromatic hydrocarbon (PAH) emission at z~0.5 and z>0.8. |
| Databáze: | OpenAIRE |
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