Unveiling Far-Infrared Counterparts of Bright Submillimeter Galaxies Using PACS Imaging

H. Dannerbauer 1, * E. Daddi 1 G. E. Morrison 2 B. Altieri 3 P. Andreani 4, 5 H. Aussel 1 S. Berta 6 A. Bongiovanni 7 A. Cava 7 J. Cepa 7 Alessandro Cimatti 8 H. Dominguez 9 D. Elbaz 1 N. Forster Schreiber 6 R. Genzel 6 C. Gruppioni 9 B. Horeau 1 H. S. Hwang 1 E. Le Floc'H 1 J. Le Pennec 1 D. Lutz 6 G. Magdis 1 B. Magnelli 6 R. Maiolino 10 R. Nordon 6 A. M. Perez Garcia 7 A. Poglitsch 6 P. Popesso 6 F. Pozzi 8 L. Riguccini 1 G. Rodighiero 11 A. Saintonge 6 P. Santini 12 M. Sanchez-Portal 3 L. Shao 6 E. Sturm 6 L. Tacconi 6 I. Valtchanov 3
* Corresponding author
1 AIM (UMR_7158 / UMR_E_9005 / UM_112) - Astrophysique Interprétation Modélisation
2 Institute for Astronomy [Honolulu]
3 Herschel Science Centre
4 ESO - European Southern Observatory
5 OAT - INAF - Osservatorio Astronomico di Trieste
6 MPE - Max Planck Institute for Extraterrestrial Physics
7 IAC - Instituto de Astrofisica de Canarias
8 Dipartimento di Astronomia
9 IASF-Bo - Istituto di Astrofisica Spaziale e Fisica cosmica - Bologna
10 IASF-Roma - Istituto di Astrofisica Spaziale e Fisica cosmica - Roma
11 Dipartimento di Astronomia
12 OAR - INAF - Osservatorio Astronomico
Abstract : We present a search for Herschel-PACS counterparts of dust-obscured, high-redshift objects previously selected at submillimeter and millimeter wavelengths in the Great Observatories Origins Deep Survey North field. We detect 22 of 56 submillimeter galaxies (39%) with a SNR of >=3 at 100 micron down to 3.0 mJy, and/or at 160 micron down to 5.7 mJy. The fraction of SMGs seen at 160 micron is higher than that at 100 micron. About 50% of radio-identified SMGs are associated with PACS sources. We find a trend between the SCUBA/PACS flux ratio and redshift, suggesting that these flux ratios could be used as a coarse redshift indicator. PACS undetected submm/mm selected sources tend to lie at higher redshifts than the PACS detected ones. A total of 12 sources (21% of our SMG sample) remain unidentified and the fact that they are blank fields at Herschel-PACS and VLA 20 cm wavelength may imply higher redshifts for them than for the average SMG population (e.g., z>3-4). The Herschel-PACS imaging of these dust-obscured starbursts at high-redshifts suggests that their far-infrared spectral energy distributions have significantly different shapes than template libraries of local infrared galaxies.
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Journal articles
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https://hal-cea.archives-ouvertes.fr/cea-01001863
Contributor : Bruno Savelli <>
Submitted on : Thursday, June 5, 2014 - 10:29:10 AM
Last modification on : Tuesday, December 10, 2019 - 3:28:53 PM

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CEA | CNRS | UNIV-PARIS7 | INSU | USPC | IRFU-AIM | DSM-IRFU | CEA-DRF

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H. Dannerbauer, E. Daddi, G. E. Morrison, B. Altieri, P. Andreani, et al.. Unveiling Far-Infrared Counterparts of Bright Submillimeter Galaxies Using PACS Imaging. Astrophysical Journal Letters, 2010, 720 (2), pp.L144. ⟨10.1088/2041-8205/720/2/L144⟩. ⟨cea-01001863⟩

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