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Improving the identification of high-z Herschel sources with position priors and optical/NIR and FIR/mm photometric redshifts

P. G. Perez-Gonzalez ; E. Egami ; M. Rex ; T. D. Rawle ; J. P. Kneib ; J. Richard ; Daniel Johansson (Institutionen för radio- och rymdvetenskap, Radioastronomi och astrofysik) ; B. Altieri ; A. W. Blain ; J. J. Bock ; F. Boone ; C. R. Bridge ; S. M. Chung ; B. Clement ; D. Clowe ; F. Combes ; J. G. Cuby ; M. Dessauges-Zavadsky ; C. D. Dowell ; N. Espino-Briones ; D. Fadda ; A. K. Fiedler ; A. Gonzalez ; Cathy Horellou (Institutionen för radio- och rymdvetenskap, Radioastronomi och astrofysik) ; O. Ilbert ; R. J. Ivison ; M. Jauzac ; D. Lutz ; R. Pello ; M. J. Pereira ; G. H. Rieke ; G. Rodighiero ; D. Schaerer ; G. P. Smith ; I. Valtchanov ; G. L. Walth ; P. van der Werf ; M. W. Werner ; M. Zemcov
Astronomy & Astrophysics (0004-6361). Vol. 518 (2010), Article Number: L15,
[Artikel, refereegranskad vetenskaplig]

We present preliminary results about the detection of high redshift (U)LIRGs in the Bullet cluster field by the PACS and SPIRE instruments within the Herschel Lensing Survey (HLS) Program. We describe in detail a photometric procedure designed to recover robust fluxes and deblend faint Herschel sources near the confusion noise. The method is based on the use of the positions of Spitzer/MIPS 24 mu m sources as priors. Our catalogs are able to reliably (5 sigma) recover galaxies with fluxes above 6 and 10 mJy in the PACS 100 and 160 mu m channels, respectively, and 12 to 18 mJy in the SPIRE bands. We also obtain spectral energy distributions covering the optical through the far-infrared/millimeter spectral ranges of all the Herschel detected sources, and analyze them to obtain independent estimations of the photometric redshift based on either stellar population or dust emission models. We exemplify the potential of the combined use of Spitzer position priors plus independent optical and IR photometric redshifts to robustly assign optical/NIR counterparts to the sources detected by Herschel and other (sub-)mm instruments.

Nyckelord: infrared: galaxies, submillimeter: galaxies, galaxies: evolution, galaxies: high-redshift, gravitational lensing: strong, galaxies:, photometry, infrared luminosity functions, spectral energy-distributions, bullet, cluster 1e0657-56, active galactic nuclei, star-formation history, deep-field-south, submillimeter galaxies, spitzer observations, forming, galaxies, multiwavelength

Denna post skapades 2010-12-02. Senast ändrad 2014-09-02.
CPL Pubid: 129972


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Institutioner (Chalmers)

Institutionen för radio- och rymdvetenskap, Radioastronomi och astrofysik (2005-2010)


Astronomi, astrofysik och kosmologi

Chalmers infrastruktur

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