Radio-mm-FIR photometric redshifts for (sub-)mm galaxies

Itziar Aretxaga, David H. Hughes, James S. Dunlop

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract / Description of output

We present a comparison between the published optical, IR, and CO spectroscopic redshifts of 86 (sub-)min galaxies and their photometric redshifts as derived from long-wavelength (radio-mm-FIR) photometric data. The redshift accuracy measured for 13 sub-mm galaxies with at least one robustly determined color in the radio-mm-FIR regime and additional constraining upper limits is Delta z approximate to 0.30. This accuracy degrades to Delta z approximate to 0.65 when only the 1.4 GHz/850 mu m spectral index is used, as derived from the analysis of a subsample of 58 galaxies with robustly determined redshifts. Despite the wide range of spectral energy distributions in the local galaxies that are used in an unbiased manner as templates, this analysis demonstrates that photometric redshifts can be efficiently derived for sub-mm galaxies with a precision of Delta z < 0.5 using only the rest-frame FIR to radio wavelength data, sufficient to guide the tuning of broad-band heterodyne observations (e.g., 100m GBT, 50m LMT, ALMA) or aid redshift determination in the case of a single line detection by these experiments.

Original languageEnglish
Title of host publicationFrom Z-Machines to Alma: (SUB) Millimeter Spectroscopy of Galaxies
EditorsAJ Baker, J Glenn, AI Harris, JG Mangum, MS Yun
Place of PublicationSAN FRANCISCO
Number of pages8
ISBN (Print)978-1-58381-311-9
Publication statusPublished - 2007
EventWorkshop on From Z-Machines to ALMA - (SUB) Millimeter Spectroscopy of Galaxies - Charlottesville
Duration: 12 Jan 200614 Jan 2006


ConferenceWorkshop on From Z-Machines to ALMA - (SUB) Millimeter Spectroscopy of Galaxies


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