Photometric Redshift Using the Far-infrared Spectral Energy Distribution

Details Photometric Redshift Using the Far-infrared Spectral Energy Distribution Photometric Redshift Using the Far-infrared Spectral Energy Distribution

May 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003apj...588..736w&link_type=abstract

The Astrophysical Journal, Volume 588, Issue 2, pp. 736-745.

Astronomy and Astrophysics

Astronomy

20

Galaxies: Distances And Redshifts, Galaxies: High-Redshift, Galaxies: Photometry, Submillimeter, Techniques: Photometric

Scientific paper

A method for using the submillimeter band to determine photometric redshifts of luminous, high-z, dusty galaxies is presented. It is based on the observation that local ultraluminous infrared galaxies (ULIRGs) show an average spectral energy distribution (SED) that has a remarkably small dispersion for wavelengths λ>50 μm. The shape of the long-wavelength part is independent of whether the local ULIRG possesses an active galactic nucleus or not. A local template is derived from a sample of ULIRG data presented by Klaas et al. in 2001. Using this template and the internal dispersion in its shape, it is shown that observations at two fixed submillimeter wavelengths, e.g., 450 and 850 μm, can be used to determine the photometric redshift of galaxies in the redshift range 1

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