Other
Scientific paper
Dec 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aas...20112802s&link_type=abstract
American Astronomical Society, 201st AAS Meeting, #128.02; Bulletin of the American Astronomical Society, Vol. 34, p.1312
Other
Scientific paper
We present results from sub-mm observations of sources selected from the ISO FIRBACK (Far IR BACKground) survey, along with UKIRT near-IR imaging of a sub-sample. This gives valuable insight to the brightest 10% of galaxies which contribute to the Cosmic Infrared Background (CIB). We estimate the photometric redshifts and luminosities of these sources by fitting their Spectral Energy Distributions (SEDs). The data appear to show a bimodal galaxy distribution, with normal star-forming galaxies at z ~ 0, and the z ~ 0.4-0.9 tail of a much more luminous population. These are similar to the ultraluminous infrared galaxies which are found to evolve rapidly with redshift in other surveys. We are biased away from much higher redshift objects by the detectability threshold of FIRBACK. Nevertheless, the handful of z ~ 0.5 sources which we identify are likely to be the low-z counterparts of the typically higher-z sources found in blank field sub-mm observations. The sources we identify here have the virtue of being relatively easy to study in the optical. Hence their detailed investigation could help elucidate the nature of the sub-mm bright galaxies.
Borys Colin
Chapman Sandra
Dole Herve
Halpern Mark
Lagache Guilaine
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