Abstract
We have completed an analysis of the deepest far-infrared (90 (μm,175 μm) survey made using the ISOPHOT photometer aboard the Infrared Space Observatory (ISO). The cumulative number counts for two 44′ x 44′ regions in the Lockman Hole appear to be ~ 10 times higher than expected from a no-evolution model. Optical counterparts for the brightest 175 μm sources, ( S 175 > 150 mJy), have recently been identified using I-band and K-band imaging plus VLA-B 20cm continuum maps. Keck spectroscopy of a subsample of these sources shows that they are dusty emission line galaxies at redshifts z < 1.5, with infrared luminosities1 in the range L ir ~ 1010 – 1013 L ⊙. These ISOPHOT sources plausibly represent a link between the low-z luminous infrared galaxies (LIGs) detected by IRAS and the more distant submillimeter sources that have recently been detected in deep 850 μm surveys with SCUBA.
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Sanders, D.B. et al. (2001). Identification of ISOPHOT Deep Field Sources. In: Tacconi, L., Lutz, D. (eds) Starburst Galaxies: Near and Far. Springer Proceedings in Physics, vol 88. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-56538-0_42
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DOI: https://doi.org/10.1007/978-3-642-56538-0_42
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