The nature of the faint sub-mJy radio population
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The up-turn in Euclidean normalised source counts below 1mJy at 1.4GHz is well established in many deep radio surveys. There are strong reasons, observationally and theoretically, to believe that this up-turn is due to strong evolution of the starforming population up to z=2. However this hypothesis needs further confirmation spectroscopically and the examples in the literature are sparse. Theoretically the up-turn is well modelled by the evolution of the local radio starforming population and is consistent with the up-turn seen in recent mid-infrared source counts at 15um (ISOCAM) and 24um (Spitzer) and the tight correlation of the radio and MIR Luminosities of starforming galaxies.
2 Pages, including 2 PostScript figures. To appear in the proceedings of "The Dusty and Molecular Universe. A prelude to HERSCHEL and ALMA" 27 - 29 October 2004, Paris
2 Pages, including 2 PostScript figures. To appear in the proceedings of "The Dusty and Molecular Universe. A prelude to HERSCHEL and ALMA" 27 - 29 October 2004, Paris