Mid and Far Infrared Surveys with ISO
David Elbaz
Abstract
We present the results of the extragalactic surveys performed at 15 and 175 microns using the ISOCAM and ISOPHOT instruments on-board the Infrared Space Observatory (ISO). The number counts at both wavelengths present a strong evolution. The preliminary study of the individual galaxies responsible for this evolution suggest that more star formation was hidden by dust at redshifts around z=1-2 and imply that the population of luminous IR galaxies detected by IRAS in the local universe must have played a major role in the formation and evolution of galaxies and cannot be considered anymore as extreme and rare cases.
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