ISOPHOT Far-Infrared Survey of Nearby Molecular Clouds

Abstract

We present results of a far-infrared molecular cloud mapping program which utilizes the PHT-P photometer and PHT-C cameras of the ISOPHOT instrument. ISO has enabled us to study the emission of very cold dust, T_d < 15 K. The multi-wavelength observations between 3.6-200 µm allow to discern emission of different grain components, and to construct spectral energy distributions for embedded young stellar objects at far-IR wavelengths where their emission is at maximum. The extension up to 200 µm and the multi-filter coverage of the 60-200 µm wavelength range are essential improvements for study of physical properties of young stellar objects.