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Dust models confronted with observations

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We critically discuss the two major models for interstellar dust grains developed by Greenberg and Mathis and their co-workers. So far, knowledge about the dust has been obtained mainly from extinction and polarization measurements in the UV, visual and near IR. Analysis of dust emission at longer wavelengths generally requires an evaluation of the radiative transfer. Such a procedure is necessary to assess optical grain properties at long wavelengths and also to interpret the emission from the different kinds of IR objects. The 10 μm silicate resonance and the submm dust absorptivity are presented as two examples. We then briefly summarize the implications which follow from the existence of extremely small dust grains.

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Krügel, E. Dust models confronted with observations. Astrophys Space Sci 128, 5–16 (1986).

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  • Dust
  • Silicate
  • Radiative Transfer
  • Longe Wavelength
  • Polarization Measurement