Abstract

By using a detailed radiative transfer model, we show that the observed far-infrared spectrum of the Bok globule Barnard 335 can be explained by dust emission whose only energy source is the interstellar radiation field. The anomalous excess radiation observed around 60 μm in B335 and other globules can be accounted for by a «non-conventional» dust component, the very small grains already proposed for other celestial objects

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