CaltechAUTHORS
Published September 25, 2002 | Version public
Journal Article Metadata-only

Evolution of interstellar dust properties from diffuse medium to a dense cloud

Creators

  • 1. ROR icon Institut d'Astrophysique Spatiale
  • 2. ROR icon Infrared Processing and Analysis Center

Abstract

The balloon borne experiment PRONAOS has measured the sub-millimetre emission from the diffuse interstellar medium to a quiescent filament in the Taurus molecular cloud. We model the output emission of this filament using a radiative transfer code and an independent tracer of the total column density (near infrared extinction). We show that inside the filament the transiently heated particles responsible of the 60 μm emission are removed and the dust sub-millimetre emissivity is increased by a significant factor, 3.4^(+0.3)_(-0.7) (for typically n_H > 3 ± 1 × 10^3 cm^(-3), A_V > 2.1 ± 0.5). This induces a deficit in the IRAS I_(60) μm/I_(100 μm) flux ratio in comparison with the diffuse interstellar medium and a decrease of the grain equilibrium temperature in excess to that predicted by extinction.

Additional Information

© 2002 EAS, EDP Sciences. Published online 25 September 2002.

Additional details

Identifiers

Eprint ID
84724
Resolver ID
CaltechAUTHORS:20180207-132705731

Dates

Created
2018-02-08
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Updated
2021-11-15
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