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Diffuse molecular clouds at high galactic latitude

Published online by Cambridge University Press:  03 August 2017

Ronald Stark
Ronald Stark*
Affiliation:
Sterewacht Leiden, P.O. Box 9513, NL-2300 RA Leiden, the Netherlands E-mail STARK@HLERUL51.BITNET

Abstract

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The IRAS 60 and 100 μm flux from cirrus clouds are commonly explained by dust continuum emission. But this explanation in some cases requires unexpectedly high dust temperatures.

We argue that the contribution of fine structure emission of neutral oxygen, O°(63 μm), can be significant in the IRAS 60 μm band. The 0°(63 μm) line emission together with the dust continuum emission offers a plausible explanation of the observed flux ratio I(60)/I(100), as well as of its variation across individual clouds. We also discuss the clumpy/filamentary structure of these clouds.

Type
Large Scale Structure
Information
Symposium - International Astronomical Union , Volume 147: Fragmentation of Molecular Clouds and Star Formation , 1991 , pp. 29 - 35
Copyright
Copyright © Kluwer 1991 

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