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Observations of CII, CI and CO in Interface Regions

Published online by Cambridge University Press:  07 August 2017

Jürgen Stutzki
Jürgen Stutzki*
Affiliation:
I. Physikalisches Institut der Universität zu Köln, ZÜulpicher Staße 77, D-5000 Köln 41, Germany

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UV-radiation longward of the Lyman edge (912 Å) can escape from HII-regions. It photodissociates carbon monoxide (λ < 1118 Å) and photoionizes neutral atomic carbon (λ < 1101 Å). The resulting CII/CI/CO transition zone on the edges of molecular clouds (photodissociation region or photodominated region: PDR) has been studied in great detail theoretically (Tielens & Hollenbach, 1985; van Dishoek & Black, 1988; Sternberg & Dalgarno, 1989) and these investigations have recently been extended to cover a wide range of densities and UV-intensities (Burton, Hollenbach & Tielens, 1990; Hollenbach, Takahashi & Tielens, 1991; see also A. Sternberg, this volume).

Type
Chemistry of Interface Regions
Information
Symposium - International Astronomical Union , Volume 150: Astrochemistry of Cosmic Phenomena , 1992 , pp. 303 - 308
Copyright
Copyright © Kluwer 1992 

References

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