Physical conditions in photodissociation regions from observations of carbon radio recombination lines and IR fine-structure lines of CII and OI

Authors
Sorochenko, RL Tsivilev, AP
Citation
Rl. Sorochenko et Ap. Tsivilev, Physical conditions in photodissociation regions from observations of carbon radio recombination lines and IR fine-structure lines of CII and OI, ASTRON REP, 44(7), 2000, pp. 426-435
Citations number
37
Categorie Soggetti
Space Sciences
Journal title
ASTRONOMY REPORTS
ISSN journal
10637729 → ACNP
Volume
44
Issue
7
Year of publication
2000
Pages
426 - 435
Database
ISI
SICI code
1063-7729(200007)44:7<426:PCIPRF>2.0.ZU;2-E
Abstract
Observations of the C56 alpha line-the first carbon radio recombination lin e in the millimeter waveband-in the directions of the Orion Bar, NGC 2024, and W3 are reported. The results are analyzed together with data for the IR fine-structure lines of CII and OI, enabling unambiguous determination of the temperature and density in the photodissociation regions separating the HII regions and parent molecular clouds. (C) 2000 MAIK "Nauka/Interperiodi ca".