Observations of extended CO(7→6) emission in Orion

Autor: G. J. Stacey, E. N. Grossman, W. F. Wall, Daniel T. Jaffe, J. E. Howe, J. G. Mangum
Rok vydání: 1992
Předmět:
Zdroj: AIP Conference Proceedings.
ISSN: 0094-243X
Popis: We mapped 807 GHz CO(7→6) emission in Orion along a strip extending from 0.7 pc west to 1.2 pc east of Ori θ1C, which lies in front of the Orion A molecular cloud. The similarity of the distribution of the CO(7→6) emission with 158 μm [C ii] line emission suggests that over the entire region mapped the narrow CO lines arise in warm photodissociation regions excited by the UV photons from Ori θ1C. The CO(7→6) lines east of θ1C split into two velocity components which persist over several arcminutes, indicating that at least one of the components arises from a dense, UV‐illuminated clump or filament within the molecular cloud and not at the cloud surface.
Databáze: OpenAIRE