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Dissociative Shocks in the Neighborhood of Orion IRc2 Traced with Atomic Carbon

AutorPardo Carrión, Juan Ramón ; Cernicharo, José ; Phillips, Thomas G.
Palabras claveISM: individual (Orion IRc2)
ISM: molecules
Line: profiles
Radio lines: ISM
Submillimeter
Fecha de publicación20-nov-2005
EditorAmerican Astronomical Society
University of Chicago Press
CitaciónThe Astrophysical Journal, 634:L61–L64 (2005)
ResumenWe present Caltech Submillimeter Observatory 10" resolution maps of the 3P2-->3P1 line of neutral atomic carbon (809.3435 GHz) and the J=7–6 line of CO (806.6518 GHz) covering a region of 2'x4'.5 around Orion IRc2 in the BN/KL Nebula. The two lines were observed with the same receiver simultaneously, and therefore the two maps have zero relative pointing error. The atomic carbon (C I) emission does not peak toward the IRc2 position and displays a very different spatial distribution with respect to most molecular species. Moderately strong red wings are detected in C I around the region defined by the high-velocity CO gas with a spatial distribution that delineates a shell of ∼20" radius. We propose that CO dissociation in the J-type shocks produced by the interaction of the IRc2 outflows with the surrounding quiescent gas could play a significant role in this enhancement of atomic carbon in that shell.
URIhttp://hdl.handle.net/10261/2643
DOI10.1086/498710
ISSN1538-4357
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