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Título : Dissociative Shocks in the Neighborhood of Orion IRc2 Traced with Atomic Carbon
Autor : Pardo Carrión, Juan Ramón ; Cernicharo, José ; Phillips, Thomas G.
Palabras clave : ISM: individual (Orion IRc2)
ISM: molecules
Line: profiles
Radio lines: ISM
Fecha de publicación : 20-nov-2005
Editor: American Astronomical Society
University of Chicago Press
Citación : The Astrophysical Journal, 634:L61–L64 (2005)
Resumen: We 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.
URI : http://hdl.handle.net/10261/2643
DOI: 10.1086/498710
ISSN: 1538-4357
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