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Title:
Spitzer imaging of the jet driving the NGC2264G outflow
Authors:
Teixeira, P. S.; McCoey, C.; Fich, M.; Lada, C. J.
Affiliation:
AA(Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA; Departamento de Física da Faculdade de Ciências da Universidade de Lisboa, Ed. C8, Campo Grande, 1749-016 Lisboa, Portugal; Laboratório Associado Instituto D. Luiz - SIM, Universidade de Lisboa, Campo Grande, 1749-016 Lisboa, Portugal), AB(Department of Physics and Astronomy, University of Waterloo, Waterloo, ON N2L 3G1, Canada), AC(Department of Physics and Astronomy, University of Waterloo, Waterloo, ON N2L 3G1, Canada), AD(Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA)
Publication:
Monthly Notices of the Royal Astronomical Society, Volume 384, Issue 1, pp. 71-76. (MNRAS Homepage)
Publication Date:
02/2008
Origin:
MNRAS
MNRAS Keywords:
ISM: individual, NGC2264G, ISM: jets and outflows
DOI:
10.1111/j.1365-2966.2007.12698.x
Bibliographic Code:
2008MNRAS.384...71T

Abstract

We present new infrared imaging of the NGC2264G protostellar outflow region, obtained with the InfraRed Array Camera (IRAC) onboard the Spitzer Space Telescope. A jet in the red outflow lobe (eastern lobe) is clearly detected in all four IRAC bands and, for the first time, is shown to continuously extend over the entire length of the red outflow lobe traced by CO observations. The redshifted jet also extends to a deeply embedded Class0 source, Very Large Array (VLA)2, confirming previous suggestions that it is the driving source of the outflow (Gómez et al. 1994). The images show that the easternmost part of the redshifted jet exhibits what appear to be multiple changes of direction. To understand the redshifted jet morphology, we explore several mechanisms that could generate such apparent changes of direction. From this analysis, we conclude that the redshifted jet structure and morphology visible in the IRAC images can be largely, although not entirely, explained by a slowly precessing jet (period ~8000yr) that lies mostly on the plane of the sky. It appears that the observed changes in the redshifted jet direction may be sufficient to account for a significant fraction of the broadening of the outflow lobe observed in the CO emission.
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