Spitzer imaging of the jet driving the NGC2264 G outflow

TY - JOUR

T1 - Spitzer imaging of the jet driving the NGC2264 G outflow

AU - Teixeira, P. S.

AU - McCoey, C.

AU - Fich, M.

AU - Lada, C. J.

PY - 2008/2/11

Y1 - 2008/2/11

N2 - We present new infrared imaging of the NGC2264 G 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.

AB - We present new infrared imaging of the NGC2264 G 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.

KW - ISM: individual

KW - NGC 2264 G

KW - ISM: jets and outflows

UR - https://ui.adsabs.harvard.edu/#abs/2008MNRAS.384...71T

U2 - 10.1111/j.1365-2966.2007.12698.x

DO - 10.1111/j.1365-2966.2007.12698.x

M3 - Article

SN - 0035-8711

VL - 384

SP - 71

EP - 76

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 1

ER -