THE MOLECULAR CORE AND THE POWERING SOURCE OF THE BIPOLAR MOLECULAR OUTFLOW IN NGC 2264G

DOI:
10.1086/174948
Publication date:
01/12/1994
Main author:
GOMEZ, JF
IAA authors:
GOMEZ, JF
Authors:
GOMEZ, JF; CURIEL, S; TORRELLES, JM; RODRIGUEZ, LF; ANGLADA, G; GIRART, JM
Journal:
ASTROPHYSICAL JOURNAL
Refereed:
Yes
Publication type:
Article
Volume:
436
Pages:
749-753
Number:
Abstract:
We present NH3(1, 1) and (2, 2), and radio continuum observations toward the bipolar molecular outflow NGC 22640. We detected a high-density NH3 core of 0.08 x 0.06 pc in size, M similar or equal to 6[X(NH3)/10(-8)](-1) M., and T-K similar or equal to 15 K, located almost midway between the blueshifted and redshifted CO lobes of the outflow. Neither the infrared sources detected so far (with the exception of IRAS 06384+0958) nor VLA I, the radio continuum source previously detected in the area (and suggested as the powering source of the outflow), appears to be associated with the high-density molecular clump. However, we detected a new radio continuum source, VLA 2, close to the maximum of NH3 emission. This continuum source shows a jetlike morphology, elongated in the direction of the bipolar molecular outflow. We propose that VLA 2 is a deeply embedded low-mass star and the most likely powering source of the bipolar outflow in NGC 22640. We find that the mechanical luminosity of the wind from VLA 2 is of the same order as the mechanical luminosity of the outflow, and as the estimated stellar luminosity of the source. Thus, this remarkable source appears to provide a very efficient outflow acceleration mechanism.
Database:
WOK