Using CARMA, we imaged the 87 GHz SiO v=0 J=2-1 line toward Orion-KL with 0.45 arcsec angular resolution. The maps indicate that radio source I drives a bipolar outflow into the surrounding molecular cloud along a NE--SW axis, in agreement with the model of Greenhill et al. (2004). The extended high velocity outflow from Orion-KL appears to be a continuation of this compact outflow. High velocity gas extends farthest along a NW--SE axis, suggesting that the outflow direction changes on time scales of a few hundred years.
@article{arxiv.0909.2906,
title = {Tracing the Bipolar Outflow from Orion Source I},
author = {R. L. Plambeck and M. C. H. Wright and D. N. Friedel and S. L. Widicus Weaver and A. D. Bolatto and M. W. Pound and D. P. Woody and J. W. Lamb and S. L. Scott},
journal= {arXiv preprint arXiv:0909.2906},
year = {2014}
}
Comments
4 pages, 4 figures; accepted for publication in Ap J Letters