Tracing the Bipolar Outflow from Orion Source I

Details Tracing the Bipolar Outflow from Orion Source I Tracing the Bipolar Outflow from Orion Source I

2009-09-16

arxiv.org/abs/0909.2906v1

Astronomy and Astrophysics

Astrophysics

Galaxy Astrophysics

4 pages, 4 figures; accepted for publication in Ap J Letters

Scientific paper

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.

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