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Tracing the Bipolar Outflow from Orion Source I

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arxiv 0909.2906 v1 pith:4ZGPL3S4 submitted 2009-09-16 astro-ph.GA

Tracing the Bipolar Outflow from Orion Source I

classification astro-ph.GA
keywords outflowalongaxisbipolarhighorion-klsourcevelocity
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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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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