Publication Abstract

High Resolution λ=3mm Studies of Organic Molecules in Orion-KL

Friedel, D. N. and Widicus Weaver, S. L.

Orion-KL, one of the closest regions of massive star-formation, displays the most well-defined case of chemical differentiation in interstellar clouds. Here, the emission signatures for oxygen- and nitrogen-bearing organic molecules are spatially distinct. Using the Combined Array for Research in Millimeter-wave Astronomy (CARMA), we have conducted λ=3 mm imaging studies of Orion at beam sizes ranging from 5"-0.5". These observations are at higher spatial resolution than any previously reported, revealing the relative location of these molecules within the region to high precision, and indicating whether their emission is coincident with continuum sources, shocks, or other energy sources within the Orion-KL complex. These observations targeted transitions of ethyl cyanide [C2H5CN], dimethyl ether [(CH3)2O], methyl formate [HCOOCH3], formic acid [HCOOH], and acetone [(CH3)2CO]. We will present the results of these observations, and discuss the implications of these results on the formation and destruction mechanisms for large organic molecules in star-forming regions.

Presented at the 238th Meeting of the American Chemical Society, August 2009

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© 2015, D. N. Friedel