Publication Abstract

Probing the Chemical Complexity of High Mass Star Forming Regions

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

Recent 1 mm CARMA observations of Orion-KL have shown that the known chemical differentiation in the region is much more complex than previously thought. The maps from Friedel & Snyder (2008) show that both the nitrogen-rich hot core and oxygen-rich compact ridge regions are comprised of many smaller components, which is not a surprising result. However, the maps of acetone [(CH3)2CO] show that it is not co-spatial with other large oxygen-bearing species. Instead, acetone is only present in the smaller, partially-resolved regions where both large nitrogen-bearing species [e.g. ethyl cyanide, C2H5CN] and large oxygen-bearing species [e.g. dimethyl ether, (CH3)2O] overlap. This unexpected result cannot be explained by any of the current chemical models. In order to shed more light on this we have conducted additional high-resolution CARMA 3 mm observations of numerous complex molecules toward Orion-KL. We will present the results of these observations. We will also discuss the implications of these results in terms of the likely mechanisms for complex molecule formation.

Presented at the 63rd International Symposium on Molecular Spectroscopy, June 2008

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