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Title:TRACING THE ORIGINS OF NITROGEN BEARING ORGANICS TOWARD ORION KL WITH ALMA
Author(s):Carroll, Brandon
Contributor(s):Blake, Geoffrey; Bergin, Edwin; Wilkins, Olivia H.; Crockett, Nathan
Subject(s):Mini-symposium: ALMA's Molecular View
Abstract:A comprehensive analysis of a broadband 1.2 THz wide spectral survey of the Orion Kleinmann-Low nebula (Orion KL) has shown that nitrogen bearing complex organics trace systematically hotter gas than O-bearing organics toward this source. The origin of this O/N dichotomy remains a mystery. If complex molecules originate from grain surfaces, N-bearing species may be more difficult to remove from grain surfaces than O-bearing organics. Theoretical studies, however, have shown that hot (T=300 K) gas phase chemistry can produce high abundances of N-bearing organics while suppressing the formation of O-bearing complex molecules. In order to distinguish these distinct formation pathways we have obtained extremely high angular resolution observations of methyl cyanide (CH$_3$CN) using the Atacama Large Millimeter/Submillimeter Array (ALMA) toward Orion KL. By simultaneously imaging $^{13}$CH$_3$CN and CH$_2$DCN we map the temperature structure and D/H ratio of CH$_3$CN. We will present updated results of these observations and discuss their implications for the formation of N-bearing organics in the interstellar medium.
Issue Date:6/19/2017
Publisher:International Symposium on Molecular Spectroscopy
Citation Info:APS
Genre:CONFERENCE PAPER/PRESENTATION
Type:Text
Language:English
URI:http://hdl.handle.net/2142/97036
DOI:10.15278/isms.2017.MF11
Date Available in IDEALS:2017-07-27


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