dc.creator Edwards, Jessica L. en_US dc.creator Ziurys, Lucy M. en_US dc.creator Cox, Erin G. en_US dc.creator Woolf, Neville J. en_US dc.date.accessioned 2012-07-09T19:38:41Z dc.date.available 2012-07-09T19:38:41Z dc.date.issued 2012 en_US dc.identifier 2012-WH-09 en_US dc.identifier.uri http://hdl.handle.net/1811/52516 dc.description Author Institution: Department of Chemistry and Biochemistry, Department of Astronomy, Steward Observatory, The University of Arizona, Tucson, AZ 85721 en_US dc.description.abstract The molecular content of Planetary Nebulae (PNe) is not well characterized. It is generally thought that as the PN evolves, the ultraviolet radiation from the central star destroys molecular material from the AGB (asymptotic giant branch) shell. Here we present new observations of two interesting nebulae, the Dumbbell (NGC6853) and the Red Spider (NGC6537), carried out with the Sub-Millimeter telescope and the 12-Meter telescope of the Arizona Radio Observatory. The J=1-0 transition of HCO$^{+}$ at 89 GHz has been mapped across the face of the Dumbbell Nebula, which is estimated to be about 10,000 years old. HCO$^{+}$ appears to be extended by several arcminutes across the Dumbbell, as traced by optical atomic emission, with an abundance relative to H$_2$ of \emph{f $\sim$} 10$^{-7}$. The molecule traces interesting velocity structure apparent in CO as well. In the Red Spider Nebula (age $\sim$ 1,000 years) CS and HCO$^{+}$ have been detected with abundances on the order of \emph{f $\sim$} 10$^{-6}$ for both. Searches for other molecules are currently being conducted. Most current results will be presented. en_US dc.language.iso en en_US dc.publisher Ohio State University en_US dc.title THE MOLECULAR CONTENT OF PLANETARY NEBULAE: THE DUMBBELL AND THE RED SPIDER en_US dc.type Article en_US
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