NOAO >   Observing Info >   Approved Programs >   2014B-0067

Small NOAO Logo

Proposal Information for 2014B-0067


PI: Miwa Goto, University Observatory Munich, mgoto@usm.lmu.de
Address: Scheinerstr. 1, Munich, Bavaria D-81679, Germany

CoI: Tom Geballe, Gemini Observatory

Title: Searching for H_3^+ isotopomers in the infrared

Abstract: We propose to use Phoenix to detect H_2D^+ in the infrared. In dense clouds the triatomic hydrogen molecular ion is highly fractionated with deuterium, because of the exothermic ion-neutral reaction of H_3^+ with deuterated molecular hydrogen HD. In the deuteration ladder of H_3^+ \rightarrow H_2D^+ \rightarrow D_2H^+ \rightarrow D_3^+, both ends, H_3^+ and D_3^+, are symmetric top molecules, only observable in the infrared. H_2D^+ has been detected at sub-mm wavelengths via its rotational transitions. The infrared absorption spectra of H_2D^+ and D_2H^+ will permit a straightforward quantitative comparison of the column density with H_3^+.


National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360



NOAO >   Observing Info >   Approved Programs >   2014B-0067

noaoprop-help@noao.edu

Small NOAO Logo