Statistics
Scientific paper
May 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011iaus..280p.260m&link_type=abstract
The Molecular Universe, Posters from the proceedings of the 280th Symposium of the International Astronomical Union held in Tole
Statistics
Scientific paper
Recently, there have been complimentary observations from multiple facilities to try to unravel the chemical complexity of comets. Incorporating results from various techniques, including: single-dish millimeter wavelength observations, interferometers, and/or IR spectroscopy, one can gain further insight into the abundances, production rates, distributions, and formation mechanisms of molecules in these objects. Such studies have provided great detail towards molecules with a-typical chemistries, such as H_2CO. We report spectral observations of C/2006 M4 (SWAN), C/2007 N3 (Lulin), and C/2009 R1 (McNaught) with the Arizona Radio Observatory's SMT and 12-m telescopes, as well as the NRAO Greenbank telescope and IRTF-CSHELL. Multiple parent volatiles (HCN, CH_3OH, CO, CH_4, C2H6, and H_2O) plus two photo-dissociation products (CS and OH) have been detected in these objects. We will present a comparison of molecular abundances in these comets to those observed in others, supporting a long-term effort of building a comet taxonomy based on composition. Previous work has revealed a range of abundances of parent species (from "organics-poor" to "organics-rich") with respect to water among comets, however the statistics are still poorly constrained and interpretations of the observed compositional diversity are uncertain.
Bonev Boncho P. .
Charnley Steven B.
Chuang Y. L.
DiSanti Michael A.
Kuan Yi-Jehng
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