Other
Scientific paper
Apr 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010atnf.prop.3146c&link_type=abstract
ATNF proposal M454, Semester: April, 2010
Other
Late Stages Of Stellar Evolution (Excluding Pulsars And Supernovae), Interstellar Medium In And Around The Milky Way, Mopra
Scientific paper
IRAS 15194-5115 presents a unique opportunity to expand our knowledge of gas-phase astrochemistry. We propose to perform a deep, broad-band (8 Gz wide) spectroscopic search around 80 GHz in the the cool, carbon-rich envelope of the AGB star IRAS 15194-5115. We will search for the molecular anions C4H-, C6H-, C8H-, their parent-neutral hydrocarbons C4H, C6H and C8H, cyanopolyynes HC5N, HC7N, HC9N and other molecules of astrochemical interest. Hydrocarbon anions have recently been identified as astrophysically important species in a variety of environments but their chemistry is still poorly understood. The measurement of anion abundances in this source will provide new information on their reaction rates for use in astrochemical models. The detection and measurement of additional carbon-chain species, cyanopolyynes and other molecules will permit us to construct a detailed chemical model for this environment (analagous to that of IRC+10216), which will provide important new insights into the details of gas-phase organic astrochemistry.
Charnley Steven
Cordiner Martin
Millar Tom
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