Statistics – Computation
Scientific paper
Oct 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010dps....42.2840b&link_type=abstract
American Astronomical Society, DPS meeting #42, #28.40
Statistics
Computation
Scientific paper
On Nov. 4, 2010, the DIXI mission will fly by comet 103P/Hartley 2 using all three of the spacecraft's instruments (two telescopes with digital imagers and an infrared spectrometer). We describe a systematic study of relevant cometary molecules in comet Hartley 2 prior to and during the DIXI encounter. We have employed a suite of computational tools to analyze previous observations of comet Hartley 2 in order to gain insights into the intrinsic properties of its nucleus and the important physical and chemical processes that occur in its coma. The computational tools have been developed over the past decades and successfully applied to comets; including ComChem, a global, gas dynamics simulation with chemistry of the cometary coma and ComFluo, a time-dependent fluorescence model with collisions and superposition of non-equilibrium states appropriate for molecules of interest in comets. To obtain the chemical composition by modeling the observed spectra, it is important to take into account all relevant physical and chemical processes with sufficient level of details that doesn't oversimplify the interpretation of the complex molecular spectra. The model developed is versatile and can be applied to in situ measurements and observations of other comets and molecules. The combination of these powerful tools results in an innovative and unique opportunity to advance our knowledge of parent molecules in comets, and any compositional variations from comet to comet, thereby gaining clues to understanding the origins of the solar system and possibly the origins of life on Earth.
Acknowledgements: We acknowledge funding and support from the SwRI Internal Research and Development Program and the NSF Planetary Astronomy Program.
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