Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007dps....39.2105f&link_type=abstract
American Astronomical Society, DPS meeting #39, #21.05; Bulletin of the American Astronomical Society, Vol. 39, p.450
Astronomy and Astrophysics
Astronomy
Scientific paper
On July 4, 2005, the Deep Impact (DI) HRI-IR Spectrometer collected 1.05 to 4.8 micron spectra of the coma and ejecta of 9P/Tempel 1 before, during, and after the impact experiment. Compositional asymmetries in H2O and CO2 are known to exist in the near-nucleus coma prior to the impact event and H2O ice has been detected in the ejecta. This paper focuses on modeling the spectra of volatiles and organics released into the near-nucleus coma and ejecta by the impact. Spectral modeling created before DI arrived at Tempel 1 has been modified to account for the high dust continuum and H2O ice component present in the ejecta and post-impact coma. We present results from the modified model and show reasonable spectral fits to the HRI-IR data. We demonstrate the detectability of minor molecular species as well as the uniqueness of species identification given the resolution of the data.
A'Hearn Michael F.
Feaga Lori M.
Groussin Olivier
Sunshine Jessica
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