Other
Scientific paper
Oct 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011epsc.conf..197b&link_type=abstract
EPSC-DPS Joint Meeting 2011, held 2-7 October 2011 in Nantes, France. http://meetings.copernicus.org/epsc-dps2011, p.197
Other
Scientific paper
On 4th November 2010, the Deep Impact spacecraft successfully flew-by comet 103P/Hartley 2 at a distance of 700 km. Onboard the spacecraft, two cameras and one infrared spectrometer [1] monitored the coma several weeks before and after closest approach. In this paper we report on the temporal variations of CO2 (4.3 μm), H2O (2.7 μm) and also the combination of dust and water ice particles. We focus our study at closest approach ±10 days where the ratio CO2/H2O is seen to vary by a factor of 2 [2]. Given the orientation of the nucleus, this variation in the ratio suggests that the ratio CO2/H2O is not the same at different locations with one end richer in dry ice than the other. Broadband photometry in visible wavelengths is in phase with the two gaseous species. The CO2 and dust/ice grains are highly correlated, emphasizing the role of CO2 jets in brining water ice and dust into the coma.
A'Hearn Michael
Besse Sebastien
Farnham Tony
Feaga Lori
Groussin Olivier
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