Pure ice grains in the coma of 9P/Tempel 1 after Deep Impact

Details Pure ice grains in the coma of 9P/Tempel 1 after Deep Impact Pure ice grains in the coma of 9P/Tempel 1 after Deep Impact

Oct 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011epsc.conf..233g&link_type=abstract

EPSC-DPS Joint Meeting 2011, held 2-7 October 2011 in Nantes, France. http://meetings.copernicus.org/epsc-dps2011, p.233

Physics

Scientific paper

The Deep Impact (DI) spacecraft encountered comet 9P/Tempel 1 on July 4th, 2005. The spacecraft released an impactor that collided with the comet nucleus and excavated (possibly unprocessed) cometary material in a prominent ejecta plume. We report on the temporal evolution of water molecules observed with the IRS instrument on the Spitzer Space telescope after impact. We show that it can only be explained by the presence of subliming pure ice grains. The mass of water ice in subliming 0.1 - 1 μm grains is close to 2 x 106 kg.

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