Numerical Modelling of the Deep Impact Vapour Plume

Details Numerical Modelling of the Deep Impact Vapour Plume Numerical Modelling of the Deep Impact Vapour Plume

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005dps....37.4417k&link_type=abstract

American Astronomical Society, DPS meeting #37, #44.17; Bulletin of the American Astronomical Society, Vol. 37, p.1569

Astronomy and Astrophysics

Astronomy

Scientific paper

On July 4th 2005 the 370 kg impactor of NASA's Deep impact mission hit the nucleus of comet 9P/Tempel-1 at a relative speed of 10.2 km s-1. A series of images taken by the DI spacecraft immediately after the impact (t < 1 s) shows the high-speed propagation of a cloud through the cometary atmosphere. A time-dependent twodimensional axisysmmetric gasdynamic model was used to simulate this initial phase of the impact. The qualitative shape of the impact cloud is well reproduced by the model. A comparison of the computed propagation speeds with the data gives clues on the energy partitioning of the impact.

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