Hypervelocity Impact Flare Models

Statistics – Applications

Scientific paper

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5420 Impact Phenomena, Cratering (6022, 8136), 6022 Impact Phenomena (5420, 8136)

Scientific paper

The short-duration flare due to high speed impacts on solar system objects without atmospheres is modeled using an exact solution of the equation of motion for a polytropic gas expanding into a vacuum. Depending on assumptions regarding the energy budget involving transfer of impact kinetic energy into impactor vaporization, ground motion, and initial internal energy of the flare, the subsequent evolution of the high temperature flare is investigated. The transition from an initial flare to the well known self-similar solution is considered and possible applications to such missions as Deep Impact (impact on a comet) and SMART I (impact on the Moon) are examined. The temperature decay and its relation to particulate condensation and thermal radiation are also briefly explored.

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