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Deep Impact ejection from Comet 9P/Tempel 1 as a triggered outburst

Published online by Cambridge University Press:  06 April 2010

Sergei I. Ipatov  and
Michael F. A'Hearn
Sergei I. Ipatov
Affiliation:
Catholic University of America, Washington DC, USA email: siipatov@hotmail.com
Michael F. A'Hearn
Affiliation:
Dept. of Astronomy, University of Maryland, College Park, MD, USA email: ma@astro.umd.edu
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Abstract

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Ejection of material after the Deep Impact collision with Comet Tempel 1 was studied based on analysis of the images made by the Deep Impact cameras during the first 13 minutes after impact. Analysis of the images shows that there was a local maximum of the rate of ejection at time of ejection ~10 s with typical velocities ~100 m/s. At the same time, a considerable excessive ejection in a few directions began, the direction to the brightest pixel changed by ~50°, and there was a local increase of brightness of the brightest pixel. The ejection can be considered as a superposition of the normal ejection and the longer triggered outburst.

Keywords

comets: generalsolar system: general
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 5 , Symposium S263: Icy Bodies of the Solar System , August 2009 , pp. 317 - 321
Copyright
Copyright © International Astronomical Union 2010

References

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Ipatov, S. I. & A'Hearn, M. F. 2008, http://arxiv.org/abs/0810.1294Google Scholar
Ipatov, S. I. & A'Hearn, M. F. 2009, Lunar. Planet. Sci. XL, 1022 (abstract)Google Scholar