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Deep Impact: observations from a worldwide Earth-based campaign |
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| Authors: | Meech K J Ageorges N A'Hearn M F Arpigny C Ates A Aycock J Bagnulo S Bailey J Barber R Barrera L Barrena R Bauer J M Belton M J S Bensch F Bhattacharya B Biver N Blake G Bockelée-Morvan D Boehnhardt H Bonev B P Bonev T Buie M W Burton M G Butner H M Cabanac R Campbell R Campins H Capria M T Carroll T Chaffee F Charnley S B Cleis R Coates A Cochran A Colom P Conrad A Coulson I M Crovisier J deBuizer J Dekany R de Léon J Dello Russo N Delsanti A DiSanti M Drummond J Dundon L Etzel P B Farnham T L Feldman P Fernández Y R Filipovic M D Fisher S Fitzsimmons A Fong D Fugate R Fujiwara H Fujiyoshi T |
| Affiliation: | Institute for Astronomy, University of Hawaii at Manoa, 2680 Woodlawn Drive, Honolulu, HI 96822, USA. |
| Abstract: | On 4 July 2005, many observatories around the world and in space observed the collision of Deep Impact with comet 9P/Tempel 1 or its aftermath. This was an unprecedented coordinated observational campaign. These data show that (i) there was new material after impact that was compositionally different from that seen before impact; (ii) the ratio of dust mass to gas mass in the ejecta was much larger than before impact; (iii) the new activity did not last more than a few days, and by 9 July the comet's behavior was indistinguishable from its pre-impact behavior; and (iv) there were interesting transient phenomena that may be correlated with cratering physics. |
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