Velocities and Relative Amount of Material Ejected after the Deep Impact Collision

Details Velocities and Relative Amount of Material Ejected after the Deep Impact Collision Velocities and Relative Amount of Material Ejected after the Deep Impact Collision

Oct 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007dps....39.2101i&link_type=abstract

American Astronomical Society, DPS meeting #39, #21.01; Bulletin of the American Astronomical Society, Vol. 39, p.449

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Velocities and relative amounts of material ejected from Comet 9P/Tempel 1 during the first seven minutes after the collision of the Deep Impact impactor with the comet are studied based on images made by Deep Impact cameras. Such detailed studies were not made earlier at 1 sec 4 s were smaller by an order of magnitude than those at t<1 s (hundreds of m/s instead of several km/s). Projections of velocities of most of ejected material onto the plane perpendicular to the line of sight were obtained to be 200 m/s and are in accordance with various ground observations and observations made by space telescopes. There was a considerable continuous ejection of material during considered 7 minutes after the collision. The rate of production of ejected material probably had a peak at 0.5-0.7 s. The amount of material ejected per unit of time probably mainly decreased with time t after the first minute after the ejection, but this decrease was slower at t 6 minutes or may be there was even a local increase of ejection rate at t 6 min. The rate of ejection at 8

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