Study of the Collimated Jets in the Deep Space 1 Images of Comet 19P/Borrelly

Details Study of the Collimated Jets in the Deep Space 1 Images of Comet 19P/Borrelly Study of the Collimated Jets in the Deep Space 1 Images of Comet 19P/Borrelly

Sep 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009dps....41.3715m&link_type=abstract

American Astronomical Society, DPS meeting #41, #37.15

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On September 22, 2001, Deep Space 1 spacecraft (DS1) flew by comet 19P/Borrelly. We plan to examine the ground-based images taken from the McDonald Observatory, as well as the images taken during the approach and flyby of the spacecraft with the Miniature Integrated Camera and Spectrometer (MICAS) which can be found in the Planetary Data System's Small Bodies Node archives. These images from the Deep Space 1 mission show that the dust jets of 19P/Borrelly, demonstrate characteristics of collimation.
Due to the location of the jet on the rotation axis of comet Borrelly, physical characteristics, such as the rate and angle of expansion of the jet, can be accurately measured. This process will be completed for several points along the approach, flyby, and from the ground-based observatory. It is from this information that we plan to create a three-dimensional representation of the jet, which can be used to test models proposed for the collimation mechanism (e.g., Yelle 2004). Comet Borrelly is the best test for these models due to the variety of angles and observation times as well as the structure of the jet itself. The proposed models will be adjusted to see if they can clearly reproduce the data found from the observations of the Deep Space 1 spacecraft. With more research into this cometary mechanism, we will be able to show how a simple model will be applicable to jets on other comets. Using the information from the jets of 19P/Borrelly, scientists can also make assumptions on the composition, evolution, and physical conditions inside of the comet.
This research was supported by the NASA Planetary Data System: Small Bodies Node and College Student Investigators.
Yelle et al., Icarus 167, 30, 2004.

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