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Using Chandra ACIS-S, we have obtained low-resolution imaging X-ray spectrophotometry of the Pluto system in support of the New Horizons flyby on 14 July 2015. Observations were obtained in a trial “seed” campaign conducted in one visit on 24 Feb 2014, and a follow-up campaign conducted soon after the New Horizons flyby that consisted of 3 visits spanning 26 Jul to 03 Aug 2015. In a total of 174 ksec...
A coupled chemistry–transport model is developed to study the production and loss of neutral atomic carbon and oxygen in the inner coma (≤10 4 km) of Comet Halley. Subsequently, the generation of OI 1304 Å and OI 1356 Å and CI 1561 Å and CI 1657 Å emissions is studied. Calculations are performed utilizing solar EUV, utilizing photoelectrons, and assuming the precipitation of high energy “auroral”...
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