Wide-field Spectroscopic Observations of Comet 8P/Tuttle by GALEX

Astronomy and Astrophysics – Astronomy

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Scientific paper

Comet 8P/Tuttle was observed by the Galaxy Evolution Explorer GALEX UT 2007 December 6 -- 8, 10, 12, 26, and 2008 January 2. GALEX is a NASA Small Explorer (SMEX) mission designed to map the history of star formation in the Universe (Martin et al. 2005). It is also well suited to cometary coma studies because of its high sensitivity and large field of view. OH and CS in the NUV (175--310 nm) are clearly detected in all of the data. The FUV detector was only operational during the last two observations. C I is clearly detected in this band. We present an analysis of scale lengths and production rates of these species as well as a comparison to comet C/2004 Q2 (Machholz) data recorded with GALEX UT 2005 March 1. This work is supported by the GALEX guest investigator program.

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