The formation heritage of Jupiter Family Comet 10P/Tempel 2 as revealed by infrared spectroscopy

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Comet 10P/Tempel 2 (hereafter 10P) was observed after its perihelion passage in 2010 using highdispersion infrared spectroscopy. We present production rates, abundances, and spatial information of eight major volatile species: H2O, HCN, C2H6, CH3OH, NH3, and (3 ) upper limits for NH2, C2H2, and H2CO. In particular, our campaign was contemporaneous with a jet-like feature observed at optical and visual wavelengths in 2010 mid-July. Spatial profiles of primary volatiles display strong enhancements toward the jet direction and to a lesser extent in the anti-jet direction, which favors the idea of direct sublimation in response to local insolation. We discuss possible formation scenarios for this Jupiter Family Comet based on chemical composition and cosmogonic parameters retrieved by our observations.

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