Cometary Isotopic Measurements

Bockelee-Morvan, Dominique; Calmonte, Ursina Maria; Charnley, Steven; Duprat, Jean; Engrand, Cecile; Gicquel, Adeline; Hässig, Myrtha; Jehin, Emmanuel; Kawakita, Hideyo; Marty, Bernard; Milam, Stefanie; Morse, Andrew; Rousselot, Philippe; Sheridan, Simon; Wirstrom, Eva (2015). Cometary Isotopic Measurements. Space science reviews, 197(1-4), pp. 47-83. Kluwer Academic Publishers 10.1007/s11214-015-0156-9

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Isotopic ratios in comets provide keys for the understanding of the origin of cometary material, and the physical and chemical conditions in the early Solar Nebula. We review here measurements acquired on the D/H, N-14/N-15, O-16/O-18, C-12/C-13, and S-32/S-34 ratios in cometary grains and gases, and discuss their cosmogonic implications. The review includes analyses of potential cometary material available in collections on Earth, recent measurements achieved with the Herschel Space Observatory, large optical telescopes, and Rosetta, as well as recent results obtained from models of chemical-dynamical deuterium fractionation in the early solar nebula. Prospects for future measurements are presented.

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