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The Evolution in Coma Molecular Composition of Comet C/2017 K2 (PanSTARRS) across the H2O Sublimation Zone: ALMA Imaging of a H2O-dominated Coma

  • Authors: Nathan X. Roth, Stefanie N. Milam, Martin A. Cordiner, Anthony J. Remijan, Dominique Bockelée-Morvan, Nicolas Biver, Jérémie Boissier, Steven B. Charnley, Charles E. Woodward, Lillian X. Hart, Timothy N. Proudkii

Nathan X. Roth et al 2026 The Planetary Science Journal 7 .

  • Provider: AAS Journals

Caption: Figure 7.

Upper: molecular abundances in K2 with respect to H2O measured with IRTF (C. Ejeta et al. 2025), JWST (C. E. Woodward et al. 2025), and ALMA (this work). Middle: same as the left panel, but for abundances with respect to CO. Lower: absolute molecular production rates measured with each facility. Mean values are taken from N. Dello Russo et al. (2016), N. X. Roth et al. (2023), and references therein.

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