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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 8.

(a–d) Spectrally integrated flux maps for all detected H2CO transitions in K2, with traces and labels as in Figure 1. Contours are in 5σ increments for H2CO (JKa,Kc = 51,5 − 41,4). Contours are 3σ and 5σ for H2CO (JKa,Kc = 50,5–40,4), (JKa,Kc = 40,4–30,3), (JKa,Kc = 42,2 − 32,1), and (JKa,Kc = 42,3–32,3).

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