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High Water D/H Ratio of the Interstellar Object 3I/ATLAS is Consistent with a Low-metallicity Origin

  • Authors: Kenji Furuya, Martin Cordiner, Dominique Bockelée-Morvan, Dennis Bodewits, Colin Orion Chandler, Maria N. Drozdovskaya, Nathan X. Roth, Geronimo Villanueva

Kenji Furuya et al 2026 The Astrophysical Journal Letters 1009 .

  • Provider: AAS Journals

Caption: Figure 3.

Similar to Figure 2, but for the methane D/H ratio normalized by the water D/H ratio. Red and blue outlines highlight parameter sets for which the normalized ratio is close to that of 3I/ATLAS and 67P/C-G, respectively (allowing a 30% deviation from 3.5 and 4.8). Magenta outlines indicate parameter sets whose normalized ratios are consistent with both 3I/ATLAS and 67P/C-G within the adopted tolerance.

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