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The Diversity of Cold Worlds: Age and Characterization of the Exoplanet COCONUTS-2 b

  • Authors: Rocio Kiman, Charles A. Beichman, Azul Ruiz Diaz, Jacqueline K. Faherty, Brianna Lacy, Genaro Suárez, Federico Marocco, J. Davy Kirkpatrick, Jonathan Gagné, Jessica Copeland, Ben Burningham, Niall Whiteford, Melanie J. Rowland, Daniella C. Bardalez Gagliuffi, Johanna M. Vos, Adam C. Schneider, Eileen C. Gonzales, Sherelyn Alejandro Merchan, Austin Rothermich, Richard Smart, Edgardo Costa, Rene A. Mendez

Rocio Kiman et al 2026 The Astronomical Journal 171 .

  • Provider: AAS Journals

Caption: Figure 6.

C/O ratio measurements for the members of CUMA. These measurements were estimated from the [C/Fe] and [O/Fe] abundances from the APOGEE DR17 and GALAH DR3 catalogs. We included in a vertical line the C/O ratio result for COCONUTS-2 b from the forward-modeling analysis in this paper (see Section 5.2), which agrees with the values from the group. This suggests that COCONUTS-2 b is a member of CUMA, and also it is likely to have formed in the same mechanism as a star.

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