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GEMS JWST: Hold on to Your HATS(-6 b), a Subsolar-metallicity Giant Planet with Water, Methane, and Ammonia in its Atmosphere

  • Authors: Giannina Guzmán Caloca, Caleb I. Cañas, Nicole L. Wallack, Erin M. May, Shang-Min Tsai, Simon Müller, Ravit Helled, Shubham Kanodia, Jacob Lustig-Yaeger, Knicole D. Colón, Ian Czekala, Megan Delamer, Peter Gao, Te Han, Jessica Libby-Roberts, Suvrath Mahadevan, Anjali A. A. Piette, Guđmundur Stefánsson, Kevin B. Stevenson

Giannina Guzmán Caloca et al 2026 The Astronomical Journal 172 .

  • Provider: AAS Journals

Caption: Figure 8.

Comparison of best-model fits per visit as well as posteriors for the most robustly detected species for our final POSEIDON model M2.5 (clouds + haze). Note that the visit-by-visit retrievals were performed at pixel-level resolution (Section 3.5), but are plotted here against the coadded Eureka1 spectra for easier visualization. For reference, Figure J1 shows the individual spectral contribution of each molecular species to the final model shown above.

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