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K2-18b Does Not Meet the Standards of Evidence for Life

  • Authors: Kevin B. Stevenson, Jacob Lustig-Yaeger, E. M. May, Ravi K. Kopparapu, Thomas J. Fauchez, Jacob Haqq-Misra, Mary Anne Limbach, Edward W. Schwieterman, Kristin S. Sotzen, Shang-Min Tsai

Kevin B. Stevenson et al 2025 The Astronomical Journal 170 .

  • Provider: AAS Journals

Caption: Figure 6.

The complete figure set (3 images) is available in the online journal.

Retrieval results on the full spectrum for three difference MIRI pixel shifts. The top panel shows the transit spectrum with the median retrieved spectral model and representative 1σ and 2σ credibility envelopes. The lower subpanels show the inferred 1D marginalized posterior distributions for the isothermal temperature (T), CH4, CO2, C2H4, DMS, DMDS, and C2H5Cl.

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