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Supersolar Metallicity and Tentative Evidence for Photochemistry on WASP-96 b from JWST and Ground-based VLT Transmission Spectroscopy

  • Authors: Michael Radica, Jake Taylor, Yoav Rotman, Jasmina Blecic, Luis Welbanks, Eva-Maria Ahrer, Duncan Christie, Louis-Philippe Coulombe, Gillis Lowry, Matthew M. Murphy, Adina D. Feinstein, David Lafrenière, Ryan J. MacDonald, Nathan J. Mayne, Shang-Min Tsai, Maria Zamyatina

Michael Radica et al 2026 The Astronomical Journal 171 .

  • Provider: AAS Journals

Caption: Figure 8.

Distribution of δAH values from 10,000 injection-recovery tests with no underlying limb asymmetry. The red dashed curve shows the best-fitting Gaussian distribution (μ = −0.012, σ = 0.717). The observed δAH (black dashed line) for the 1.4 μm H2O band of 2.13 is in the 99.72th percentile of the distribution, making it a ∼2.6σ outlier. Read another way, potential morning–evening asymmetry around 1.4 μm is ∼2.6σ significant based on this test.

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