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JWST MEP—A World Under Spotty Starlight: Detection of CO2 and H2O in the Hot Saturn WASP-52b with JWST NIRSpec G395H

  • Authors: Yanbo Pan, 彦博 潘, Ryan J. MacDonald, Néstor Espinoza, Bibiana Prinoth, Zafar Rustamkulov, Luis Welbanks, Daniel Kitzmann, Nicolas Crouzet, Anna Walde, Diana Powell, Eva-Maria Ahrer, Adam J. Burgasser, Duncan A. Christie, Wolf Cukier, Carlos Gascón, Måns Holmberg, Thomas Kennedy, Mercedes López- Morales, N. J. Mayne, Dominic Samra, Arjun B. Savel, Maria E. Steinrueck, Christopher P. Wirth

Yanbo Pan et al 2026 The Astronomical Journal 172 .

  • Provider: AAS Journals

Caption: Figure 6.

The NIRISS/SOSS (M. Fournier-Tondreau et al. 2025) and NIRSpec/G395H combined spectra overplotted with the atmosphere+spots spectral model fitted with the NIRSpec/G395H TRANSITSPECTROSCOPY data. The varying slope toward the short wavelength (≤1.5μm) is potentially indicative of the time variability of stellar active regions (starspots and faculae) on the host star.

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