First JWST spectroscopy of GJ 504 b detects multiple molecules, retrieves atmospheric parameters including super-solar metallicity, and finds tentative support for planet-like formation.
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4 Pith papers cite this work. Polarity classification is still indexing.
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Observational study of 290 exoplanet-host stars finds higher C, O, S, Fe, Ni abundances in giant-planet hosts than small-planet hosts, with C/O ratios, hot/warm differences, and mass correlations that vary by subpopulation.
High-resolution near-IR spectroscopy on HWO is now technically feasible and would improve detection and characterization of exoplanet atmospheric features.