Stefan Pelletier
3 papers · Latest:
Exoplanets & Planetary Science
HAT-P-70b through the Eyes of MAROON-X: Constraining Elemental Abundances of Metals and Insights on Atmosphere Dynamics
MAROON-X observations of ultra-hot Jupiter HAT-P-70b reveal 14 metal species, day-to-night winds, and a nickel enrichment, highlighting the need for accurate ionization modeling.
2605.07873
Exoplanets & Planetary ScienceThe Days Drag On on WASP-121 b: Interpreting its NIRISS Spectroscopic Phase Curve with General Circulation Models
This paper interprets JWST/NIRISS data for ultra-hot Jupiter WASP-121 b using 3D models, revealing model-data tension, atmospheric drag, and nightside clouds.
2605.01589
Exoplanets & Planetary ScienceSuper-Earth masses and stellar abundances from NIRPS reveal tentative evidence for water-rich formation around M dwarfs
NIRPS observations of super-Earths around M dwarfs show lower-than-expected core mass fractions, suggesting water-rich formation.
2604.07447
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