JWST MIRI/LRS data combined with archival observations detect magnesium silicate clouds (likely Mg2SiO4) in HD 209458b at 1-10 mbar with ~0.1 micron particles using a new rule-based data reduction approach.
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MELTYQ couples magma-atmosphere equilibrium models with spectral retrievals to constrain sub-Neptune magma oxidation states and volatile inventories from transmission spectra.
The atmosphere of TOI-1130b shows high metallicity, low C/O, and elevated mean molecular weight consistent with ex-situ formation beyond the water ice line.
Photochemical kinetic-transport models indicate CS2 abundance in gas giant exoplanets peaks at Teq 500-700 K through CH4-H2S chemistry with S2 photolysis as the driver.
Direct pixel-level extraction of NIRISS spectra for WASP-18b followed by cross-correlation yields 4.4σ CO, 3.4σ H2O, and 7.8σ OH detections, with improved abundance constraints from subsequent retrievals.
JWST/NIRCam observations of 2024 YR4 extend the orbital arc by eight months, reduce 2032 lunar encounter uncertainty by >30x, and rule out impact with a 22,900 ± 800 km miss distance.
J0404+1112 is a 2.93 hr period totally eclipsing WD+BD system with a hot DA white dwarf (T_eff ~28,000 K) and ~40 M_Jup brown dwarf, enabling isolation of nightside emission and serving as a JWST atmospheric benchmark.
Clouds drive over 1000 K heating at depth in sub-Neptune atmospheres, producing molten mantle interfaces for most planets in the sample and increasing abundances of O2, SiH4, and SiO by at least 36 percent.
Young M dwarf flares exert greater chemical stress on primordial exo-Earth atmospheres than previous models, with potential for lasting changes in mixing ratios especially for low-abundance species.
Tier 1 Ariel spectra suffice for sub-1.5 dex constraints on H2O and CO2 in giant-planet atmospheres, with higher tiers providing only incremental gains and more molecules in select cases.
WASP-96b shows super-solar metallicity of 2-6x stellar, roughly stellar C/O, tentative SO2 consistent with photochemistry, and an optical slope from scattering aerosols, supporting core-accretion formation beyond the water snowline.
Adapts and benchmarks a 1D plume model to predict volcanic plume heights across varied exoplanet gravities, compositions, and stratifications, identifying detectable low-pressure penetration regimes.
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J0404+1112: A 3-Hour Eclipsing White Dwarf-Brown Dwarf Probing Multiple Atmospheric Regimes
J0404+1112 is a 2.93 hr period totally eclipsing WD+BD system with a hot DA white dwarf (T_eff ~28,000 K) and ~40 M_Jup brown dwarf, enabling isolation of nightside emission and serving as a JWST atmospheric benchmark.