Characterizing the coldest directly imaged companions through direct spectroscopy has only recently become possible with the James Webb Space Telescope.
GJ 504 b
![Final best fit for VHS 1256 b. Top panel: same as Fig. 8, but using the two-column approach. Best fit parameters are Teff = 1153 K, log g = 4.0 dex, [M/H] = 0.08 dex, C/O = 0.60, R = 1.2 RJup, with an α = 0.62 so a linear combination of fsed = 0.7 (62%) in grey dashed and fsed = 2.4 (38%) in grey solid line. Both grey fsed components have been scaled by their proportion and multiplied by a factor of 0.6 for visibility. The two fsed component spectra are shown with reduced resolution for visibility. Bottom panel: same as Fig. 8. -- astro-ph.EP](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/06/Next-generation.png?resize=1200%2C719&ssl=1)
Posted inAtmospheres, Climate, Weather, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report
Next-generation Exo-REM Atmospheric Models: Application To VHS 1256 b To Emulate Patchy Clouds
Condensate clouds are a defining feature of brown dwarf and exoplanet atmospheres, producing a broad range of colours on the CMD and giving rise to spectral features such as the […]
Posted inAstrochemistry, Astrogeology, Astronomy & Telescopes, Atmospheres, Climate, Weather, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report
First Unambiguous Detection Of Ammonia In The Atmosphere Of A Planetary Mass Companion With JWST/MIRI Coronagraphs
The newly accessible mid-infrared (MIR) window offered by the James Webb Space Telescope (JWST) for exoplanet imaging is expected to provide valuable information to characterize their atmospheres.