[astro-ph.EP] One of the most striking findings of exoplanetary science is the ubiquity of clouds. A conventional approach to infer the cloud compositions is to utilize the thermochemical equilibrium model […]
HD 189733b
![[LEFT] Haze mass mixing ratio, q1 [g g−1 ] (left column), and haze particle size , rh [nm] (right column), for the short formation timescale simulation at 10−5 bar (top row), 10−4 bar (second row), 10−3 bar (third row) and 10−2 bar (bottom row) pressure levels. The sub-stellar point is located at (0◦, 0◦). {RIGHT} same as LEFT but for the long haze formation timescale. -- astro-ph.EP](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/06/Three-dimensional.png?resize=1200%2C720&ssl=1)
Posted inAtmospheres, Climate, Weather, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report
Three Dimensional Temporal Evolution Of Photochemical Haze In Exoplanet Atmospheres I. Description And Test Application To HD 189733b
The formation and global spatial distribution of photochemically produced haze particles remain a key process in exoplanet atmospheres for understanding their observed properties. We aim to develop a flexible haze […]
Posted inAstronomy & Telescopes, Atmospheres, Climate, Weather, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report
A Scatter of Light from a Polarized World
Many known exoplanets harbor clouds, which lead to degeneracies in spectroscopic models between particle composition and size. Polarimetry, however, provides independent assessment.
Posted inAstrochemistry, Astronomy & Telescopes, Atmospheres, Climate, Weather, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Gas Giants, Jupiter, Saturn, Status Report, Water/Hycean Worlds & Oceanography
A Photochemical PHO Network For Hydrogen-dominated Exoplanet Atmospheres
Due to the detection of phosphine PH3 in the Solar System gas giants Jupiter and Saturn, PH3 has long been suggested to be detectable in exosolar substellar atmospheres too. However, […]
Posted inAstronomy & Telescopes, Atmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Exoplanets, -moons, -comets, Status Report
The PEPSI Exoplanet Transit Survey (PETS). V: New Na D Transmission Spectra Indicate A Quieter Atmosphere On HD 189733b
Absorption lines from exoplanet atmospheres observed in transmission allow us to study atmospheric characteristics such as winds.