ESA’s exoplanet mission Cheops confirmed the existence of four warm exoplanets orbiting four stars in our Milky Way. These exoplanets have sizes between Earth and Neptune and orbit their stars […]
Atmospheres, Climate, Weather
Posted inAstronomy & Telescopes, Atmospheres, Climate, Weather, Biosignatures & Paleobiology, Habitable Zones, Imaging & Spectroscopy, Status Report
Precise Transit Photometry Using TESS: Updated Physical Properties for 28 Exoplanets Around Bright Stars
The TESS follow-up of a large number of known transiting exoplanets provide unique opportunity to study their physical properties more precisely.
Posted inAtmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Exoplanets, -moons, -comets, Habitable Zones, Status Report
Stratospheric Dayside-to-nightside Circulation Drives The 3-D Ozone Distribution On Synchronously Rotating Rocky Exoplanets
Determining the habitability and interpreting future atmospheric observations of exoplanets requires understanding the atmospheric dynamics and chemistry from a 3-D perspective.
Posted inAtmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Habitable Zones, Status Report, Titan
Humid Evolution of Haze in the Atmosphere of Super-Earths in the Habitable Zone
Photochemical hazes are expected to form and significantly contribute to the chemical and radiative balance of exoplanets with relatively moderate temperatures, possibly in the habitable zone of their host star.
![Transmission and weighting functions in the longwave TIR (CO2 𝜈2 band at 15 𝜇m, nadir view, Earth’s midlatitude summer (MLS) atmosphere (Anderson et al. 1986), Gaussian response function of half width Γ = 0.25 cm−1 corresponding to a resolution 𝑅 ≈ 2800.). The upper panels show the transmission as a function of wavenumber for several atmospheric paths (right) and transmission vs. altitude (related to path length 𝑠 = 𝑧ToA − 𝑧) for selected wavenumbers (left). The lower panel shows individual weighting functions for selected wavenumbers (left) and a contour plot. Numbers in the left legends indicate the wavenumber [cm−1 ] and the corresponding peak altitude [km] (bottom-left). -- astro-ph.EP](https://i0.wp.com/astrobiology.com/wp-content/uploads/2023/06/assessment.png?resize=1200%2C719&ssl=1)
Posted inAstrochemistry, Atmospheres, Climate, Weather, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report
Assessment of a Physics-based Retrieval of Exoplanet Atmospheric Temperatures from Infrared Emission Spectra
Atmospheric temperatures are to be estimated from thermal emission spectra of Earth-like exoplanets orbiting M-stars as observed by current and future planned missions.
Posted inAstronomy & Telescopes, Atmospheres, Climate, Weather, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Habitable Zones, Status Report
The CARMENES Search For Exoplanets Around M Dwarfs. A Sub-Neptunian Mass Planet In The Habitable Zone Of HN Lib
We report the discovery of HN Lib b, a sub-Neptunian mass planet orbiting the nearby (d≈ = 6.25 pc) M4.0 V star HN Lib detected by our CARMENES radial-velocity (RV) […]
Posted inAstrochemistry, Atmospheres, Climate, Weather, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Press Release
Webb Maps and Finds Traces of Water in an Ultra-hot Gas Giant’s Atmosphere
There’s an intriguing exoplanet out there – 400 light-years out there – that is so tantalizing that astronomers have been studying it since its discovery in 2009. A year for […]
Posted inAstronomy & Telescopes, Atmospheres, Climate, Weather, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report
Awesome SOSS: Atmospheric Characterisation of WASP-96 b using the JWST Early Release Observations
The newly operational JWST offers the potential to study the atmospheres of distant worlds with precision that has not been achieved before.
Posted inAtmospheres, Climate, Weather, Biochemistry & Organic Chemistry, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Origin & Evolution of Life, Press Release
Formation of Amino Acids and Carboxylic Acids in Weakly Reducing Planetary Atmospheres by Solar Energetic Particles from the Young Sun
Life most likely started during the Hadean Eon; however, the environmental conditions which contributed to the complexity of its chemistry are poorly known.
Posted inAtmospheres, Climate, Weather, Mapping, Geodesy, Cartography, Bathymetry, Mars, Press Release
Diurnal and Seasonal Mapping of Martian Ices with EMIRS
Condensation and sublimation of ices at the surface of the planet is a key part of both the Martian H2O and CO2 cycles, either from a seasonal or diurnal aspect.