Characterizing the coldest directly imaged companions through direct spectroscopy has only recently become possible with the James Webb Space Telescope.
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Posted inAstrochemistry, Atmospheres, Climate, Weather, Beta Pictoris, Exoplanets, -moons, -comets, Icy Worlds, Imaging & Spectroscopy, Interstellar, Status Report
13CO And Potential Variability In β Pictoris b With GRAVITY+
The 12CO/13CO ratio was introduced as an indicator for where in the disk a planet has formed. Previously a lower value compared to the host star’s was suggested to show […]
Posted inAtmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Press Release
Atmospheric Constraints On GJ 1214 b From CRIRES+ And Prospects For Characterisation With ANDES
In this study, we aim to constrain the atmospheric composition of GJ 1214 b using all available transits observed with the upgraded CRIRES+ spectrograph at the VLT by searching for […]
Posted inAstrochemistry, Biochemistry & Organic Chemistry, Biosignatures & Paleobiology, Imaging & Spectroscopy, Interstellar, Status Report
ExoMol Line Lists — LXIII: ExoMol Line Lists For 12 Isotopologues Of CO2
Extensive rovibrational line lists are constructed for 12 isotopologues of carbon dioxide: 12C16O2, 13C16O2, 12C17O2, 13C17O2, 12C18O2, 13C18O2, 16O12C17O, 16O12C18O, 16O13C17O, 16O13C18O, 17O12C18O, and 17O13C18O.
Posted inAstrochemistry, Astronomy & Telescopes, Atmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Habitable Zones, Imaging & Spectroscopy, Status Report
A Systematic Search for Trace Molecules in Exoplanet K2-18 b
The first transmission spectrum of the habitable-zone sub-Neptune K2-18 b with JWST has opened a new avenue for atmospheric characterisation of temperate low-mass exoplanets.
Posted inAstrochemistry, Astronomy & Telescopes, Atmospheres, Climate, Weather, Biochemistry & Organic Chemistry, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Gas Giants, Imaging & Spectroscopy, Status Report
JWST-TST DREAMS: A Precise Water Abundance for Hot Jupiter WASP-17b from the NIRISS SOSS Transmission Spectrum
Water has proven to be ubiquitously detected in near-infrared (NIR) transmission spectroscopy observations of hot Jupiter atmospheres, including WASP-17b.
Posted inAstrochemistry, Astronomy & Telescopes, Atmospheres, Climate, Weather, Biogeochemical Cycles & Geobiology, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report
Detectability of Polycyclic Aromatic Hydrocarbons in the Atmosphere of WASP-6 b with JWST NIRSpec PRISM
Polycyclic Aromatic Hydrocarbons (PAHs) have been detected throughout the universe where they play essential roles in the evolution of their environments.
![Synthetic spectra for a XPAH = 10−6 at temperatures of 800 K (top), 1200 K (middle), and 1600 K (bottom). Similar to Fig. A1, with constant C/O (0.55) and varying metallicities ([Fe/H]) are displayed for 0.1 (left) in green, 1 (middle) in cyan and 10 (right) in yellow. -- astro-ph.EP](https://i0.wp.com/astrobiology.com/wp-content/uploads/2024/11/Polycyclic-Aromatic-Hydrocarbons-in-Exoplanet-Atmospheres.png?resize=1200%2C720&ssl=1)
Posted inAstrochemistry, Astronomy & Telescopes, Atmospheres, Climate, Weather, Biochemistry & Organic Chemistry, Biosignatures & Paleobiology, Gas Giants, Imaging & Spectroscopy, Status Report
Polycyclic Aromatic Hydrocarbons in Exoplanet Atmospheres: A Detectability Study
In this paper, we explore the detectability of polycyclic aromatic hydrocarbons (PAHs) under diverse planetary conditions, aiming to identify promising targets for future observations of planetary atmospheres.
Posted inAstrochemistry, Atmospheres, Climate, Weather, Brown Dwarfs, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report
Water Depletion and 15NH3 in the Atmosphere of the Coldest Brown Dwarf Observed With JWST/MIRI
With a temperature of ∼285 K WISE0855 is the coldest brown dwarf observed so far. Using the James Webb Space Telescope (JWST) we obtained observations that allow us to characterize […]
Posted inAstronomy & Telescopes, Atmospheres, Climate, Weather, Brown Dwarfs, Exoplanets, -moons, -comets, Gas Giants, Imaging & Spectroscopy, Press Release
Fresh View Of The Hot Brown Dwarf HD 984 B Through High-resolution Spectroscopy
Context. High-resolution spectroscopy has the potential to drive a better understanding of the atmospheric composition, physics, and dynamics of young exoplanets and brown dwarfs, bringing clear insights into the formation […]