Carbon dioxide (CO2) is a key chemical species that is found in a wide range of planetary atmospheres. In the context of exoplanets, CO2 is an indicator of the metal […]
astro-ph.EP
Posted inAstrochemistry, Biosignatures & Paleobiology, Exoplanets, -moons, -comets, Habitable Zones, Press Release
Is Ozone A Reliable Proxy For Molecular Oxygen? I. The O2-O3 Relationship For Earth-like Atmospheres
Molecular oxygen (O2) paired with a reducing gas is regarded as a promising biosignature pair for the atmospheric characterization of terrestrial exoplanets. In circumstances when O2 may not be detectable […]
Posted inMars, Press Release
A Two Martian Years Survey of Water Ice Clouds on Mars with ACS onboard TGO
The middle infrared (MIR) channel of the Atmospheric Chemistry Suite (ACS) instrument onboard the ExoMars Trace Gas Orbiter (TGO) ESA-Roscosmos mission has performed Solar occultation measurements of the Martian atmosphere […]
Posted inAstrochemistry, Exoplanets, -moons, -comets, Press Release
Chemical Evolution In Ices On Drifting, Planet-forming Pebbles
Image: Abundances of volatile ices on a drifting pebble as a function of radius (time), where the pebbles moves inwards with time. Left is drift from 128AU, right is drift […]
Posted inBiosignatures & Paleobiology, Exoplanets, -moons, -comets, Press Release
Alternative Methylated Biosignatures I: Methyl Bromide, A Capstone Biosignature
Comparison of emission features for atmospheres with methylated biogenic gases around a K6V, M3.5Ve and M5V star. From top to bottom: CH3Cl, CH3Br, combination of CH3Cl and CH3Br for a […]
Posted inAstrochemistry, Astrogeology, Exoplanets, -moons, -comets, Press Release
The Molecular Composition Of Shadowed Protosolar Disk Midplanes Beyond The Water Snowline
Image: Pie charts of the percentage contributions of the dominant carbon-bearing molecules to the total elemental carbon abundance (= 1.4 × 10−4 , top panels), the dominant oxygen-bearing molecules to […]
Posted inPress Release, TRAPPIST-1
Greater Climate Sensitivity And Variability On TRAPPIST-1e Than Earth
The atmospheres of rocky exoplanets are close to being characterized by astronomical observations, in part due to the commissioning of the James Webb Space Telescope. These observations compel us to […]
Posted inExoplanets, -moons, -comets, Press Release
TOI-1452 b: SPIRou And TESS Reveal A Super-Earth In A Temperate Orbit Transiting An M4 Dwarf
Exploring the properties of exoplanets near or inside the radius valley provides insights on the transition from the rocky super-Earths to the larger, hydrogen-rich atmosphere mini-Neptunes. Here, we report the […]
Posted inAstrochemistry, Biochemistry & Organic Chemistry, Biosignatures & Paleobiology, Status Report, Titan
Vertical Distribution Of Cyclopropenylidene And Propadiene In The Atmosphere Of Titan
Titan’s atmosphere is a natural laboratory for exploring the photochemical synthesis of organic molecules.
Posted inBiosignatures & Paleobiology, Exploration Gear & Tech, Imaging & Spectroscopy, Nanotechnology & SynBio, Status Report, Tricorders & Sensors
Assessing Planetary Complexity and Potential Agnostic Biosignatures Using Epsilon Machines
We present a new approach to exoplanet characterisation using techniques from complexity science, with potential applications to biosignature detection.