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Keith Cowing
Explorers Club Fellow, ex-NASA Space Station Payload manager/space biologist, Away Teams, Journalist, Lapsed climber, Synaesthete, Na’Vi-Jedi-Freman-Buddhist-mix, ASL, Devon Island and Everest Base Camp veteran, (he/him) 🖖🏻
Posted inExoplanets, -moons, -comets
The Metallicity Of Giant Exoplanets Around Low-mass Stars And How Ariel Can Help
[astro-ph.EP] Giant planets orbiting low-mass stars represent a unique population of giant planets that can be studied to constrain planet formation theory. Surveys of transiting giant exoplanets around M-dwarfs (GEMS) […]
Posted inExoplanets, -moons, -comets
Two Extremely Irradiated Volatile-rich Sub-Neptunes With Companions In The TOI-426 And TOI-1839 Systems: Insights Into Arrival And Survival Near The Lower Edge Of The Neptunian Desert
[astro-ph.EP] Using TESS photometry and 147 HARPS radial velocities, we confirm two extremely irradiated, volatile-rich sub-Neptunes near the lower edge of the Neptunian desert: TOI-426 b and TOI-1839 b, orbiting […]
![Zoomed-in 12CO J = 3 − 2 channel maps. Contours are 3, 6 and 10σ. The isovelocity contours are calculated with a flat surface. The planet locations are marked with white dots. The beam is given in the bottom right corner while the velocity of the channel is provided in the bottom left corner. Fig. F.5 shows the channel maps over the full extent of the disk.-- [astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/09/Mapping.png?resize=1200%2C717&ssl=1)
Posted inExoplanets, -moons, -comets
Mapping the WISPIT2 Planet-Hosting Cavity at Sub-Hill-Radius scales
[astro-ph.EP] We present new deep, very high angular resolution observations of the sub-mm continuum (19×13 mas) and 12CO (67×52 mas) emission from the disk surrounding the planet host WISPIT2. Our […]
Posted inAtmospheres, Climate, Weather
Contrasting C/O Ratios in Uranus and Neptune From Disequilibrium Chemistry: A Clue To Distinct Evolutionary Pathways?
[astro-ph.EP] The formation of Uranus and Neptune remains poorly constrained largely due to uncertain deep elemental abundances. Carbon monoxide (CO), a disequilibrium species in the upper troposphere, provides an indirect […]
Posted inMars
Stability Of Uracil In Different Sulphates Under Martian-like UV Irradiation
[Icarus] Mars is one of the most probable and accessible places where life could have evolved beyond Earth.
Posted inSETI & Technosignatures
Identifying Casual SETI Transmissions And Ultra-Faint RFI With Cumulant Imaging
[astro-ph.IM] Techniques for identifying radio beacons transmitted by extra-terrestrial civilizations are well advanced.
Posted inUncategorized
Multi-Wavelength Post-Perihelion Polarimetry of Interstellar Comet 3I/ATLAS
[astro-ph.EP] We present new post-perihelion polarimetric observations of the third discovered interstellar object, 3I/ATLAS (C/2025 N1; hereafter 3I), obtained using FORS2 at the Very Large Telescope, ALFOSC at the Nordic […]
![Conceptual diagrams of the three experimental setups used to produce the tholin samples measured in this study: (a) UNI/PAC, (b) JHU/PHAZER, (c) ARC/COSmIC featuring a diagram of the pulsed discharge nozzle adapted from Sciamma-O’Brien et al. (2014).-- [astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/09/A-Cross.png?resize=1200%2C634&ssl=1)
Posted inTitan
A Cross-Laboratory Comparison Study of Titan Haze Analogs: Surface Energy II
[astro-ph.EP] The organic haze particles on Titan play important roles in atmospheric cloud formation and aerosol-lake interactions.
![[TOP] Marginal posterior probability distribution functions of the Bayesian fit to Eq. 1 when [X/H] is the mean abundance of iron-peak elements (left), volatile elements (middle), and α elements (right). The vertical line indicates the mean of the distribution. [BOTTOM] Same as above but considering only the stars with a spectral type earlier than F5. -- [astro-ph.EP]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/09/Signatures.png?resize=1200%2C718&ssl=1)
Posted inExoplanets, -moons, -comets
Signatures Of Rocky Debris Accretion In AF-Type Planet Hosts
[astro-ph.EP] The gas-giant planet-metallicity correlation plays a fundamental role in our understanding of planet formation.