5 papers
Organosulfur Chemistry on sub-Neptunes: Implications for hazes and biosignatures
Sean Jordan, Shang-Min Tsai, Paul B. Rimmer +1
The organosulfur biosignature gases dimethylsulfide (DMS) and dimethlydisulfide (DMDS) have recently been claimed to be present in the atmosphere of sub-Neptune exoplanet K2-18b, l…
Three outstanding physical questions for K2-18 b and other temperate sub-Neptunes
Shang-Min Tsai, Piero Ferrari, Mats Kuipers +7
Recent transmission spectra of the temperate sub-Neptune K2-18 b obtained with JWST have attracted significant attention. Debates have quickly arisen over the interpretation of the…
Planetary albedo is limited by the above-cloud atmosphere: Implications for sub-Neptune climate
Sean Jordan, Oliver Shorttle, Sascha P. Quanz
Energy limits that delineate the `habitable zone' for exoplanets depend on a given exoplanet's net planetary albedo (or `Bond albedo'). We here demonstrate that the planetary albed…
Abiotic Ozone in the Observable Atmospheres of Venus and Venus-like Exoplanets
Robb Calder, Oliver Shorttle, Sean Jordan +2
Ozone is a potential biosignature and disambuguator between Earth-like and Venus-like exoplanets due to its association on Earth with photosynthetically produced oxygen (O). Ho…
Tracing the Inner Edge of the Habitable Zone with Sulfur Chemistry
Sean Jordan, Oliver Shorttle, Paul B. Rimmer
The circumstellar liquid-water habitable zone guides our search for potentially inhabited exoplanets, but remains observationally untested. We show that the inner edge of the habit…