262 citations · 583 across the 16 of their papers we have counts for
16 papers · 1 filter
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…
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…
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…
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…
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…
Sulphur dioxide in the mid-infrared transmission spectrum of WASP-39b
Diana Powell, Adina D. Feinstein, Elspeth K. H. Lee +70
The recent inference of sulphur dioxide (SO) in the atmosphere of the hot (1100 K), Saturn-mass exoplanet WASP-39b from near-infrared JWST observations suggests that phot…
Distinguishing oceans of water from magma on mini-Neptune K2-18b
Oliver Shorttle, Sean Jordan, Harrison Nicholls +2
Mildly irradiated mini-Neptunes have densities potentially consistent with them hosting substantial liquid water oceans (`Hycean' planets). The presence of CO2 and simultaneous abs…
Atmospheres as a Window to Rocky Exoplanet Surfaces
Xander Byrne, Oliver Shorttle, Sean Jordan +1
As the characterization of exoplanet atmospheres proceeds, providing insights into atmospheric chemistry and composition, a key question is how much deeper into the planet we might…
A mineralogical reason why all exoplanets cannot be equally oxidising
Claire Marie Guimond, Oliver Shorttle, Sean Jordan +1
From core to atmosphere, the oxidation states of elements in a planet shape its character. Oxygen fugacity (fO) is one parameter indicating these likely oxidation states. The o…
Large Interferometer For Exoplanets (LIFE): IX. Assessing the Impact of Clouds on Atmospheric Retrievals at Mid-Infrared Wavelengths with a Venus-Twin Exoplanet
B. S. Konrad, E. Alei, S. P. Quanz +10
The Large Interferometer For Exoplanets (LIFE) initiative aims to develop a space based mid-infrared (MIR) nulling interferometer to measure the thermal emission spectra of tempera…
Photochemically-produced SO in the atmosphere of WASP-39b
Shang-Min Tsai, Elspeth K. H. Lee, Diana Powell +82
Photochemistry is a fundamental process of planetary atmospheres that regulates the atmospheric composition and stability. However, no unambiguous photochemical products have been…
Growth and Evolution of Secondary Volcanic Atmospheres: II. The Importance of Kinetics
Philippa Liggins, Sean Jordan, Paul B. Rimmer +1
Volcanism is a major and long-term source of volatile elements such as C and H to Earth's atmosphere, likely has been to Venus's atmosphere, and may be for exoplanets. Models simul…
Proposed energy-metabolisms cannot explain the atmospheric chemistry of Venus
Sean Jordan, Oliver Shorttle, Paul B. Rimmer
Life in the clouds of Venus, if present in sufficiently high abundance, must be affecting the atmospheric chemistry. It has been proposed that abundant Venusian life could obtain e…
Growth and evolution of secondary volcanic atmospheres: I. Identifying the geological character of hot rocky planets
Philippa Liggins, Sean Jordan, Paul B. Rimmer +1
The geology of Earth and super-Earth sized planets will, in many cases, only be observable via their atmospheres. Here, we investigate secondary volcanic atmospheres as a key base…
Photochemistry of Venus-Like Planets Orbiting K- and M-Dwarf Stars
Sean Jordan, Paul B. Rimmer, Oliver Shorttle +1
Compared to the diversity seen in exoplanets, Venus is a veritable astrophysical twin of the Earth, however its global cloud layer truncates features in transmission spectroscopy,…
Hydroxide salts in the clouds of Venus: their effect on the sulfur cycle and cloud droplet pH
Paul B. Rimmer, Sean Jordan, Tereza Constantinou +4
The depletion of SO and HO in and above the clouds of Venus (45 -- 65 km) cannot be explained by known gas-phase chemistry and the observed composition of the atmosphere. W…