274 citations · 3.1k across the 50 of their papers we have counts for
54 papers
Robustness of C/O and mean molecular weight under disequilibrium chemistry
Bethany Burt, Kevin Heng, Alex Cridland +1
Transmission spectroscopy increasingly reduces exoplanet spectra to derived compositional metrics, such as C/O, O/H, and mean molecular weight (MMW), but these quantities do not ca…
Dynamically Coupled Three-dimensional Cloud-Chemistry in Rapidly Rotating Irradiated Atmospheres: an Application to the Compact White Dwarf-Brown Dwarf system ZTFJ0038+2030
Yanhong Lai, Xianyu Tan, Daphne Broski-Laing +7
Clouds and disequilibrium chemistry shape the observable properties of substellar and planetary atmospheres, and JWST time-resolved spectroscopy now enables direct tests of their t…
Accelerating Chemical Kinetics for Exoplanet Atmospheres using Neural Networks
Isaac Malsky, Xi Zhang, Tiffany Kataria +5
Observations increasingly reveal the coupled radiative, chemical, and dynamical processes that shape exoplanet atmospheres. Interpreting these atmospheres requires models that can…
Sulfur photochemistry observationally traces mantle redox states of rocky planets
Ioannis Panagiotou, Tim Lichtenberg, Shang-Min Tsai +1
Volatile outgassing from planetary interiors controls the composition of rocky exoplanets' secondary atmospheres. However, observations indicate that disequilibrium processes, such…
Phase-dependent chemistry of WASP-43 b revealed with a suite of one-, two-, and three-dimensional models
Robin Baeyens, Julianne I. Moses, Jasmina Blecic +17
Our goal is to investigate the chemistry of the hot Jupiter WASP-43 b in detail using theoretical models, considering the constraints of the James Webb Space Telescope MIRI phase c…
Geodynamics of super-Earth GJ 486b
Tobias G. Meier, Dan J. Bower, Tim Lichtenberg +8
Many super-Earths are on very short orbits around their host star and, therefore, more likely to be tidally locked. Because this locking can lead to a strong contrast between the d…
Phase-resolving the absorption signatures of water and carbon monoxide in the atmosphere of the ultra-hot Jupiter WASP-121b with GEMINI-S/IGRINS
Joost P. Wardenier, Vivien Parmentier, Michael R. Line +12
Ultra-hot Jupiters are among the best targets for atmospheric characterization at high spectral resolution. Resolving their transmission spectra as a function of orbital phase offe…
Inhomogeneous terminators on the exoplanet WASP-39 b
Néstor Espinoza, Maria E. Steinrueck, James Kirk +40
Transmission spectroscopy has been a workhorse technique over the past two decades to constrain the physical and chemical properties of exoplanet atmospheres. One of its classical…
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…
Probing Cold-to-Temperate Exoplanetary Atmospheres: The Role of Water Condensation on Surface Identification with JWST
Ziyu Huang, Xinting Yu, Shang-Min Tsai +5
Understanding the surface temperature and interior structure of cold-to-temperate sub-Neptunes is critical for assessing their habitability, yet direct observations are challenging…
A new lever on exoplanetary B fields: measuring heavy ion velocities
Arjun B. Savel, Hayley Beltz, Thaddeus D. Komacek +2
Magnetic fields connect an array of planetary processes, from atmospheric escape to interior convection. Despite their importance, exoplanet magnetic fields are largely unconstrain…
Simultaneous retrieval of orbital phase resolved JWST/MIRI emission spectra of the hot Jupiter WASP-43b: evidence of water, ammonia and carbon monoxide
Jingxuan Yang, Mark Hammond, Anjali A. A. Piette +14
Spectroscopic phase curves of hot Jupiters measure their emission spectra at multiple orbital phases, thus enabling detailed characterisation of their atmospheres. Precise constrai…
Debris Disks can Contaminate Mid-Infrared Exoplanet Spectra: Evidence for a Circumstellar Debris Disk around Exoplanet Host WASP-39
Laura Flagg, Alycia J. Weinberger, Taylor J. Bell +21
The signal from a transiting planet can be diluted by astrophysical contamination. In the case of circumstellar debris disks, this contamination could start in the mid-infrared and…
Biogenic sulfur gases as biosignatures on temperate sub-Neptune waterworlds
Shang-Min Tsai, Hamish Innes, Nicholas F. Wogan +1
Theoretical predictions and observational data indicate a class of sub-Neptune exoplanets may have water-rich interiors covered by hydrogen-dominated atmospheres. Provided suitable…
JWST observations of K2-18b can be explained by a gas-rich mini-Neptune with no habitable surface
Nicholas F. Wogan, Natasha E. Batalha, Kevin Zahnle +3
JWST recently measured the transmission spectrum of K2-18b, a habitable-zone sub-Neptune exoplanet, detecting CH and CO in its atmosphere. The discovery paper argued the da…
Dynamically coupled kinetic chemistry in brown dwarf atmospheres -- II. Cloud and chemistry connections in directly imaged sub-Jupiter exoplanets
Elspeth K. H. Lee, Xianyu Tan, Shang-Min Tsai
With JWST slated to gain high fidelity time dependent data on brown dwarf atmospheres, it is highly anticipated to do the same for directly imaged, sub-Jupiter exoplanets. With thi…
Global Chemical Transport on Hot Jupiters: Insights from 2D VULCAN photochemical model
Shang-Min Tsai, Vivien Parmentier, João M. Mendonça +7
The atmospheric dynamics of tidally-locked hot Jupiters is characterized by strong equatorial winds. Understanding the interaction between global circulation and chemistry is cruci…
Dynamically coupled kinetic chemistry in brown dwarf atmospheres I. Performing global scale kinetic modelling
Elspeth K. H. Lee, Xianyu Tan, Shang-Min Tsai
The atmospheres of brown dwarfs have been long observed to exhibit a multitude of non-equilibrium chemical signatures and spectral variability across the L, T and Y spectral types.…
Day-night transport induced chemistry and clouds on WASP-39b I: Gas-phase composition
Shang-Min Tsai, Julianne I. Moses, Diana Powell +1
JWST has recently detected the first robust photochemical product on an exoplanet: sulfur dioxide (SO) on WASP-39b (Rustamkulov et al. 2023; Alderson et al. 2023; Tsai et al. 2…
The Runaway Greenhouse Effect on Hycean Worlds
Hamish Innes, Shang-Min Tsai, Raymond T. Pierrehumbert
Hycean worlds are a proposed subset of sub-Neptune exoplanets with substantial water inventories, liquid surface oceans and extended hydrogen-dominated atmospheres that could be fa…
High atmospheric metal enrichment for a Saturn-mass planet
Jacob L. Bean, Qiao Xue, Prune C. August +9
Atmospheric metal enrichment (i.e., elements heavier than helium, also called "metallicity") is a key diagnostic of the formation of giant planets. The giant planets of the solar s…
A Mini-Chemical Scheme with Net Reactions for 3D GCMs II. 3D thermochemical modelling of WASP-39b and HD 189733b
Elspeth K. H. Lee, Shang-Min Tsai, Mark Hammond +1
The chemical inventory of hot Jupiter (HJ) exoplanets atmospheres continue to be observed by various ground and space based instruments in increasing detail and precision. It is ex…
A broadband thermal emission spectrum of the ultra-hot Jupiter WASP-18b
Louis-Philippe Coulombe, Björn Benneke, Ryan Challener +73
Close-in giant exoplanets with temperatures greater than 2,000 K (''ultra-hot Jupiters'') have been the subject of extensive efforts to determine their atmospheric properties using…
Early Release Science of the exoplanet WASP-39b with JWST NIRCam
Eva-Maria Ahrer, Kevin B. Stevenson, Megan Mansfield +96
Measuring the metallicity and carbon-to-oxygen (C/O) ratio in exoplanet atmospheres is a fundamental step towards constraining the dominant chemical processes at work and, if in eq…