253 citations · 1.8k across the 48 of their papers we have counts for
51 papers
CUTE reveals escaping metals in the upper atmosphere of the ultra-hot Jupiter WASP-189b
A. G. Sreejith, Kevin France, Luca Fossati +12
Ultraviolet observations of Ultra-hot Jupiters (UHJs), exoplanets with temperatures over 2000\,K, provide us with an opportunity to investigate if and how atmospheric escape shapes…
The GAPS programme at TNG. XLV. HI Balmer lines transmission spectroscopy and NLTE atmospheric modelling of the ultra-hot Jupiter KELT-20b/MASCARA-2b
L. Fossati, F. Biassoni, G. M. Cappello +27
We aim at extracting the transmission spectrum of the HI Balmer lines of the ultra-hot Jupiter (UHJ) KELT-20b/MASCARA-2b from observations and to further compare the results with w…
Photochemical hazes dramatically alter temperature structure and atmospheric circulation in 3D simulations of hot Jupiters
Maria E. Steinrueck, Tommi Koskinen, Panayotis Lavvas +5
Photochemical hazes are expected to form in hot Jupiter atmospheres and may explain the strong scattering slopes and muted spectral features observed in the transmission spectra of…
A hydrodynamic study of the escape of metal species and excited hydrogen from the atmosphere of the hot Jupiter WASP-121b
Chenliang Huang, Tommi Koskinen, Panayotis Lavvas +1
In the near-UV and optical transmission spectrum of the hot Jupiter WASP-121b, recent observations have detected strong absorption features of Mg, Fe, Ca, and H, extending outsi…
The Colorado Ultraviolet Transit Experiment (CUTE) Mission Overview
Kevin France, Brian Fleming, Arika Egan +18
Atmospheric escape is a fundamental process that affects the structure, composition, and evolution of many planets. The signatures of escape are detectable on close-in, gaseous exo…
Saturn's atmospheric response to the large influx of ring material inferred from Cassini INMS measurements
Julianne I. Moses, Zarah L. Brown, Tommi T. Koskinen +12
During the Grand Finale stage of the Cassini mission, organic-rich ring material was discovered to be flowing into Saturn's equatorial upper atmosphere at a surprisingly large rate…
The Demographics of Kepler's Earths and super-Earths into the Habitable Zone
Galen J. Bergsten, Ilaria Pascucci, Gijs D. Mulders +2
Understanding the occurrence of Earth-sized planets in the habitable zone of Sun-like stars is essential to the search for Earth analogues. Yet a lack of reliable Kepler detections…
Detection Feasibility of H in Ultra-hot Jupiter Atmospheres
Anastasia Morgan, P. Wilson Cauley, Kevin France +2
Ultra-hot Jupiters (UHJs) have recently been the focus of several atmospheric studies due to their extreme properties. While molecular hydrogen (H) plays a key role in UHJ atmo…
Pterodactyls: A Tool to Uniformly Search and Vet for Young Transiting Planets In TESS Primary Mission Photometry
Rachel B. Fernandes, Gijs D. Mulders, Ilaria Pascucci +8
Kepler's short-period exoplanet population has revealed evolutionary features such as the Radius Valley and the Hot Neptune desert that are likely sculpted by atmospheric loss over…
Mass loss by atmospheric escape from extremely close-in planets
Tommi Koskinen, Panayotis Lavvas, Chenliang Huang +3
We explore atmospheric escape from close-in exoplanets with the highest mass loss rates. First, we locate the transition from stellar X-ray and UV-driven escape to rapid Roche lobe…
High-resolution detection of neutral oxygen and non-LTE effects in the atmosphere of KELT-9b
Francesco Borsa, Luca Fossati, Tommi Koskinen +2
Oxygen is a constituent of many of the most abundant molecules detected in exoplanetary atmospheres and a key ingredient for tracking how and where a planet formed. In particular,…
Science goals and new mission concepts for future exploration of Titan's atmosphere geology and habitability: Titan POlar Scout/orbitEr and In situ lake lander and DrONe explorer (POSEIDON)
Sébastien Rodriguez, Sandrine Vinatier, Daniel Cordier +61
In response to ESA Voyage 2050 announcement of opportunity, we propose an ambitious L-class mission to explore one of the most exciting bodies in the Solar System, Saturn largest m…
Energy deposition in Saturn's equatorial upper atmosphere
J. M. Chadney, T. T. Koskinen, X. Hu +6
We construct Saturn equatorial neutral temperature and density profiles of H, H, He, and CH, between 10 and 1 bar using measurements from Cassini's Ion Neutral Mass…
Non-local thermodynamic equilibrium effects determine the upper atmospheric temperature structure of the ultra-hot Jupiter KELT-9b
L. Fossati, M. E. Young, D. Shulyak +5
Several results indicate that the atmospheric temperature of the ultra-hot Jupiter KELT-9b in the main line formation region is a few thousand degrees higher than predicted by self…
A pole to pole pressure temperature map of Saturn's thermosphere from Cassini Grand Finale data
Zarah Brown, Tommi Koskinen, Ingo Mueller-Wodarg +3
Temperatures of the outer planet thermospheres exceed those predicted by solar heating alone by several hundred degrees. Enough energy is deposited at auroral regions to heat the e…
3D simulations of photochemical hazes in the atmosphere of hot Jupiter HD 189733b
Maria E Steinrueck, Adam P. Showman, Panayotis Lavvas +3
Photochemical hazes have been suggested as candidate for the high-altitude aerosols observed in the transmission spectra of many hot Jupiters. We present 3D simulations of the hot…
Exoplanets and the Sun
J. Y-K. Cho, H. Th. Thrastarson, T. T. Koskinen +4
We review the recent progress in understanding the jet structures on exoplanets as well as on and inside the Sun. The emphasis is on the more robust aspects of observation and nume…
A data-driven approach to constraining the atmospheric temperature structure of KELT-9b
L. Fossati, D. Shulyak, A. G. Sreejith +10
Context. Observationally constraining the atmospheric temperature-pressure (TP) profile of exoplanets is an important step forward for improving planetary atmosphere models, furthe…
The High-Energy Radiation Environment Around a 10 Gyr M Dwarf: Habitable at Last?
Kevin France, Girish Duvvuri, Hilary Egan +20
High levels of X-ray and UV activity on young M dwarfs may drive rapid atmospheric escape on temperate, terrestrial planets orbiting within the liquid water habitable zone. However…
Ultraviolet-Based Science in the Solar System: Advances and Next Steps
Amanda R. Hendrix, Tracy M. Becker, Dennis Bodewits +25
We review the importance of recent UV observations of solar system targets and discuss the need for further measurements, instrumentation and laboratory work in the coming decade.…
The Saturn Ring Skimmer Mission Concept: The next step to explore Saturn's rings, atmosphere, interior, and inner magnetosphere
Matthew S. Tiscareno, Mar Vaquero, Matthew M. Hedman +21
The innovative Saturn Ring Skimmer mission concept enables a wide range of investigations that address fundamental questions about Saturn and its rings, as well as giant planets an…
Titan in Transit: Ultraviolet Occultation Observations Reveal a Complex Atmospheric Structure
Patrick D. Tribbett, Tyler D. Robinson, Tommi T. Koskinen
Transit spectroscopy is a key tool for exoplanet atmospheric characterization. However, transit spectrum observations can be limited by aerosol extinction when gas opacities are we…
Compositional Measurements of Saturn's Upper Atmosphere and Rings from Cassini INMS
J. Serigano, S. M. Hörst, C. He +4
The Cassini spacecraft's last orbits directly sampled Saturn's thermosphere and revealed a much more chemically complex environment than previously believed. Observations from the…
Near-ultraviolet Transmission Spectroscopy of HD 209458b: Evidence of Ionized Iron Beyond the Planetary Roche Lobe
Patricio E. Cubillos, Luca Fossati, Tommi Koskinen +5
The inflated transiting hot Jupiter HD 209458b is one of the best studied objects since the beginning of exoplanet characterization. Transmission observations of this system betwee…