TRAPPIST-1 is an ultra-cool dwarf hosting a system consisting of seven planets. While orbital properties, radii and masses of the planets are nowadays well constrained, one of the open fascinating […]
TRAPPIST-1
Posted inPress Release, TRAPPIST-1
Fundamental Limits From Chaos On Instability Time Predictions In Compact Planetary Systems
Instabilities in compact planetary systems are generically driven by chaotic dynamics. This implies that an instability time measured through direct N-body integration is not exact, but rather represents a single […]
Posted inPress Release, TRAPPIST-1
Detectability of Molecular Signatures on TRAPPIST-1e through Transmission Spectroscopy Simulated for Future Space-Based Observatories
As discoveries of terrestrial, Earth-sized exoplanets that lie within the habitable zone of their host stars continue to occur at increasing rates, efforts have began to shift from the detection […]
Posted inPress Release, TRAPPIST-1
Do the TRAPPIST-1 Planets Have Hydrogen-rich Atmospheres?
Recently, transmission spectroscopy in the atmospheres of the TRAPPIST-1 planets revealed flat and featureless absorption spectra, which rule out cloud-free hydrogen-dominated atmospheres. Earth-sized planets orbiting TRAPPIST-1 likely have either a […]
Posted inPress Release, TRAPPIST-1
A Mirage Of The Cosmic Shoreline: Venus-like Clouds As A Statistical False Positive For Exoplanet Atmospheric Erosion
Near-term studies of Venus-like atmospheres with JWST promise to advance our knowledge of terrestrial planet evolution. However, the remote study of Venus in the Solar System and the ongoing efforts […]
Posted inPress Release, TRAPPIST-1
Impact of Clouds and Hazes on the Simulated JWST Transmission Spectra of Habitable Zone Planets in the TRAPPIST-1 System
The TRAPPIST-1 system, consisting of an ultra-cool host star having seven known Earth-size planets will be a prime target for atmospheric characterization with JWST. However, the detectability of atmospheric molecular […]
Posted inPress Release, TRAPPIST-1
Revised Mass-radius Relationships For Water-rich Terrestrial Planets Beyond The Runaway Greenhouse Limit
Mass-radius relationships for water-rich terrestrial planets are usually calculated assuming most water is present in condensed (either liquid or solid) form. Planet density estimates are then compared to these mass-radius […]
Posted inPress Release, TRAPPIST-1
Searching For A Cometary Belt Around Trappist-1 With ALMA
Low mass stars might offer today the best opportunities to detect and characterise planetary systems, especially those harbouring close-in low mass temperate planets. Among those stars, Trappist-1 is exceptional since […]
Posted inPress Release, TRAPPIST-1
James Webb Space Telescope Will Study TRAPPIST-1 Planet Atmospheres
The study, led by Jacob Lustig-Yaeger, a UW doctoral student in astronomy, finds that the James Webb telescope, set to launch in 2021, might be able to learn key information […]
Posted inTRAPPIST-1
The Chaotic Nature of TRAPPIST-1 Planetary Spin States
The TRAPPIST-1 system has 7 known terrestrial planets arranged compactly in a mean-motion resonant chain around an ultra-cool central star, some within the estimated habitable zone. Given their short orbital […]