The Trappist-1 planets provide a unique opportunity to test the current understanding of rocky planet evolution. The James Webb Space Telescope is expected to characterize the atmospheres of these planets, […]
TRAPPIST-1
Posted inTRAPPIST-1
HST/WFC3 Transmission Spectroscopy Of The Cold Rocky Planet TRAPPIST-1h
TRAPPIST-1 is a nearby ultra-cool dwarf star transited by seven rocky planets. We observed three transits of its outermost planet, TRAPPIST-1h, using the G141 grism of the Wide Field Camera […]
Posted inTRAPPIST-1
Settle The TRAPPIST Exoplanets: Challenge For Evolutionary Computing
It reads like a work of science fiction: software that mates, reproduces and mutates being deployed to plan the exploration and settlement of the exotic TRAPPIST-1 solar system, around 40 […]
Posted inTRAPPIST-1
ExoCAM: A 3D Climate Model for Exoplanet Atmospheres
The TRAPPIST-1 Habitable Atmosphere Intercomparison (THAI) project was initiated to compare 3D climate models that are commonly used for predicting theoretical climates of habitable zone extrasolar planets. One of the […]
Posted inTRAPPIST-1
An Upper Limit On Late Accretion And Water Delivery In The Trappist-1 Exoplanet System
The Trappist-1 system contains seven roughly Earth-sized planets locked in a multi-resonant orbital configuration, which has enabled precise measurements of the planets’ masses and constrained their compositions. Here we use […]
Posted inTRAPPIST-1
Orbital Harmony Limits Late Arrival Of Water On TRAPPIST-1 Planets
Seven Earth-sized planets orbit the star TRAPPIST-1 in near-perfect harmony, and U.S. and European researchers have used that harmony to determine how much physical abuse the planets could have withstood […]
Posted inTRAPPIST-1
Detecting The Proposed CH4-CO2 Biosignature Pair With The James Webb Space Telescope: TRAPPIST-1e And The Effect Of Cloud/haze
It is widely anticipated that the James Webb Space Telescope (JWST) will be transformative for exoplanet studies. It has even been suggested that JWST could provide the first opportunity to […]
Posted inTRAPPIST-1
The Dynamics Of The TRAPPIST-1 System In The Context Of Its Formation
TRAPPIST-1 is an 0.09 M⊙ star, which harbours a system of seven Earth-sized planets. Two main features stand out: (i) all planets have similar radii, masses, and compositions; and (ii) […]
Posted inTRAPPIST-1
The TRAPPIST-1 Habitable Atmosphere Intercomparison (THAI). Part I: Dry Cases — The Fellowship Of The GCMs
With the commissioning of powerful, new-generation telescopes such as the JWST and the ELTs, the first characterization of a high molecular weight atmosphere around a temperate rocky exoplanet is imminent. […]
Posted inTRAPPIST-1
The TRAPPIST-1 Habitable Atmosphere Intercomparison (THAI). Part II: Moist Cases — The Two Waterworlds
To identify promising exoplanets for atmospheric characterization and to make the best use of observational data, a thorough understanding of their atmospheres is needed. 3D general circulation models (GCMs) are […]