Context. Planetary mass and radius data are showing a wide variety in densities of low-mass exoplanets. This includes sub-Neptunes, whose low densities can be explained with the presence of a […]
TRAPPIST-1
Posted inTRAPPIST-1
Phase Modeling of the TRAPPIST-1 Planetary Atmospheres
Transiting compact multi-planet systems provide many unique opportunities to characterize the planets, including studies of size distributions, mean densities, orbital dynamics, and atmospheric compositions. The relatively short orbital periods in […]
Posted inTRAPPIST-1
The Effect Of Land Albedo On The Climate Of Land-Dominated Planets In The TRAPPIST-1 System
Variations in the reflective properties of the bulk material that comprises the surface of land-dominated planets will affect the planetary energy balance by interacting differently with incident radiation from the […]
Posted inAstrogeology, Exoplanets, -moons, -comets, Press Release, TRAPPIST-1
Can A Multi-layer Planet Be Approximated As A Homogeneous Planet?
With the discovery of TRAPPIST-1 and its seven planets within 0.06 au, the correct treatment of tidal interactions is becoming necessary. The eccentricity, rotation, and obliquity of the planets of […]
Posted inPress Release, TRAPPIST-1
Refining The Transit Timing And Photometric Analysis Of TRAPPIST-1: Masses, Radii, Densities, Dynamics, And Ephemerides
We have collected transit times for the TRAPPIST-1 system with the Spitzer Space Telescope over four years. We add to these ground-based, HST and K2 transit time measurements, and revisit […]
Posted inPress Release, TRAPPIST-1
Surface And Oceanic Habitability Of Trappist-1 Planets Under The Impact Of Flares
The discovery of potentially habitable planets around the ultracool dwarf star Trappist-1 naturally poses the question: could Trappist-1 planets be home to life? These planets orbit very close to the […]
Posted inPress Release, TRAPPIST-1
A Surprising Number Of Exoplanets Could Host Life
Our solar system has one habitable planet — Earth. A new study shows other stars could have as many as seven Earth-like planets in the absence of a gas giant […]
Posted inPress Release, TRAPPIST-1
Predicting the Long-term Stability of Compact Multiplanet Systems
We combine analytical understanding of resonant dynamics in two-planet systems with machine learning techniques to train a model capable of robustly classifying stability in compact multi-planet systems over long timescales […]
Posted inPress Release, TRAPPIST-1
Water Transport Throughout The TRAPPIST-1 System: The Role Of Planetesimals
Observational data suggest that a belt of planetesimals is expected close to the snow line in protoplanetary disks. Assuming there is such a belt in TRAPPIST-1 system, we examine possibilities […]
Posted inPress Release, TRAPPIST-1
A Review Of Possible Planetary Atmospheres In The TRAPPIST-1 System
TRAPPIST-1 is a fantastic nearby (~39.14 light years) planetary system made of at least seven transiting terrestrial-size, terrestrial-mass planets all receiving a moderate amount of irradiation. To date, this is […]