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An upper limit on late accretion and water delivery in the Trappist-1 exoplanet system
Sean N. Raymond, Andre Izidoro, Emeline Bolmont +9
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…
How does the background atmosphere affect the onset of the runaway greenhouse ?
G. Chaverot, M. Turbet, E. Bolmont +1
As the insolation of an Earth-like (exo)planet with a large amount of water increases, its surface and atmospheric temperatures also increase, eventually leading to a catastrophic…
Day-night cloud asymmetry prevents early oceans on Venus but not on Earth
Martin Turbet, Emeline Bolmont, Guillaume Chaverot +3
Earth has had oceans for nearly four billion years and Mars had lakes and rivers 3.5-3.8 billion years ago. However, it is still unknown whether water has ever condensed on the sur…
The TRAPPIST-1 Habitable Atmosphere Intercomparison (THAI). Part III: Simulated Observables -- The return of the spectrum
Thomas J. Fauchez, Geronimo L. Villanueva, Denis E. Sergeev +11
The TRAPPIST-1 Habitable Atmosphere Intercomparison (THAI) is a community project that aims to quantify how dfferences in general circulation models (GCMs) could impact the climate…
The TRAPPIST-1 Habitable Atmosphere Intercomparison (THAI). Part II: Moist Cases -- The Two Waterworlds
Denis E. Sergeev, Thomas J. Fauchez, Martin Turbet +11
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 genera…
The TRAPPIST-1 Habitable Atmosphere Intercomparison (THAI). Part I: Dry Cases -- The fellowship of the GCMs
Martin Turbet, Thomas J. Fauchez, Denis E. Sergeev +12
With the commissioning of powerful, new-generation telescopes such as the James Webb Space Telescope (JWST) and the ground-based Extremely Large Telescopes, the first characterizat…
Main ways in which stars influence the climate and surface habitability of their planets
Martin Turbet, Franck Selsis
We present a brief overview of the main effects by which a star will have an impact (positive or negative) on the surface habitability of planets in orbit around it. Specifically,…
3D convection-resolving model of temperate, tidally-locked exoplanets
Maxence Lefèvre, Martin Turbet, Raymond Pierrehumbert
A large fraction of known terrestrial-size exoplanets located in the Habitable Zone of M-dwarfs are expected to be tidally-locked. Numerous efforts have been conducted to study the…
TRAPPIST Habitable Atmosphere Intercomparison (THAI) workshop report
Thomas J. Fauchez, Martin Turbet, Denis E. Sergeev +31
The era of atmospheric characterization of terrestrial exoplanets is just around the corner. Modeling prior to observations is crucial in order to predict the observational challen…
3-D Global modelling of the early martian climate under a dense CO2+H2 atmosphere and for a wide range of surface water inventories
Martin Turbet, François Forget
CO2+H2 greenhouse warming has recently emerged as a promising scenario to sufficiently warm the early martian surface to allow the formation of valley networks and lakes. Here we p…
Possible Atmospheric Diversity of Low Mass Exoplanets, some Central Aspects
John Lee Grenfell, Jeremy Leconte, François Forget +9
Exoplanetary science continues to excite and surprise with its rich diversity. We discuss here some key aspects potentially influencing the range of exoplanetary terrestrial-type a…