B. Levrard

Publications39
h-index15
Citations5,675
Highly Influential Citations661
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A long-term numerical solution for the insolation quantities of the Earth
We present here a new solution for the astronomical computation of the insolation quantities on Earth spanning from -250 Myr to 250 Myr. This solution has been improved with respect to La93 (Laskar…
Long term evolution and chaotic diffusion of the insolation quantities of Mars
As the obliquity of Mars is strongly chaotic, it is not possible to give a solution for its evolution over more than a few million years. Using the most recent data for the rotational state of Mars,…
Habitable planets around the star Gliese 581
Radial velocity surveys are now able to detect terrestrial planets at habitable distance from M-type stars. Recently, two planets with minimum masses below 10 Earth masses were reported in a triple…
Orbital forcing of the martian polar layered deposits
TLDR
A correlation exists between ice-layer radiance as a function of depth and the insolation variations in summer at the martian north pole, similar to what has been shown for palaeoclimate studies of the Earth.
Is tidal heating sufficient to explain bloated exoplanets? Consistent calculations accounting for finite initial eccentricity
We present the consistent evolution of short-period exoplanets coupling the tidal and gravothermal evolution of the planet. Contrarily to previous similar studies, our calculations are based on the…
Recent ice-rich deposits formed at high latitudes on Mars by sublimation of unstable equatorial ice during low obliquity
TLDR
Using the ice accumulation rates estimated from global climate model simulations, it is shown that, over the past ten million years, large variations of Mars' obliquity have allowed the formation of such metres-thick, sedimentary layered deposits in high latitude and polar regions.
Formation of Glaciers on Mars by Atmospheric Precipitation at High Obliquity
TLDR
High-resolution climate simulations performed with a model designed to simulate the present-day Mars water cycle but assuming a 45° obliquity points to an atmospheric origin for the ice and reveals how precipitation could have formed glaciers on Mars.
Recent formation and evolution of northern Martian polar layered deposits as inferred from a Global Climate Model
[1] We present a time-marching model which simulates the exchange of water ice between the Martian northern cap, the tropics, and a high-latitude surface reservoir. Net annual exchange rates of water…
FALLING TRANSITING EXTRASOLAR GIANT PLANETS
We revisit the tidal stability of extrasolar systems harboring a transiting planet and demonstrate that, independently of any tidal model, none, but one (HAT-P-2b) of these planets has a tidal…
Amazonian northern mid-latitude glaciation on Mars: A proposed climate scenario
Recent geological observations in the northern mid-latitudes of Mars show evidence for past glacial activity during the late Amazonian, similar to the integrated glacial landsystems in the Dry…
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