Exoplanet interiors and habitability

  title={Exoplanet interiors and habitability},
  author={Tim Van Hoolst and Lena Noack and Attilio Rivoldini},
  journal={Advances in Physics: X},
ABSTRACT More than 1000 exoplanets with a radius smaller than twice that of the Earth are currently known, mainly thanks to space missions dedicated to the search of exoplanets. Mass and radius estimates, which are only available for a fraction ( 10%) of the exoplanets, provide an indication of the bulk composition and interior structure and show that the diversity in exoplanets is far greater than in the Solar System. Geophysical studies of the interior of exoplanets are key to understanding… 
On the Structure and Long-term Evolution of Ice-rich Bodies
The interest in the structure of ice-rich planetary bodies, in particular the differentiation between ice and rock, has grown due to the discovery of Kuiper Belt objects and exoplanets. We thus carry
Growth and evolution of secondary volcanic atmospheres: I. Identifying the geological character of warm rocky planets
The geology of Earth and super-Earth sized planets will, in many cases, only be observable via their atmospheres. Here, we use the creation of volcanic atmospheres as a key window into planetary
Ultrahigh-Pressure Magnesium Hydrosilicates as Reservoirs of Water in Early Earth.
The origin of water on the Earth is a long-standing mystery, requiring a comprehensive search for hydrous compounds, stable at conditions of the deep Earth and made of Earth-abundant elements.
Evolution of the Earth's Polar Outflow From Mid‐Archean to Present
The development of habitable conditions on Earth is tightly connected to the evolution of its atmosphere, which is strongly influenced by atmospheric escape. We investigate the evolution of the polar
Mantle redox state drives outgassing chemistry and atmospheric composition of rocky planets
The mantle redox state is central to the chemical composition of atmospheres while factors such as planetary mass, thermal state, and age mainly affect the degassing rate, and it is demonstrated that mantle oxygen fugacity has an effect on atmospheric thickness.
Ultrahigh-pressure disordered eight-coordinated phase of Mg2GeO4: Analogue for super-Earth mantles
Significance This work presents experimental evidence for the formation of a phase with eightfold coordination of germanium by oxygen in Mg2GeO4, a well-known analogue of Mg2SiO4 at extreme pressure


Can we constrain the interior structure of rocky exoplanets from mass and radius measurements
Aims. We present an inversion method based on Bayesian analysis to constrain the interior structure of terrestrial exoplanets, in the form of chemical composition of the mantle and core size.
Interior structure models and fluid Love numbers of exoplanets in the super-Earth regime
Space missions such as CoRoT and Kepler have made the transit method the most successful technique in observing extrasolar planets. However, although the mean density of a planet can be derived from
Tidal heating and the habitability of the TRAPPIST-1 exoplanets
Context. New estimates of the masses and radii of the seven planets orbiting the ultracool M-dwarf TRAPPIST-1 star permit improved modelling of their compositions, heating by tidal dissipation, and
Outgassing on stagnant-lid super-Earths
Aims. We explore volcanic CO2-outgassing on purely rocky, stagnant-lid exoplanets of different interior structures, compositions, thermal states, and age. We focus on planets in the mass range of 1–8
An Earth-sized exoplanet with a Mercury-like composition
Earth, Venus, Mars and some extrasolar terrestrial planets1 have a mass and radius that is consistent with a mass fraction of about 30% metallic core and 70% silicate mantle2. At the inner frontier
Possible climates on terrestrial exoplanets
  • F. Forget, J. Leconte
  • Physics, Geology
    Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
  • 2014
Predicting the actual climate regime on a specific planet will remain challenging because climate systems are affected by strong positive feedbacks and the coupling among temperature, volatile phase changes and radiative properties results in instabilities, such as runaway glaciations and runaway greenhouse effect.
Can the interior structure influence the habitability of a rocky planet