Showing 2018 · astro-ph.EPShow all

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astro-ph.EP2018★ 54 cited

Excitation and depletion of the asteroid belt in the early instability scenario

Matthew S. Clement, Sean N. Raymond, Nathan A. Kaib

Containing only a few percent the mass of the moon, the current asteroid belt is around three to four orders of magnitude smaller that its primordial mass inferred from disk models…

astro-ph.EP2018★ 61 cited

An optical transmission spectrum of the ultra-hot Jupiter WASP-33b. First indication of AlO in an exoplanet

C. von Essen, M. Mallonn, L. Welbanks +4

There has been increasing progress toward detailed characterization of exoplanetary atmospheres, in both observations and theoretical methods. Improvements in observational facilit…

astro-ph.EP2018★ 56 cited

Global climate modeling of Saturn's atmosphere. Part II: multi-annual high-resolution dynamical simulations

Aymeric Spiga, Sandrine Guerlet, Ehouarn Millour +9

The Cassini mission unveiled the intense and diverse activity in Saturn's atmosphere: banded jets, waves, vortices, equatorial oscillations. To set the path towards a better unders…

astro-ph.EP2018★ 15 cited

Can Moons Have Moons?

Juna A. Kollmeier, Sean N. Raymond

Each of the giant planets within the Solar System has large moons but none of these moons have their own moons (which we call ). By analogy with studies of moons ar…

astro-ph.EP2018★ 48 cited

Modeling the albedo of Earth-like magma ocean planets with H2O-CO2 atmospheres

William Pluriel, Emmanuel Marcq, Martin Turbet

During accretion, the young rocky planets are so hot that they become endowed with a magma ocean. From that moment, the mantle convective thermal flux control the cooling of the pl…

astro-ph.EP2018★ 19 cited

Continuous reorientation of synchronous terrestrial planets controlled by mantle convection

Jérémy Leconte

A large fraction of known rocky exoplanets are expected to have been spun-down to a state of synchronous rotation, including temperate ones. Studies about the atmospheric and surfa…

astro-ph.EP2018★ 103 cited

Temperature, Mass and Turbulence: A Spatially Resolved Multi-Band Non-LTE Analysis of CS in TW~Hya

Richard Teague, Thomas Henning, Stephane Guilloteau +6

Observations of multiple rotational transitions from a single molecule allow for unparalleled constraints on the physical conditions of the emitting region. We present an analysis…

astro-ph.EP2018★ 51 cited

Evolution of Earth-like extrasolar planetary atmospheres: Assessing the atmospheres and biospheres of early Earth analog planets with a coupled atmosphere biogeochemical model

S. Gebauer, J. L. Grenfell, J. W. Stock +4

Understanding the evolution of Earth and potentially habitable Earth-like worlds is essential to fathom our origin in the Universe. The search for Earth-like planets in the habitab…

astro-ph.EP2018★ 47 cited

The 0.8-4.5m broadband transmission spectra of TRAPPIST-1 planets

E. Ducrot, M. Sestovic, B. M. Morris +18

The TRAPPIST-1 planetary system represents an exceptional opportunity for the atmospheric characterization of temperate terrestrial exoplanets with the upcoming James Webb Space Te…

astro-ph.EP2018★ 15 cited

Vortex survival in 3D self-gravitating accretion discs

Min-Kai Lin, Arnaud Pierens

Large-scale, dust-trapping vortices may account for observations of asymmetric protoplanetary discs. Disc vortices are also potential sites for accelerated planetesimal formation b…

astro-ph.EP2018★ 13 cited

On the evolution of vortices in massive protoplanetary discs

Arnaud Pierens, Min-Kai Lin

It is expected that a pressure bump can be formed at the inner edge of a dead-zone, and where vortices can develop through the Rossby Wave Instability (RWI). It has been suggested…

astro-ph.EP2018★ 106 cited

Migration-driven diversity of super-Earth compositions

Sean N. Raymond, Thibault Boulet, Andre Izidoro +2

A leading model for the origin of super-Earths proposes that planetary embryos migrate inward and pile up on close-in orbits. As large embryos are thought to preferentially form be…

astro-ph.EP2018★ 165 cited

Mars' Growth Stunted by an Early Giant Planet Instability

Matthew S. Clement, Nathan A. Kaib, Sean N. Raymond +1

Many dynamical aspects of the solar system can be explained by the outer planets experiencing a period of orbital instability sometimes called the Nice Model. Though often correlat…

astro-ph.EP2018★ 23 cited

Identifying inflated super-Earths and photo-evaporated cores

Daniel Carrera, Eric B. Ford, Andre Izidoro +3

We present empirical evidence, supported by a planet formation model, to show that the curve approximates the location of the so-called pho…

astro-ph.EP2018★ 20 cited

Orbital alignment of circumbinary planets that form in misaligned circumbinary discs: the case of Kepler-413b

Arnaud Pierens, Richard P. Nelson

Although most of the circumbinary planets detected by the Kepler spacecraft are on orbits that are closely aligned with the binary orbital plane, the systems Kepler-413 and Kepler-…

astro-ph.EP2018★ 24 cited

Formation of Terrestrial Planets

Andre Izidoro, Sean N. Raymond

The past decade has seen major progress in our understanding of terrestrial planet formation. Yet key questions remain. In this review we first address the growth of 100 km-scale p…

astro-ph.EP2018★ 47 cited

Interstellar object 'Oumuamua as an extinct fragment of an ejected cometary planetesimal

Sean N. Raymond, Philip J. Armitage, Dimitri Veras

'Oumuamua was discovered passing through our Solar System on a hyperbolic orbit. It presents an apparent contradiction, with colors similar to those of volatile-rich Solar System b…

astro-ph.EP2018★ 122 cited

The Transiting Exoplanet Community Early Release Science Program for JWST

Jacob L. Bean, Kevin B. Stevenson, Natalie M. Batalha +99

The James Webb Space Telescope (JWST) presents the opportunity to transform our understanding of planets and the origins of life by revealing the atmospheric compositions, structur…

astro-ph.EP2018★ 41 cited

Photochemistry, mixing and transport in Jupiter's stratosphere constrained by Cassini

Vincent Hue, Franck Hersant, Thibault Cavalié +2

We aim at constraining the diffusive and advective transport processes in Jupiter's stratosphere. The IR spectrum recorded by Cassini/CIRS during the Jupiter flyby contains the fin…

astro-ph.EP2018★ 116 cited

The Delivery of Water During Terrestrial Planet Formation

David P. O'Brien, Andre Izidoro, Seth A. Jacobson +2

The planetary building blocks that formed in the terrestrial planet region were likely very dry, yet water is comparatively abundant on Earth. We review the various mechanisms prop…

astro-ph.EP2018★ 2 cited

Formation of terrestrial planets in eccentric and inclined giant planet systems

Sotiris Sotiriadis, Anne-Sophie Libert, Sean N. Raymond

Evidence of mutually inclined planetary orbits has been reported for giant planets these last years. Here we aim to study the impact of eccentric and inclined massive giant planets…

astro-ph.EP2018★ 104 cited

Early 2017 observations of TRAPPIST-1 with

Laetitia Delrez, Michael Gillon, Amaury H. M. J. Triaud +14

The recently detected TRAPPIST-1 planetary system, with its seven planets transiting a nearby ultracool dwarf star, offers the first opportunity to perform comparative exoplanetolo…