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Identifying Inflated Super-Earths and Photo-evaporated Cores
(2018-10-20)
We present empirical evidence, supported by a planet formation model, to show that the curve approximates the location of the so-called photo-evaporation valley. Planets below that curve are likely to have experienced ...
Formation of the G-ring arc
(Oxford Univ Press, 2016-09-11)
Since 2004, the images obtained by the Cassini spacecraft's on-board cameras have revealed the existence of several small satellites in the Saturn system. Some of these small satellites are embedded in arcs of particles. ...
Formation of short-period planets by disc migration
(2019-01-01)
Protoplanetary discs are thought to be truncated at orbital periods of around 10 d. Therefore, the origin of rocky short-period planets with P < 10 d is a puzzle. We propose that many of these planets may form through the ...
On the stability of additional moons orbiting Kepler-1625 b
(2022-02-01)
Since it was proposed, the exomoon candidate Kepler-1625 b-I has changed the way we see satellite systems. Because of its unusual physical characteristics, many questions about the stability and origin of this candidate ...
Migration-driven diversity of super-Earth compositions
(2018-01-01)
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 beyond the snowline, this naively predicts ...
THE RINGS of CHARIKLO under CLOSE ENCOUNTERS with the GIANT PLANETS
(2016-06-20)
The Centaur population is composed of minor bodies wandering between the giant planets that frequently perform close gravitational encounters with these planets, leading to a chaotic orbital evolution. Recently, the discovery ...
Long-term evolution and stability of Saturnian small satellites: Aegaeon, Methone, Anthe and Pallene
(2017-09-21)
Aegaeon, Methone, Anthe and Pallene are four Saturnian small moons, discovered by the Cassini spacecraft. Although their orbital characterization has been carried on by a number of authors, their long-term evolution has ...
Building the Galilean moons system via pebble accretion and migration: A primordial resonant chain
(2021-06-01)
The origins of the Galilean satellites - namely Io, Europa, Ganymede, and Callisto - is not fully understood yet. Here we use N-body numerical simulations to study the formation of Galilean satellites in a gaseous ...
Particles Co-orbital to Janus and to Epimetheus: A Firefly Planetary Ring
(2018-01-01)
The Cassini spacecraft found a new and unique ring that shares the trajectory of Janus and Epimetheus, co-orbital satellites of Saturn. Performing image analysis, we found this to be a continuous ring. Its width is between ...
The dynamics of the outer edge of Saturn's A ring perturbed by the satellites Janus and Epimetheus
(2019-07-01)
We present an analytical model to study the dynamics of the outer edge of Saturn's A ring. The latter is influenced by 7:6 mean motion resonances with Janus and Epimetheus. Because of the horseshoe motion of the two ...