Results 151 to 160 of about 1,040 (180)

Spin-Orbital Evolution of Exoplanets

EAS Publications Series, 2003
We investigated the equation describing the evolution of the kinetic momentum vector of planets by the action of gravitational and magnetic interaction. The obtained gallery of portraits of the kinetic momentum evolution illustrates the various regimes of planetary system evolution.
A. Gusev, I. Kitiashvili
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Evolution of the obliquity of an exoplanet: A non-resonant case

Icarus, 2020
Abstract We investigate analytically and numerically the variation of the obliquity (the axial tilt) of a hypothetical exo-Earth. A large number of exoplanets was discovered recently; since not much information is available about the masses and orbits of the stars and planets comprising a planetary exo-system, unlike for the planets of the Solar ...
O.M. Podvigina, P.S. Krasilnikov
exaly   +2 more sources

Formation and Evolution of Exoplanets

2010
Introduction Exoplanet Observations Pinpointing Planets in Circumstellar Disks Planet-Planet Interactions Formation via Disk Instability Core Accretion Model Formation of Terrestrial Planets Brown Dwarfs Exoplanet Chemistry Migration and Multiplicity Effects During Giant Planet formation Planets in mean motion resonance Planet-Planet Gravitational ...
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Pushing the envelope of exoplanet evolution modelling [PDF]

, 2021
Propelled by the discovery of the first exoplanet thirty years ago, the scientific community has rallied and made tremendous strides towards a full understand of the formation and evolution of planetary systems. During this period, over 4, 300 confirmed exoplanets have been detected, and the resulting dataset has driven a revolution by allowing for new
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Effect of Galactic Chemical Evolution on Exoplanet Properties

Astrophysical Journal Letters
Abstract We couple a simplified model for galactic chemical evolution with software that models the condensation of dust in protoplanetary disks and software that models the interior structure of planets, in order to estimate the effects that galactic chemical evolution has on the properties of planets as they form over time.
Jason H. Steffen, Cody Shakespeare, Robert Royer, David Rice, Allona Vazan   +4 more
exaly   +3 more sources

Tidal evolution of close-in exoplanets

2014
The continuous action of tides modify the rotation of close-in planets together with its orbit until an equilibrium situation is reached. It is often believed that synchronous motion is the most probable outcome of the tidal evolution process, since synchronous rotation is observed for the majority of the satellites in the solar system. However, in the
Correia, Alexandre C. M., Boué, Gwenaël, Laskar, Jacques, Rodríguez, A.   +3 more
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Evolution of Angular Momentum Distribution in Exoplanet Systems

Astrophysics, 2015
The distribution of angular momentum is investigated in “star–planet systems, taking due account of stellar evolution effects. Numerical simulation is carried out for 15 systems for which stellar rotation data are available. Consideration of changes in stellar structure is confirmed to be significant for the evolution of momentum distribution.
P. A. Tarakanov, A. S. Artamonov
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The Irradiation-Driven Evolution of Gas-Giant Exoplanets

2022
Nearly thirty years after their initial discovery, we now know of over five thousand extrasolar planets. Intensive efforts have been made to characterize the sizes, masses, orbits, and compositions of these new worlds, and the resulting population challenges our intuition from the Solar System.
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Coupling the Atmospheric and Dynamical Evolution of Close-in Exoplanets

The vast majority of the detected exoplanets orbit in less than a month around their star, in extreme conditions unmet in the Solar System. The demographics of these close-in planets exhibit a striking feature: the lack of Neptune-size worlds on very short orbits, also dubbed the "Neptunian desert", which challenges our understanding of planetary ...
Omar Attia, Vincent Bourrier
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Exoplanet Statistics and Theoretical Implications

Annual Review of Astronomy and Astrophysics, 2021
Subo Dong
exaly