Results 241 to 250 of about 2,690,574 (274)

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
openaire   +3 more sources

Spin-Orbital Evolution of Exoplanets [PDF]

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
openaire   +1 more source

Evolution of Angular Momentum Distribution in Exoplanet Systems [PDF]

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
openaire   +1 more source

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 ...
openaire   +2 more sources

Rotational evolution of exoplanets under the action of gravitational and magnetic perturbations

Celestial Mechanics and Dynamical Astronomy, 2008
We investigate the evolution of the rotational axes of exoplanets under the action of gravitational and magnetic perturbations. The planet is assumed to be dynamically symmetrical and to be magnetised along its dynamical-symmetry axis. By qualitative methods of the bifurcation theory of multiparametric PDEs, we have derived a gallery of 69 phase ...
Kitiashvili I., Gusev A.
openaire   +4 more sources

A radiogenic heating evolution model for cosmochemically Earth-like exoplanets

Icarus, 2014
Abstract Discoveries of rocky worlds around other stars have inspired diverse geophysical models of their plausible structures and tectonic regimes. Severe limitations of observable properties require many inexact assumptions about key geophysical characteristics of these planets.
Stephen J. Mojzsis, Stephen J. Mojzsis, Stephen J. Mojzsis, Bradley S. Meyer, Elizabeth A. Frank   +4 more
openaire   +3 more sources

A giant impact as the likely origin of different twins in the Kepler-107 exoplanet system

Nature Astronomy, 2019
Measures of exoplanet bulk densities indicate that small exoplanets with radius less than 3 Earth radii (R⊕) range from low-density sub-Neptunes containing volatile elements1 to higher-density rocky planets with Earth-like2 or iron-rich3 (Mercury-like ...
A. Bonomo, L. Zeng, M. Damasso, Z. Leinhardt, A. B. Justesen, E. Lopez, M. Lund, L. Malavolta, V. Silva Aguirre, L. Buchhave, E. Corsaro, Thomas R Denman, M. López-Morales, S. Mills, A. Mortier, K. Rice, A. Sozzetti, A. Vanderburg, L. Affer, T. Arentoft, M. Benbakoura, F. Bouchy, J. Christensen-Dalsgaard, A. Collier Cameron, R. Cosentino, C. Dressing, X. Dumusque, P. Figueira, A. Fiorenzano, R. García, R. Handberg, A. Harutyunyan, J. Johnson, H. Kjeldsen, D. Latham, C. Lovis, M. Lundkvist, S. Mathur, M. Mayor, G. Micela, E. Molinari, F. Motalebi, V. Nascimbeni, C. Nava, F. Pepe, D. Phillips, G. Piotto, E. Poretti, D. Sasselov, D. Ségransan, S. Udry, C. Watson   +51 more
semanticscholar   +1 more source

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
openaire   +1 more source

The effect of galactic chemical evolution on terrestrial exoplanet composition and tectonics

, 2020
C. O'Neill, J. Lowman, Jonathon Wasiliev
semanticscholar   +1 more source

Tectonothermal evolution of solid bodies: terrestrial planets, exoplanets and moons

Australian Journal of Earth Sciences, 2012
A framework for understanding the tectonothermal evolution of solid planetary bodies has historically been lacking owing to sparse observational constraints. Developments in simulating the physical interiors and tectonic behaviour of terrestrial planets have allowed insights into the relevant physics and important factors governing planetary behaviour.
openaire   +3 more sources