Results 61 to 70 of about 2,143 (179)
Magma Ocean Evolution at Arbitrary Redox State
Journal of Geophysical Research: Planets, Volume 129, Issue 12, December 2024.Abstract Interactions between magma oceans and overlying atmospheres on young rocky planets leads to an evolving feedback of outgassing, greenhouse forcing, and mantle melt fraction. Previous studies have predominantly focused on the solidification of oxidized Earth‐similar planets, but the diversity in mean density and irradiation observed in the low ...
Harrison Nicholls +3 more
wiley +1 more source
Empirical Constraints on Tidal Dissipation in Exoplanet Host Stars
The Astrophysical JournalThe orbits of short-period exoplanets are sculpted by tidal dissipation. However, the mechanisms and associated efficiencies of these tidal interactions are poorly constrained.
Sarah C. Millholland +2 more
doaj +1 more source
Celestial Mechanics and Dynamical Astronomy29 pages, 11 figures To be published in "Celestial Mechanics and Dynamical Astronomy"
Folonier, Hugo +2 more
openaire +3 more sources
A Perfect Tidal Storm: HD 104067 Planetary Architecture Creating an Incandescent World
The Astronomical JournalThe discovery of planetary systems beyond the solar system has revealed a diversity of architectures, most of which differ significantly from our system.
Stephen R. Kane +7 more
doaj +1 more source
Tidal Dissipation in Stratified and Semi-convective Regions of Giant Planets
The Astrophysical Journal, 2023 We study how stably stratified or semi-convective layers alter the tidal dissipation rates associated with the generation of internal waves in planetary interiors.
Christina M. Pontin +2 more
doaj +1 more source
Empirical Constraints on the Oblateness of an Exoplanet
, 2009 We show that the gas giant exoplanet HD 189733b is less oblate than Saturn, based on Spitzer Space Telescope photometry of seven transits. The observable manifestations of oblatenesswould have been slight anomalies during the ingress and egress phases ...
Agol +33 more
core +1 more source
Journal of Geophysical Research: Planets, Volume 129, Issue 7, July 2024.Abstract This paper introduces the new Venus global ionosphere‐thermosphere model (V‐GITM) which incorporates the terrestrial GITM framework with Venus‐specific parameters, ion‐neutral chemistry, and radiative processes in order to simulate some of the observable features regarding the temperatures, composition, and dynamical structure of the Venus ...
Brandon M. Ponder +4 more
wiley +1 more source
Tides Tighten the Hycean Habitable Zone
The Astrophysical Journal LettersHycean planets—exoplanets with substantial water ice layers, deep surface oceans, and hydrogen-rich atmospheres—are thought to be favorable environments for life. Due to a relative paucity of atmospheric greenhouse gases, hycean planets have been thought
Joseph R. Livesey +2 more
doaj +1 more source
On the Survivability and Metamorphism of Tidally Disrupted Giant Planets: the Role of Dense Cores
, 2012 A large population of planetary candidates in short-period orbits have been found through transit searches. Radial velocity surveys have also revealed several Jupiter-mass planets with highly eccentric orbits.
Guillochon, James +3 more
core +1 more source
Constraining stellar tidal quality factors from planet‐induced stellar spin‐up
Astronomische Nachrichten, Volume 345, Issue 5, June 2024.Abstract The dynamical evolution of tight star‐planet systems is influenced by tidal interactions between the star and the planet, as was shown recently. The rate at which spins and orbits in such a system evolve depends on the stellar and planetary tidal dissipation efficiency. Here, we present a method to constrain the modified tidal quality factor Q*
Nikoleta Ilić +3 more
wiley +1 more source