Results 11 to 20 of about 10,991 (143)

Extension of the creep tide theory to exoplanet systems with high stellar obliquity. The dynamic tide of CoRoT-3b [PDF]

arXiv
This paper extends the creep tide theory to exoplanetary systems with significant obliquities. The extended theory allows us to obtain the stellar and planetary hydrodynamic equilibrium tides and the evolution of the rotational state of the bodies. The dynamic ellipsoidal figure of equilibrium of the body is calculated taking into account that its ...
Folonier, Hugo, Ferraz-Mello, Sylvio, Alves-Silva, Raphael   +2 more
arxiv   +4 more sources

DREAM

Astronomy & Astrophysics, 2023
The spin–orbit angle, or obliquity, is a powerful observational marker that allows us to access the dynamical history of exoplanetary systems. For this study, we have examined the distribution of spin–orbit angles for close-in exoplanets and put it in a statistical context of tidal interactions between planets and their host stars.
M. Attia, V. Bourrier, J.-B. Delisle, P. Eggenberger   +3 more
  +6 more sources

Tides on Other Earths: Implications for Exoplanet and Palaeo‐Tidal Simulations [PDF]

Geophysical Research Letters, 2020
AbstractA key controller of a planet's rotational evolution, and hence habitability, is tidal dissipation, which on Earth is dominated by the ocean tides. Because exoplanet or deep‐time Earth topographies are unknown, a statistical ensemble is used to constrain possible tidal dissipation rates on an Earth‐like planet.
Michael J. Way, Michael J. Way, Michael J. Way, Rory Barnes, J. A. M. Green, B. W. Blackledge   +5 more
openaire   +4 more sources

Atmospheric Circulation of Tide-Locked Exoplanets [PDF]

Annual Review of Fluid Mechanics, 2019
Tide-locked planets are planets in which tidal stresses from the host star have spun down the planet's rotation to the point where its length of sidereal day equals its length of year. In a nearly circular orbit, such planets have a permanent dayside and a permanent nightside, leading to extreme heating contrasts.
Pierrehumbert, R, Hammond, M
openaire   +3 more sources

Tidal Quality of the Hot Jupiter WASP-12b

Universe, 2022
WASP-12b stands out among the planets of its class of hot Jupiters because of the observed fast orbital decay attributed to tidal dissipation. The measured rate of the orbital period change is P⋅orb=−29±3ms/yr= −(9.2±1.0)×10−10s/s.
Michael Efroimsky, Valeri V. Makarov
doaj   +1 more source

Tidal Dissipation Regimes among the Short-period Exoplanets

The Astrophysical Journal Letters, 2023
The efficiency of tidal dissipation provides a zeroth-order link to a planet’s physical properties. For super-Earth and sub-Neptune planets in the range R _⊕ ≲ R _p ≲ 4 R _⊕ , particularly efficient dissipation (i.e., low tidal quality factors) may ...
Emma M. Louden, Gregory P. Laughlin, Sarah C. Millholland   +2 more
doaj   +1 more source

Stability and Detectability of Exomoons Orbiting HIP 41378 f, a Temperate Jovian Planet with an Anomalously Low Apparent Density

The Astronomical Journal, 2023
Moons orbiting exoplanets (“exomoons”) may hold clues about planet formation, migration, and habitability. In this work, we investigate the plausibility of exomoons orbiting the temperate ( T _eq = 294 K) giant ( R = 9.2 R _⊕ ) planet HIP 41378 f, which ...
Caleb K. Harada, Courtney D. Dressing, Munazza K. Alam, James Kirk, Mercedes López-Morales, Kazumasa Ohno, Babatunde Akinsanmi, Susana C. C. Barros, Lars A. Buchhave, A. Collier Cameron, Ian J. M. Crossfield, Fei Dai, Peter Gao, Steven Giacalone, Salomé Grouffal, Jorge Lillo-Box, Andrew W. Mayo, Annelies Mortier, Alexandre Santerne, Nuno C. Santos, Sérgio G. Sousa, Emma V. Turtelboom, Andrew Vanderburg, Peter J. Wheatley   +23 more
doaj   +1 more source

Equatorially trapped Rossby waves in radiative stars

Astronomische Nachrichten, Volume 344, Issue 10, December 2023., 2023
Abstract Observations by recent space missions reported the detection of Rossby waves (r‐modes) in light curves of many stars (mostly A, B, and F spectral types) with outer radiative envelope. This article aims to study the theoretical dynamics of Rossby‐type waves in such stars. Hydrodynamic equations in a rotating frame were split into horizontal and
Mariam Albekioni, Teimuraz V. Zaqarashvili, Vasil Kukhianidze, Eka Gurgenashvili, Philippe Bourdin   +4 more
wiley   +1 more source

Prospects for Cryovolcanic Activity on Cold Ocean Planets

The Astrophysical Journal, 2023
We have estimated total internal heating rates and depths to possible subsurface oceans for 17 planets that may be cold ocean planets, low-mass exoplanets with equilibrium surface temperatures and/or densities that are consistent with icy surfaces and a ...
Lynnae C. Quick, Aki Roberge, Guadalupe Tovar Mendoza, Elisa V. Quintana, Allison A. Youngblood   +4 more
doaj   +1 more source

A Tectonic Manifesto

Perspectives of Earth and Space Scientists, Volume 4, Issue 1, December 2023., 2023
Abstract Tectonics is the scientific discipline that studies the relationship between planetary convection and surface deformation and magmatism. In recent years global tectonic regimes and planetary evolution have become foci of astronomical and planetological research dealing in particular with potential habitability of planets orbiting other stars ...
Robert Stern, Taras Gerya, Paul Tackley
wiley   +1 more source