Results 11 to 20 of about 2,143 (179)

An Apparently Eccentric Orbit of the Exoplanet WASP-12 b as a Radial Velocity Signature of Planetary-induced Tides in the Host Star [PDF]

The Astrophysical Journal, 2020
Abstract Massive exoplanets on extremely tight orbits, such as WASP-12 b, induce equilibrium tides in their host stars. Following the orbital motion of the planet, the tidal fluid flow in the star can be detected with the radial velocity method.
Gracjan Maciejewski, Andrzej Niedzielski, Eva Villaver, Maciej Konacki, Rafał K. Pawłaszek   +4 more
openaire   +2 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
openaire   +2 more sources

Spin evolution of Earth-sized exoplanets, including atmospheric tides and core–mantle friction [PDF]

International Journal of Astrobiology, 2014
AbstractPlanets with masses between 0.1 and 10 M⊕are believed to host dense atmospheres. These atmospheres can play an important role on the planet's spin evolution, since thermal atmospheric tides, driven by the host star, may counterbalance gravitational tides. In this work, we study the long-term spin evolution of Earth-sized exoplanets.
Cunha, Diana, Correia, Alexandre C.M., Laskar, Jacques   +2 more
openaire   +4 more sources

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

The Ability of Significant Tidal Stress to Initiate Plate Tectonics [PDF]

, 2019
Plate tectonics is a geophysical process currently unique to Earth, has an important role in regulating the Earth's climate, and may be better understood by identifying rocky planets outside our solar system with tectonic activity.
Triaud, Amaury H. M. J., Zanazzi, J. J.
core   +2 more sources

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

Atmospheric Circulation of Tide-Locked Exoplanets

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   +2 more sources

Warm Saturns: On the Nature of Rings around Extrasolar Planets that Reside Inside the Ice Line [PDF]

, 2011
We discuss the nature of rings that may exist around extrasolar planets. Taking the general properties of rings around the gas giants in the Solar System, we infer the likely properties of rings around exoplanets that reside inside the ice line.
Barnes, Barnes, Carter, Carter, Chandrasekhar, Chatterjee, Dunham, Fabrycky, Henon, Henon, Hilke E. Schlichting, Hut, Jackson, Laplace, Lin, Murray, Ohta, Philip Chang, Ragozzine, Roche, Schlichting, Seager, Tremaine, Vieira Neto, Winn, Winn, Wright, Wu, Wu   +28 more
core   +2 more sources

Tides and angular momentum redistribution inside low-mass stars hosting planets: a first dynamical model [PDF]

, 2016
We introduce a general mathematical framework to model the internal transport of angular momentum in a star hosting a close-in planetary/stellar companion. By assuming that the tidal and rotational distortions are small and that the deposit/extraction of
Lanza, A. F., Mathis, S.
core   +2 more sources

Tidally Heated Terrestrial Exoplanets: Viscoelastic Response Models [PDF]

, 2009
Tidal friction in exoplanet systems, driven by orbits that allow for durable nonzero eccentricities at short heliocentric periods, can generate internal heating far in excess of the conditions observed in our own solar system.
Bland, Bodenheimer, Borucki, Butler, Canup, Castillo, Castillo, Charbonneau, Cooper, de Pater, Debes, Deming, Dimitar D. Sasselov, Frost, Gu, Haghighipour, Jaupart, Karato, Kaula, Laughlin, Lecoanet, Lee, Lee, Mandell, Mardling, Martín, Miller-Ricci, Murray, Nagasawa, Namouni, Nowick, O'Connell, Poirier, Richard J. O'Connell, Scharf, Showman, Takeda, Terquem, Thommes, Tremaine, Wade G. Henning, Wright, Yoder, Yu, Zhou, Zschau   +45 more
core   +1 more source