Results 1 to 10 of about 65,635 (192)
Exploring Exoplanet Dynamics With JWST: Tides, Rotation, Rings, and Moons [PDF]
Proceedings of the National Academy of Sciences of the United States of AmericaAlthough nearly 6,000 exoplanets are currently known, in most cases, our knowledge is limited to a handful of the planet’s orbital characteristics and bulk properties such as radius and mass. The James Webb Space Telescope (JWST) can expand our knowledge not only by probing exoplanet atmospheres but also by measuring additional orbital and physical ...
Sarah C. Millholland, Joshua N. Winn
exaly +5 more sources
Rocky Planet Rotation, Thermal Tide Resonances, and the Influence of Biological Activity [PDF]
Astrobiology, 2018 Scharf C.
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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 +2 more
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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
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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 +23 more
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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 +4 more
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Potential Melting of Extrasolar Planets by Tidal Dissipation
The Astrophysical JournalTidal heating on Io due to its finite eccentricity was predicted to drive surface volcanic activity, which was subsequently confirmed by the Voyager spacecraft.
Darryl Z. Seligman +8 more
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Polar Neptunes Are Stable to Tides
The Astrophysical JournalThere is an intriguing and growing population of Neptune-sized planets with stellar obliquities near ∼90°. One previously proposed formation pathway is a disk-driven resonance, which can take place at the end stages of planet formation in a system ...
Emma M. Louden, Sarah C. Millholland
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Case Study of a Super-eccentric Warm Jupiter Migrating via Equilibrium and Dynamical Tides
The Astrophysical JournalA leading theory for hot Jupiter formation is high-eccentricity migration, in which planets are born at large separations and excited to near-unity eccentricities, creating extreme tidal dissipation that shrinks and circularizes their orbits.
Donald Liveoak +2 more
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The Astrophysical JournalMost multiplanet systems around mature (∼5 Gyr old) host stars are nonresonant. Even the near-resonant planet pairs still display 1%–2% positive deviation from perfect period commensurabilities (Δ) near first-order mean motion resonances (MMRs). Resonant
Yuancheng Xu, Fei Dai
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