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
doaj +1 more source
Tidal Inflation Reconciles Low-density Sub-Saturns with Core Accretion [PDF]
Astrophysical Journal, 2020 While the solar system contains no planets between the sizes of Uranus and Saturn, our current exoplanet census includes several dozen such planets with well-measured masses and radii. These sub-Saturns exhibit a diversity of bulk densities, ranging from
Sarah C. Millholland +2 more
semanticscholar +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 +4 more
wiley +1 more source
Discrepancies between isochrone fitting and gyrochronology for exoplanet host stars [PDF]
, 2014 Using a sample of 68 planet-hosting stars, I carry out a comparison of isochrone fitting and gyrochronology to investigate whether tidal interactions between the stars and their planets are leading to underestimated ages using the latter method. I find a
D. Brown, D. Brown, D. Brown
semanticscholar +1 more source
ExELS: an exoplanet legacy science proposal for the ESA Euclid mission - II. Hot exoplanets and sub-stellar systems [PDF]
, 2014 The Exoplanet Euclid Legacy Survey (ExELS) proposes to determine the frequency of cold exoplanets down to Earth mass from host separations of ∼1 au out to the free-floating regime by detecting microlensing events in Galactic bulge. We show that ExELS can
I. McDonald +15 more
semanticscholar +1 more source
Asynchronous rotation of Earth-mass planets in the habitable zone of lower-mass stars [PDF]
Science, 2015 Can't keep hot sides hot and cold sides cold? On Earth, we're accustomed to cycles of day and night, which drive a complex thermal relationship between the ground and atmosphere. Some exoplanets very close to their stars aren't so lucky and are generally
J. Leconte +3 more
semanticscholar +1 more source
The GAPS Programme with HARPS-N at TNG - XIV. Investigating giant planet migration history via improved eccentricity and mass determination for 231 transiting planets [PDF]
, 2017 We carried out a Bayesian homogeneous determination of the orbital parameters of 231 transiting giant planets (TGPs) that are alone or have distant companions; we employed differential evolution Markov chain Monte Carlo methods to analyse radial-velocity
A. Bonomo +40 more
semanticscholar +1 more source
Self-consistent Spin, Tidal, and Dynamical Equations of Motion in the REBOUNDx Framework
The Astrophysical Journal, 2023 We introduce self-consistent spin, tidal, and dynamical equations of motion into REBOUNDx , a library of additional effects for the popular N -body integrator REBOUND .
Tiger Lu +6 more
doaj +1 more source
Do Close-in Giant Planets Orbiting Evolved Stars Prefer Eccentric Orbits? [PDF]
Astrophysical Journal, 2018 The NASA Kepler and K2 Missions have recently revealed a population of transiting giant planets orbiting moderately evolved, low-luminosity red giant branch stars.
S. Grunblatt +9 more
semanticscholar +1 more source
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
doaj +1 more source