On the behaviour of spin-orbit connection of exoplanets
arXiv:2305.14455 · doi:10.1038/s41550-023-01976-0
Abstract
Star-planet interactions play, among other things, a crucial role in planetary orbital configurations by circularizing orbits, aligning the star and planet spin and synchronizing stellar rotation with orbital motions. This is especially true for innermost giant planets, which can be schematized as binary systems with a very large mass ratio. Despite a few examples where spin-orbit synchronization has been obtained, there is no demographic study on synchronous regimes in those systems yet. Here we use a sample of 1,055 stars with innermost planet companions to show the existence of three observational loci of star-planet synchronization regimes. Two of them have dominant fractions of subsynchronous and supersynchronous star-planet systems, and a third less populated regime of potentially synchronized systems. No synchronous star-planet system with a period higher than 40 days has been detected yet. This landscape is different from eclipsing binary systems, most of which are synchronized. We suggest that planets in a stable asynchronous spin state belonging to star-planet systems in a supersynchronized regime offer the most favourable conditions for habitability.
arXiv comment15 pages, 1 figure in main paper, 6 supplementary figures. Published in Nature Astronomy, May 2023
References in corpus (46)
- Modules for Experiments in Stellar Astrophysics (MESA)
- The Transiting Exoplanet Survey Satellite
- Modules for Experiments in Stellar Astrophysics (MESA): Giant Planets, Oscillations, Rotation, and Massive Stars
- Modules for Experiments in Stellar Astrophysics (MESA): Binaries, Pulsations, and Explosions
- MESA Isochrones and Stellar Tracks (MIST). I: Solar-Scaled Models
- Gaia Data Release 1. Summary of the astrometric, photometric, and survey properties
- MESA Isochrones and Stellar Tracks (MIST) 0: Methods for the construction of stellar isochrones
- Grids of stellar models with rotation - I. Models from 0.8 to 120 Msun at solar metallicity (Z = 0.014)
- The Occurrence and Architecture of Exoplanetary Systems
- The NASA Exoplanet Archive: Data and Tools for Exoplanet Research
- The fast spin-rotation of a young extrasolar planet
- Weakened magnetic braking as the origin of anomalously rapid rotation in old field stars
- Tidal Evolution of Close-in Extra-Solar Planets
- Improved angular momentum evolution model for solar-like stars
- 3D climate modeling of close-in land planets: Circulation patterns, climate moist bistability and habitability
- Stellar Rotation Periods of the Kepler Objects of Interest: A Dearth of Close-in Planets around Fast Rotators
- Improved angular momentum evolution model for solar-like stars II. Exploring the mass dependence
- Tidal Locking of Habitable Exoplanets
- Asynchronous rotation of Earth-mass planets in the habitable zone of lower-mass stars
- Magnetic cycles of the planet-hosting star tauBootis
- Rotation Periods, Variability Properties and Ages for Kepler Exoplanet Candidate Host Stars
- Photometric Amplitude Distribution of Stellar Rotation of Kepler KOIs-Indication for Spin-Orbit Alignment of Cool Stars and High Obliquity for Hot Stars
- The CORALIE survey for southern extra-solar planets VIII. The very low-mass companions of HD141937, HD162020, HD168443, HD202206: brown dwarfs or superplanets?
- Tidal Synchronization and Differential Rotation of Kepler Eclipsing Binaries
- Climate Stability of Habitable Earth-like Planets
- Transiting exoplanets from the CoRoT space mission IV: CoRoT-Exo-4b: A transiting planet in a 9.2 day synchronous orbit
- Deep MMT Transit Survey of the Open Cluster M37 III: Stellar Rotation at 550 Myr
- Water-Trapped Worlds
- Why is there a Dearth of Close-In Planets around Fast-Rotating stars?
- Architectures of Planetary Systems and Implications for their Formation
- Photospheric activity and rotation of the planet-hosting star CoRoT-Exo-4a
- Stellar Rotation in the K2 Sample: Evidence for Modified Spindown
- As the Worlds Turn: Constraining Spin Evolution in the Planetary-Mass Regime
- Evolution of star-planet systems under magnetic braking and tidal interaction
- Overview of semi-sinusoidal stellar variability with the CoRoT satellite
- The rotation of planets hosting atmospheric tides: from Venus to habitable super-earths
- Rotating Stars from Kepler Observed with Gaia DR2
- Dynamical tide in stellar radiative zones. General formalism and evolution for low-mass stars
- Inferring the Rotation Period Distribution of Stars from their Projected Rotation Velocities and Radii: Application to late-F/early-G Kepler Stars
- Tidal Effects on the Radial Velocities of V723 Mon: Additional Evidence for a Dark Companion
- Solar System Moons as Analogs for Compact Exoplanetary Systems
- Atmospheric Dynamics of a Near Tidally Locked Earth-Size Planet
- Rotation period distribution of CoRoT and Kepler Sun-like stars
- Atmospheric stability and collapse on tidally locked rocky planets
- On the Evolution of Rotational Modulation Amplitude in Solar-mass Main-sequence Stars
- A dearth of close-in planets around rapidly rotating stars or a dearth of data?