Survival of satellites during the migration of a Hot Jupiter
arXiv:2510.10826 · doi:10.1051/0004-6361/202554625
Abstract
We investigate the origin and stability of extrasolar satellites orbiting close-in gas giants, focusing on whether these satellites can survive planetary migration within a protoplanetary disk. To address this question, we used Posidonius, an N-Body code with an integrated tidal model, which we expanded to account for the migration of a gas giant within a disk. Our simulations include tidal interactions between a star and a planet, as well as between the planet and its satellite, while neglecting tides raised by the star on the satellite. We adopt a standard equilibrium tide model for the satellite, planet, and star, and additionally explore the impact of dynamical tides in the convective regions of both the star and planet on satellite survival. We examine key parameters, including the initial satellite-planet distance, disk lifetime (proxy for the planet's final orbital distance), satellite mass, and satellite tidal dissipation. For simulations incorporating dynamical tides, we explore three different initial stellar rotation periods. We find that satellite survival is rare if the satellite has nonzero tidal dissipation. Survival is only possible for initial orbital distances of at least 0.6 times the Jupiter-Io separation and for planets orbiting beyond about 0.1 AU. Satellites that fail to survive are either 1) tidally disrupted, as they experience orbital decay and cross the Roche limit, or 2) dynamically disrupted, where eccentricity excitation drives their periastron within the Roche limit. Satellite survival is more likely for low tidal dissipation and higher satellite mass. Given that satellites around close-in planets appear unlikely to survive planetary migration, our findings suggest that if such satellites do exist, another process should be invoked. In that context, we also discuss the claim of the existence of a putative satellite around WASP-49 A b.
arXiv comment17 pages + 4 pages of Appendix. Accepted in Astronomy & Astrophysics
References in corpus (56)
- Seven temperate terrestrial planets around the nearby ultracool dwarf star TRAPPIST-1
- Towards a Deterministic Model of Planetary Formation I: a Desert in the Mass and Semi Major Axis Distributions of Extra Solar Planets
- IAS15: A fast, adaptive, high-order integrator for gravitational dynamics, accurate to machine precision over a billion orbits
- Models of Giant Planet formation with migration and disc evolution
- WHFast: A fast and unbiased implementation of a symplectic Wisdom-Holman integrator for long term gravitational simulations
- Tidal dissipation in rotating giant planets
- The Equilibrium-Tide Model for Tidal Friction
- Tidal dissipation in rotating solar-type stars
- Is tidal heating sufficient to explain bloated exoplanets? Consistent calculations accounting for finite initial eccentricity
- Transit timing effects due to an exomoon
- In Situ Formation and Dynamical Evolution of Hot Jupiter Systems
- A Circumplanetary Disk Around PDS70c
- Stability of Satellites Around Close-in Extrasolar Giant Planets
- Theoretical models of planetary system formation: mass vs semi-major axis
- Formation of Regular Satellites from Ancient Massive Rings in the Solar System
- Evidence for a Large Exomoon Orbiting Kepler-1625b
- Calibration of Equilibrium Tide Theory for Extrasolar Planet Systems
- Tides in rotating barotropic fluid bodies: the contribution of inertial waves and the role of internal structure
- Layered convection as the origin of Saturn's luminosity anomaly
- Origin of Tidal Dissipation in Jupiter: II. the Value of Q
- Calibration of Equilibrium Tide Theory for Extrasolar Planet Systems II
- Quantification of tidal parameters from Solar system data
- Determination of the Interior Structure of Transiting Planets in Multiple-Planet Systems
- Effect of the rotation and tidal dissipation history of stars on the evolution of close-in planets
- The variation of tidal dissipation in the convective envelope of low-mass stars along their evolution
- Planetary population synthesis
- Formation of Giant Planet Satellites
- An Exomoon Survey of 70 Cool Giant Exoplanets and the New Candidate Kepler-1708 b-i
- Tidal evolution of planets around brown dwarfs
- Mercury-T: A new code to study tidally evolving multi-planet systems. Applications to Kepler-62
- Tidal dissipation in rotating low-mass stars and implications for the orbital evolution of close-in planets I. From the PMS to the RGB at solar metallicity
- No pseudosynchronous rotation for terrestrial planets and moons
- No Evidence for Lunar Transit in New Analysis of Hubble Space Telescope Observations of the Kepler-1625 System
- Sodium and Potassium Signatures of Volcanic Satellites Orbiting Close-in Gas Giant Exoplanets
- Orbital Decay of Short-Period Exoplanets via Tidal Resonance Locking
- The effect of type I migration on the formation of terrestrial planets in hot-Jupiter systems
- Formation of moon systems around giant planets: Capture and ablation of planetesimals as foundation for a pebble accretion scenario
- Massive Satellites of Close-In Gas Giant Exoplanets
- Impact of the frequency dependence of tidal Q on the evolution of planetary systems
- Tidal dissipation and eccentricity pumping: Implications for the depth of the secondary eclipse of 55 Cnc e
- Tidal dissipation in rotating low-mass stars and implications for the orbital evolution of close-in massive planets. II. Effect of stellar metallicity
- Unravelling tidal dissipation in gaseous giant planets
- The large obliquity of Saturn explained by the fast migration of Titan
- The effect of close-in giant planets' evolution on tidal-induced migration of exomoons
- Large Exomoons unlikely around Kepler-1625 b and Kepler-1708 b
- On the impact of tides on the transit-timing fits to the TRAPPIST-1 system
- Application of Orbital Stability and Tidal Migration Constraints for Exomoon Candidates
- Planetary tidal interactions and the rotational evolution of low-mass stars. The Pleiades' anomaly
- Toroidal Atmospheres around Extrasolar Planets
- The ominous fate of exomoons around hot Jupiters in the high-eccentricity migration scenario
- Pathways of Survival of Exomoons and Inner Exoplanets
- Consequences of dynamically unstable moons in extrasolar systems
- Extreme exomoons in WASP-49 Ab: dynamics and detectability
- Drifts of the sub-stellar points of the TRAPPIST-1 planets
- A potential exomoon from the predicted planet obliquity of Pictoris b
- On the influence of equilibrium tides on transit-timing variations of close-in super-Earths. I. Application to single-planet systems and the case of K2-265 b