On the Correlation between Hot Jupiters and Stellar Clustering: High-eccentricity Migration Induced by Stellar Flybys
arXiv:2102.07898 · doi:10.3847/1538-4357/abf8a7
Abstract
A recent observational study suggests that the occurrence of hot Jupiters (HJs) around solar-type stars is correlated with stellar clustering. We study a new scenario for HJ formation, called "Flyby Induced High-e Migration", that may help explain this correlation. In this scenario, stellar flybys excite the eccentricity and inclination of an outer companion (giant planet, brown dwarf, or low-mass star) at large distance (10-300 au), which then triggers high-e migration of an inner cold Jupiter (at a few astronomical units) through the combined effects of von Zeipel-Lidov-Kozai (ZLK) eccentricity oscillation and tidal dissipation. Using semianalytical calculations of the effective ZLK inclination window, together with numerical simulations of stellar flybys, we obtain the analytic estimate for the HJ occurrence rate in this formation scenario. We find that this "flyby induced high-e migration" could account for a significant fraction of the observed HJ population, although the result depends on several uncertain parameters, including the density and lifetime of birth stellar clusters, and the occurrence rate of the "cold Jupiter + outer companion" systems.
arXiv comment10 pages, 5 figures, accepted in ApJ
References in corpus (40)
- SciPy 1.0--Fundamental Algorithms for Scientific Computing in Python
- Array Programming with NumPy
- Gaia Data Release 2. Summary of the contents and survey properties
- A Survey of Stellar Families: Multiplicity of Solar-Type Stars
- Shrinking binary and planetary orbits by Kozai cycles with tidal friction
- REBOUND: An open-source multi-purpose N-body code for collisional dynamics
- IAS15: A fast, adaptive, high-order integrator for gravitational dynamics, accurate to machine precision over a billion orbits
- Planet Migration and Binary Companions: the case of HD 80606b
- Origins of Hot Jupiters
- Formation of Hot Planets by a combination of planet scattering, tidal circularization, and Kozai mechanism
- The Gemini Planet Imager Exoplanet Survey: Giant Planet and Brown Dwarf Demographics From 10-100 AU
- Secular Chaos and the Production of Hot Jupiters
- On the Formation of Hot Jupiters in Stellar Binaries
- Hints for a Turnover at the Snow Line in the Giant Planet Occurrence Rate
- Multiple-Planet Scattering and the Origin of Hot Jupiters
- The effects of fly-bys on planetary systems
- Inverse dynamical population synthesis: Constraining the initial conditions of young stellar clusters by studying their binary populations
- Suppression of extreme orbital evolution in triple systems with short range forces
- Hot Jupiters from Coplanar High-eccentricity Migration
- Steady-state planet migration by the Kozai-Lidov mechanism in stellar binaries
- Formation and Stellar Spin-Orbit Misalignment of Hot Jupiters from Lidov-Kozai Oscillations in Stellar Binaries
- The Kinematics of the Scorpius-Centaurus OB Association from Gaia DR1
- The Effect of Encounters on the Eccentricity of Binaries in Clusters
- The effects of dynamical interactions on planets in young substructured star clusters
- Early evolution of the birth cluster of the solar system
- Cross Sections for Planetary Systems Interacting with Passing Stars and Binaries
- Stability of Multiplanetary Systems in Star Clusters
- Chaotic Tides in Migrating Gas Giants: Forming Hot and Transient Warm Jupiters via High-Eccentricity Migration
- Stellar clustering shapes the architectures of planetary systems
- Dynamical Interactions Make Hot Jupiters in Open Star Clusters
- Eccentricity and Spin-Orbit Misalignment in Short-Period Stellar Binaries as a Signpost of Hidden Tertiary Companions
- Formation of Hot Jupiters through Secular Chaos and Dynamical Tides
- The formation efficiency of close-in planets via Lidov-Kozai migration: analytic calculations
- Testing the universality of star formation - II. Comparing separation distributions of nearby star-forming regions and the field
- Giant Planet Scatterings and Collisions: Hydrodynamics, Merger-Ejection Branching Ratio, and Properties of the Remnants
- Fly-by encounters between two planetary systems II: Exploring the interactions of diverse planetary system architectures
- Secular dynamics of binaries in stellar clusters II: dynamical evolution
- Secular dynamics of binaries in stellar clusters I: general formulation and dependence on cluster potential
- Hot Jupiter and ultra-cold Saturn formation in dense star clusters
- ODEA: Orbital Dynamics in a complex Evolving Architecture -- Application to the planetary system HD 106906
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- Planet Occurrence Rate Correlated to Stellar Dynamical History: Evidence from Kepler and Gaia
- Hot Jupiters, cold kinematics: High phase space densities of host stars reflect an age bias
- Exciting spiral arms in protoplanetary discs from flybys
- Free-Floating Planets, Survivor Planets, Captured Planets and Binary Planets from Stellar Flybys
- Leaning Sideways: VHS 1256-1257 b is a Super-Jupiter with a Uranus-like Obliquity
- Hot Jupiter formation in dense clusters: secular chaos in multi-planetary systems
- TOI-4562 b: A highly eccentric temperate Jupiter analog orbiting a young field star
- The Mass Ratio Distribution of Tertiary Induced Binary Black Hole Mergers
- Understanding the Planetary Formation and Evolution in Star Clusters(UPiC)-I: Evidence of Hot Giant Exoplanets Formation Timescales
- TESS Timings of 31 Hot Jupiters with Ephemeris Uncertainties
- Making hot Jupiters in stellar clusters: the importance of binary exchange
- The Impact of Stellar Clustering on the Observed Multiplicity of Super-Earth systems: Outside-in Cascade of Orbital Misalignments Initiated by Stellar Flybys
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- Forming short period sub-stellar companions in 47 Tucanae -- II. Analytic expressions for the orbital evolution of planets in dense environments
- Stellar Obliquity Excitation via Disk Dispersal-Driven Resonances in Binaries
- Architecture of planetary systems predicted from protoplanetary disks observed with ALMA II: evolution outcomes and dynamical stability
- Evidence for the Late Arrival of Hot Jupiters in Systems with High Host-star Obliquities