Production of hot Jupiter candidates from high-eccentricity mechanisms for different initial planetary mass configurations
arXiv:2210.11760 · doi:10.1093/mnras/stac3004
Abstract
Hot Jupiters (HJs) are giant planets with orbital periods of the order of a few days with semimajor axis within 0.1 au. Several theories have been invoked in order to explain the origin of this type of planets, one of them being the high-eccentricity migration. This migration can occur through different high-eccentricity mechanisms. Our investigation focused on six different kinds of high-eccentricity mechanisms, namely, direct dispersion, coplanar, Kozai-Lidov, secular chaos, E1 and E2 mechanisms. We investigated the efficiency of these mechanisms for the production of HJ candidates in multi-planet systems initially tightly-packed in the semimajor axis, considering a large set of numerical simulations of the exact equations of motion in the context of the N-body problem. In particular, we analyzed the sensitivity of our results to the initial number of planets, the initial semimajor axis of the innermost planetary orbit, the initial configuration of planetary masses, and to the inclusion of general relativity effects. We found that the E1 mechanism is the most efficient in producing HJ candidates both in simulations with and without the contribution of general relativity, followed by the Kozai-Lidov and E2 mechanisms. Our results also revealed that, except for the initial equal planetary mass configuration, the E1 mechanism was notably efficient in the other initial planetary mass configurations considered in this work. Finally, we investigated the production of HJ candidates with prograde, retrograde, and alternating orbits. According to our statistical analysis, the Kozai-Lidov mechanism has the highest probability of significantly exciting the orbital inclinations of the HJ candidates.
Accepted for publication in MNRAS. 17 pages, 13 figures, 7 tables
References in corpus (20)
- Dynamical Outcomes of Planet-Planet Scattering
- Formation of Hot Planets by a combination of planet scattering, tidal circularization, and Kozai mechanism
- Origins of Eccentric Extrasolar Planets: Testing the Planet-Planet Scattering Model
- Tidal friction in close-in satellites and exoplanets. The Darwin theory re-visited
- Hot Jupiters from Coplanar High-eccentricity Migration
- Post-Oligarchic Evolution of Protoplanetary Embryos and the Stability of Planetary Systems
- Steady-state planet migration by the Kozai-Lidov mechanism in stellar binaries
- Hot Jupiters: Origins, Structure, Atmospheres
- Planet-planet scattering in planetesimal disks
- On the Occurrence Rate of Hot Jupiters in Different Stellar Environments
- Mean motion resonances from planet-planet scattering
- Chaotic Tides in Migrating Gas Giants: Forming Hot and Transient Warm Jupiters via High-Eccentricity Migration
- An Eccentric Massive Jupiter Orbiting a Sub-Giant on a 9.5 Day Period Discovered in the Transiting Exoplanet Survey Satellite Full Frame Images
- Effects of Secular Interactions in Extrasolar Planetary Systems
- Formation of Hot Jupiters through Secular Chaos and Dynamical Tides
- Dynamical behaviour of multiplanet systems close to their stability limit
- Secular dynamics of coplanar, non-resonant planetary system under the general relativity and quadrupole moment perturbations
- The influence of general-relativity effects, dynamical tides and collisions on planet-planet scattering close to the star
- Secular evolution of close in planets: the effects of general relativity
- Possible Outcomes of Coplanar High-eccentricity Migration: Hot Jupiters, Close-in Super-Earths, and Counter-orbiting Planets