Global Models of Planet Formation and Evolution

Abstract

Despite the increase in observational data on exoplanets, the processes that lead to the formation of planets are still not well understood. But thanks to the high number of known exoplanets, it is now possible to look at them as a population that puts statistical constraints on theoretical models. A method that uses these constraints is planetary population synthesis. Its key element is a global model of planet formation and evolution that directly predicts observable planetary properties based on properties of the natal protoplanetary disk. To do so, global models build on many specialized models that address one specific physical process. We thoroughly review the physics of the sub-models included in global formation models. The sub-models can be classified as models describing the protoplanetary disk (gas and solids), the (proto)planet (solid core, gaseous envelope, and atmosphere), and finally the interactions (migration and N-body interaction). We compare the approaches in different global models and identify physical processes that require improved descriptions in future. We then address important results of population synthesis like the planetary mass function or the mass-radius relation. In these results, the global effects of physical mechanisms occurring during planet formation and evolution become apparent, and specialized models describing them can be put to the observational test. Due to their nature as meta models, global models depend on the development of the field of planet formation theory as a whole. Because there are important uncertainties in this theory, it is likely that global models will in future undergo significant modifications. Despite this, they can already now yield many testable predictions. With future global models addressing the geophysical characteristics, it should eventually become possible to make predictions about the habitability of planets.

30 pages, 16 figures. Accepted for publication in the International Journal of Astrobiology (Cambridge University Press)

References in corpus (40)

• Direct Imaging of Multiple Planets Orbiting the Star HR 8799
• Mass-Radius Relationships for Solid Exoplanets
• Atmospheric Escape from Hot Jupiters
• Gas- and dust evolution in protoplanetary disks
• The Occurrence and Mass Distribution of Close-in Super-Earths, Neptunes, and Jupiters
• One or more bound planets per Milky Way star from microlensing observations
• On the radiative equilibrium of irradiated planetary atmospheres
• On the Luminosity of Young Jupiters
• Line and Mean Opacities for Ultracool Dwarfs and Extrasolar Planets
• Roche lobe effects on the atmospheric loss of "Hot Jupiters"
• Toward a Deterministic Model of Planetary Formation V. Accumulation Near the Ice Line
• Detection of Carbon Monoxide and Water Absorption Lines in an Exoplanet Atmosphere
• Towards planetesimals: dense chondrule clumps in the protoplanetary nebula
• On the corotation torque in a radiatively inefficient disk
• Ocean Planet or Thick Atmosphere: On the Mass-Radius Relationship for Solid Exoplanets with Massive Atmospheres
• A Spectrum of an Extrasolar Planet
• Ranges of Atmospheric Mass and Composition of Super Earth Exoplanets
• Formation of Jupiter using opacities based on detailed grain physics
• Heat transport in giant (exo)planets: a new perspective
• Gas disks to gas giants: Simulating the birth of planetary systems
• On the Absorption and Redistribution of Energy in Irradiated Planets
• Double-blind test program for astrometric planet detection with Gaia
• Gas accretion onto planetary cores: three-dimensional self-gravitating radiation hydrodynamical calculations
• Evolution of Migrating Planets Undergoing Gas Accretion
• Close encounters in young stellar clusters: implications for planetary systems in the solar neighbourhood
• Massive planet migration: Theoretical predictions and comparison with observations
• Accretion and destruction of planetesimals in turbulent disks
• The opacity of grains in protoplanetary atmospheres
• Spin-Orbit Alignment for the Eccentric Exoplanet HD 147506b
• Grain opacity and the bulk composition of extrasolar planets. I. Results from scaling the ISM opacity
• Formation and structure of the three Neptune-mass planets system around HD69830
• 3D MHD Simulations of Planet Migration in Turbulent Stratified Disks
• Crystalline silicates as a probe of disk formation history
• Deuterium burning in objects forming via the core accretion scenario - Brown dwarfs or planets?
• Infall of planetesimals onto growing giant planets: onset of runaway gas accretion and metallicity of their gas envelopes
• The effect of type I migration on the formation of terrestrial planets in hot-Jupiter systems
• Giant Planet Migration in Viscous Power-Law Discs
• Planet Traps and First Planets: the Critical Metallicity for Gas Giant Formation
• Planets on the Edge
• Core instability models of giant planet accretion II: forming planetary systems

Cited by in corpus (7)

• The imprint of exoplanet formation history on observable present-day spectra of hot Jupiters
• Evolution of Gas Giant Entropy During Formation by Runaway Accretion
• Thermodynamics of Giant Planet Formation: Shocking Hot Surfaces on Circumplanetary Disks
• Dawes Review. The tidal downsizing hypothesis of planet formation
• Efficiency of Planetesimal Ablation in Giant Planetary Envelopes
• First results of the Kourovka Planet Search: discovery of transiting exoplanet candidates in the first three target fields
• Methane Planets and their Mass-Radius Relation