Formation of Terrestrial Planets
arXiv:1803.08830 · doi:10.1007/978-3-319-55333-7_142
Abstract
The past decade has seen major progress in our understanding of terrestrial planet formation. Yet key questions remain. In this review we first address the growth of 100 km-scale planetesimals as a consequence of dust coagulation and concentration, with current models favoring the streaming instability. Planetesimals grow into Mars-sized (or larger) planetary embryos by a combination of pebble- and planetesimal accretion. Models for the final assembly of the inner Solar System must match constraints related to the terrestrial planets and asteroids including their orbital and compositional distributions and inferred growth timescales. Two current models -- the Grand-Tack and low-mass (or empty) primordial asteroid belt scenarios -- can each match the empirical constraints but both have key uncertainties that require further study. We present formation models for close-in super-Earths -- the closest current analogs to our own terrestrial planets despite their very different formation histories -- and for terrestrial exoplanets in gas giant systems. We explain why super-Earth systems cannot form in-situ but rather may be the result of inward gas-driven migration followed by the disruption of compact resonant chains. The Solar System is unlikely to have harbored an early system of super-Earths; rather, Jupiter's early formation may have blocked the ice giants' inward migration. Finally, we present a chain of events that may explain why our Solar System looks different than more than 99\% of exoplanet systems.
Review to appear as a chapter in the "Handbook of Exoplanets", ed. H. Deeg & J.A. Belmonte
References in corpus (95)
- Theory of Star Formation
- Seven temperate terrestrial planets around the nearby ultracool dwarf star TRAPPIST-1
- The origins and concentrations of water, carbon, nitrogen and noble gases on Earth
- Dynamical Outcomes of Planet-Planet Scattering
- Most 1.6 Earth-Radius Planets are not Rocky
- The Occurrence and Mass Distribution of Close-in Super-Earths, Neptunes, and Jupiters
- Formation of Hot Planets by a combination of planet scattering, tidal circularization, and Kozai mechanism
- Solar System evolution from compositional mapping of the asteroid belt
- Building Terrestrial Planets
- Origins of Eccentric Extrasolar Planets: Testing the Planet-Planet Scattering Model
- Separating gas-giant and ice-giant planets by halting pebble accretion
- Towards planetesimals: dense chondrule clumps in the protoplanetary nebula
- Gaps, Rings, and Non-Axisymmetric Structures in Protoplanetary Disks - From Simulations to ALMA Observations
- Migration and the formation of systems of hot super-Earths and Neptunes
- On the diversity and statistical properties of protostellar discs
- Dynamics of the giant planets of the solar system in the gaseous proto-planetary disk and relationship to the current orbital architecture
- A New Planet Around an M Dwarf: Revealing a Correlation Between Exoplanets and Stellar Mass
- A stellar-mass-dependent drop in planet occurrence rates
- The Mass of KOI-94d and a Relation for Planet Radius, Mass, and Incident Flux
- Halting Type I planet migration in non-isothermal disks
- Origin of water in the inner Solar System: Planetesimals scattered inward during Jupiter and Saturn's rapid gas accretion
- Planetesimal formation starts at the snow line
- Water Delivery and Giant Impacts in the 'Grand Tack' Scenario
- Make Super-Earths, Not Jupiters: Accreting Nebular Gas onto Solid Cores at 0.1 AU and Beyond
- The timeline of the Lunar bombardment - revisited
- Kepler constraints on planets near hot Jupiters
- Grain Retention and Formation of Planetesimals near the Snow Line in MRI-driven Turbulent Protoplanetary Disks
- Dust size distributions in coagulation/fragmentation equilibrium: Numerical solutions and analytical fits
- Dust coagulation in protoplanetary disks: porosity matters
- On the corotation torque in a radiatively inefficient disk
- Highly Siderophile Elements in the Earth's Mantle as a Clock for the Moon-forming Impact
- Planets around evolved intermediate-mass stars. I. Two substellar companions in the open clusters NGC 2423 and NGC 4349
- Constraints on the mass of a habitable planet with water of nebular origin
- Ocean Planet or Thick Atmosphere: On the Mass-Radius Relationship for Solid Exoplanets with Massive Atmospheres
- Exotic Earths: Forming Habitable Worlds with Giant Planet Migration
- A resonant chain of four transiting, sub-Neptune planets
- On the Location of the Snow Line in a Protoplanetary Disk
- Close-in planetesimal formation by pile-up of drifting pebbles
- A decreased probability of habitable planet formation around low-mass stars
- Initial mass function of planetesimals formed by the streaming instability
- Migration of massive planets in accreting disks
- ALMA continuum observations of the protoplanetary disk AS 209. Evidence of multiple gaps opened by a single planet
- Observable Consequences of Planet Formation Models in Systems with Close-in Terrestrial Planets
- Planetesimal formation around the snow line in MRI-driven turbulent protoplanetary disks
- Challenges in Planet Formation
- The Impact of Dust Evolution and Photoevaporation on Disk Dispersal
- A perspective from extinct radionuclides on a Young Stellar Object: The Sun and its accretion disk
- On disc protoplanet interactions in a non-barotropic disc with thermal diffusion
- Reduced gas accretion on super-Earths and ice giants
- Survival of the mm-cm size grain population observed in protoplanetary disks
- On the evolution of eccentric and inclined protoplanets embedded in protoplanetary disks
- Hot super-Earths and giant planet cores from different migration histories
- Can dust coagulation trigger streaming instability?
- Ice Lines, Planetesimal Composition and Solid Surface Density in the Solar Nebula
- Formation of close in Super-Earths \& Mini-Neptunes: Required Disk Masses \& Their Implications
- Jupiter's Decisive Role in the Inner Solar System's Early Evolution
- Formation of dust-rich planetesimals from sublimated pebbles inside of the snow line
- Lunar and Terrestrial Planet Formation in the Grand Tack Scenario
- On the formation and migration of giant planets in circumbinary discs
- Evolution of Water Reservoirs on Mars: Constraints from Hydrogen Isotopes in Martian Meteorites
- The Delivery of Water During Terrestrial Planet Formation
- Gas giant planets as dynamical barriers to inward-migrating super-Earths
- A reassessment of the in situ formation of close-in super-Earths
- Erosion and the limits to planetesimal growth
- The GENGA Code: Gravitational Encounters in N-body simulations with GPU Acceleration
- Could we identify hot Ocean-Planets with CoRoT, Kepler and Doppler velocimetry?
- Particle dynamics in discs with turbulence generated by the vertical shear instability
- On the formation of terrestrial planets in hot-Jupiter systems
- Growing and moving low-mass planets in non-isothermal disks
- The Feeding Zones of Terrestrial Planets and Insights into Moon Formation
- Impact splash chondrule formation during planetesimal recycling
- On the vertical-shear instability in astrophysical discs
- Rapid Formation of Icy Super-Earths and the Cores of Gas Giant Planets
- Does the presence of planets affect the frequency and properties of extrasolar Kuiper Belts? Results from the Herschel DEBRIS and DUNES surveys
- Constraining the giant planets' initial configuration from their evolution: implications for the timing of the planetary instability
- Disk Dispersal and Planet Formation Time Scales
- Implications of the interstellar object 1I/'Oumuamua for planetary dynamics and planetesimal formation
- Outward migration of Jupiter and Saturn in 3:2 or 2:1 resonance in radiative disks: implications for the Grand Tack and Nice models
- Formation and accretion history of terrestrial planets from runaway growth through to late time: implications for orbital eccentricity
- The Grand Tack model: a critical review
- Terrestrial Planet Formation in the Presence of Migrating Super-earths
- Terrestrial Planet Formation from an Annulus
- Tests of In-Situ Formation Scenarios for Compact Multiplanet Systems
- Overcoming the Meter Barrier and The Formation of Systems with Tightly-packed Inner Planets (STIPs)
- Is the Grand Tack model compatible with the orbital distribution of main belt asteroids?
- The Asteroid Belt as a Relic From a Chaotic Early Solar System
- Prompt planetesimal formation beyond the snow line
- The maximum mass of planetary embryos formed in core-accretion models
- Predictions for the correlation between giant and terrestrial extrasolar planets in dynamically evolved systems
- Vulcan Planets: Inside-Out Formation of the Innermost Super-Earths
- Decimetre dust aggregates in protoplanetary discs
- Pebble Accretion in Turbulent Protoplanetary Disks
- Planetesimal collisions as a chondrule forming event
- How thick are Mercury's polar water ice deposits?
- Onset of oligarchic growth and implication for accretion histories of dwarf planets
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- Loss and fractionation of noble gas isotopes and moderately volatile elements from planetary embryos and early Venus, Earth and Mars
- Formation of Venus, Earth and Mars: Constrained by isotopes
- Setting the Stage: Planet formation and Volatile Delivery
- Radiogenic power and geoneutrino luminosity of the Earth and other terrestrial bodies through time
- A Family of Phase Masks For Broadband Coronagraphy Example of the Wrapped Vortex Phase Mask Theory and Laboratory demonstration
- Dynamical avenues for Mercury's origin II: in-situ formation in the inner terrestrial disk
- The early instability scenario: Mars' mass explained by Jupiter's orbit
- Explaining Mercury via a single giant impact is highly unlikely
- On the Degree of Dynamical Packing in the Kepler Multi-planet Systems
- Formation of Planetary Populations III: Core Composition & Atmospheric Evaporation
- Earth-size planet formation in the habitable zone of circumbinary stars