Terrestrial Planet Formation I. The Transition from Oligarchic Growth to Chaotic Growth

Abstract

We use a hybrid, multiannulus, n-body-coagulation code to investigate the growth of km-sized planetesimals at 0.4-2 AU around a solar-type star. After a short runaway growth phase, protoplanets with masses of roughly 10^26 g and larger form throughout the grid. When (i) the mass in these `oligarchs' is roughly comparable to the mass in planetesimals and (ii) the surface density in oligarchs exceeds 2-3 g/sq cm at 1 AU, strong dynamical interactions among oligarchs produce a high merger rate which leads to the formation of several terrestrial planets. In disks with lower surface density, milder interactions produce several lower mass planets. In all disks, the planet formation timescale is roughly 10-100 Myr, similar to estimates derived from the cratering record and radiometric data.

arXiv commentAstronomical Journal, accepted; 22 pages + 15 figures in ps format; eps figures at http://cfa-www.harvard.edu/~kenyon/dl/ revised version clarifies evolution and justifies choice of promotion masses

References in corpus (21)

• Disk Frequencies and Lifetimes in Young Clusters
• Catastrophic disruptions revisited
• Planet Formation by Coagulation: A Focus on Uranus and Neptune
• Oligarchic growth of giant planets
• The Truncated Disk of CoKu Tau/4
• Final Stages of Planet Formation
• Accretion in the Early Kuiper Belt II. Fragmentation
• The Size Distribution of Kuiper Belt Objects
• Accretion in the Early Kuiper Belt I. Coagulation and Velocity Evolution
• Prospects for Detection of Catastrophic Collisions in Debris Disks
• Detecting the Dusty Debris of Terrestrial Planet Formation
• Planets and IR Excesses: Preliminary Results from a Spitzer/MIPS Survey of Solar-Type Stars
• The formation of Uranus and Neptune among Jupiter and Saturn
• The Size-Frequency Distribution of the Zodiacal Cloud: Evidence from the Solar System Dust Bands
• Dusty Rings: Signposts of Recent Planet Formation
• The growth of planetary embryos: orderly, runaway, or oligarchic?
• Disk evolution in the Ori OB1 association
• Dynamical evolution of planetesimals in protoplanetary disks
• Termination of planetary accretion due to gap formation
• Planetesimal disk evolution driven by embryo-planetesimal gravitational scattering
• Planetesimal disk evolution driven by planetesimal-planetesimal gravitational scattering

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