منابع مشابه
Planetesimal accretion in binary star systems
Numerical simulations of planetesimal accretion in circumprimary and circumbinary orbits are described. The secular perturbations by the companion star and gas drag are included in our models. We derive limits on the parameters of the binary system for which accretion and then planetary formation are possible. In the circumbinary case we also outline the radial distance from the baricenter of t...
متن کاملPlanetesimal Accretion in Binary Systems: the Effects of Gas Dissipation
Currently, one of major problems concerning planet formation theory in close binary systems is, the strong perturbation from the companion star can increase relative velocities (△V ) of planetesimals around the primary and thus hinder their growth. According to previous studies, while gas drag can reduce the △V between bodies of the same sizes by forcing orbital alignment to planetesimals, it i...
متن کاملPlanetesimal Accretion in Binary Systems: Role of the Companion’s Orbital Inclination
Recent observations show that planet can reside in close binary systems with stellar separation of only ∼20 AU. However, planet formation in such close binary systems is a challenge to current theory. One of the major theoretical problems occurs in the intermediate stage−planetesimals accretion into planetary embryos−during which the companion’s perturbations can stir up the relative velocites(...
متن کاملSimulation of Pre-planetesimal Collisions with Smoothed Particle Hydrodynamics
It is widely accepted that planets form in protoplanetary discs. These discs, which are produced as a byproduct of stars in the collapse of a molecular cloud [23], initially consist of gas and dust, which interact with each other. The interaction induces size-dependent relative velocities between dust aggregates: the effects of Brownian motion, radial drift, vertical settling, and turbulent mix...
متن کاملPlanetesimal Disk Evolution Driven by Planetesimal-planetesimal Gravitational Scattering
We investigate the process of an inhomogeneous planetesimal disk evolution caused by the planetesimal-planetesimal gravitational scattering. We develop a rather general approach based on the kinetic theory which self-consistently describes the evolution in time and space of both the disk surface density and its kinematic properties — dispersions of eccentricity and inclination. The gravitationa...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society: Letters
سال: 2010
ISSN: 1745-3925,1745-3933
DOI: 10.1111/j.1745-3933.2010.00816.x