Planetesimal Accretion in Binary Star Systems
نویسندگان
چکیده
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...
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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...
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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(...
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Aims. In the context of the core instability model, we present calculations of in situ giant planet formation. The oligarchic growth regime of solid protoplanets is the model adopted for the growth of the core. This growth regime for the core has not been considered before in full evolutionary calculations of this kind. Methods. The full differential equations of giant planet formation were num...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2000
ISSN: 0004-637X,1538-4357
DOI: 10.1086/317091