منابع مشابه
Disk-Planet Interactions During Planet Formation
The discovery of close orbiting extrasolar giant planets led to extensive studies of disk planet interactions and the forms of migration that can result as a means of accounting for their location. Early work established the type I and type II migration regimes for low mass embedded planets and high mass gap forming planets respectively. While providing an attractive means of accounting for clo...
متن کاملChaotic dynamics of planet-encountering bodies
The dynamics of two families of minor inner solar system bodies that suuer frequent close encounters with the planets is analyzed. These families are: Jupiter family comets (JF comets) and Near Earth Asteroids (NEAs). The motion of these objects has been considered to be chaotic in a short time scale, and the close encounters are supposed to be the cause of the fast chaos. For a better understa...
متن کاملTerrestrial Planet Formation
The standard planetesimal model of terrestrial-planet formation is based on astronomical and cosmochemical observations, and the results of laboratory experiments and numerical simulations. In this model, planets grow in a series of stages beginning with the μm-sized dust grains observed in protoplanetary disks. Dust grains readily stick together to form mm-to-cm-sized aggregates, some of which...
متن کاملTesting Bimodal Planet Formation
We suggest that the observed break in giant-planet frequency as a function of host metallicity at Z = 0.02 may be a reflection of bimodal planet formation. We search for signatures of this bimodality in the distributions of the planet eccentricities, periods, masses, and multiplicity. However, the low-metallicity sample is at present too small to test for any but the most severe differences in ...
متن کاملPlanet Formation with Migration
In the core-accretion model, gas-giant planets form solid cores which then accrete gaseous envelopes. Tidal interactions with disk gas cause a core to undergo inward type-I migration in 10 to 10 years. Cores must form faster than this to survive. Giant planets clear a gap in the disk and undergo inward type-II migration in < 10 years if observed disk accretion rates apply to the disk as a whole...
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ژورنال
عنوان ژورنال: Nature
سال: 1999
ISSN: 0028-0836,1476-4687
DOI: 10.1038/45123