Theoretical models of planetary system formation
نویسندگان
چکیده
منابع مشابه
Planetary formation in the γ Cephei system
We numerically investigate under which conditions the planet detected at 2.1 AU of γ Cephei could form through the core-accretion scenario despite the perturbing presence of the highly eccentric companion star. We first show that the initial stage of runaway accretion of kilometer-sized planetesimals is possible within 2.5 AU from the central star only if large amounts of gas are present. In th...
متن کاملDiscs and Planetary Formation
The formation, structure and evolution of protoplanetary discs is considered. The formation of giant planets within the environment of these models is also discussed.
متن کاملPlanetary system formation in thermally evolving viscous protoplanetary discs.
Observations of extrasolar planets are providing new opportunities for furthering our understanding of planetary formation processes. In this paper, we review planet formation and migration scenarios and describe some recent simulations that combine planetary accretion and gas-disc-driven migration. While the simulations are successful at forming populations of low- and intermediate-mass planet...
متن کاملThe evolution of the neutral gas in planetary nebulae: theoretical models
This paper theoretically models the emission expected from shells (generalized to include tori or clumps) expanding away from the hot central stars of PNe. We examine the effects of shocks, FUV (6 eV < hν < 13.6 eV), and soft X rays (50 eV ∼hν ∼ 1 KeV) on the predominantly neutral gas and follow the time dependent chemistry for H2, solving for the chemical and temperature structure and the emer...
متن کاملMetallicity, planetary formation and migration
Recent observations show a clear correlation between the probability of hosting a planet and the metallicity of the parent star. Since radial velocity surveys are biased, however, towards detecting planets with short orbital periods, the probabilitymetallicity correlation could merely reflect a dependence of migration rates on metallicity. We investigated the possibility, but find no basis to s...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2015
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361/201424295