Results 11 to 20 of about 8,504 (191)
How planetary growth outperforms migration [PDF]
Astronomy & Astrophysics, 2019 Planetary migration is a major challenge for planet-formation theories. The speed of type-I migration is proportional to the mass of a protoplanet, while the final decade of growth of a pebble-accreting planetary core takes place at a rate that scales with the mass to the two-thirds power. This results in planetary growth tracks (i.e., the evolution of
Johansen, Anders +2 more
core +6 more sources
Influence of grain size and composition on the contraction rates of planetary envelopes and on planetary migration [PDF]
Astronomy & Astrophysics, 2021 A crucial phase during planetary growth is the migration, when the planetary core has been assembled but has not yet opened a deep gap. During this phase, the planet is subject to fast type-I migration, which is mostly directed inwards, and the planet can lose a significant fraction of its semi-major axis.
Bitsch, Bertram, Savvidou, Sofia
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RESONANT REMOVAL OF EXOMOONS DURING PLANETARY MIGRATION [PDF]
The Astrophysical Journal, 2016 ABSTRACT Jupiter and Saturn play host to an impressive array of satellites, making it reasonable to suspect that similar systems of moons might exist around giant extrasolar planets. Furthermore, a significant population of such planets is known to reside at distances of several Astronomical Units (AU), leading to speculation that some ...
Christopher Spalding +2 more
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Is planetary migration inevitable? [PDF]
, 2003 According to current theories, tidal interactions between a disk and an embedded planet may lead to the rapid migration of the protoplanet on a timescale shorter than the disk lifetime or estimated planetary formation timescales. Therefore, planets can form only if there is a mechanism to hold at least some of the cores back on their way in.
Terquem, CEJMLJ
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TOI-1136 is a Young, Coplanar, Aligned Planetary System in a Pristine Resonant Chain [PDF]
The Astronomical Journal, 2023 Convergent disk migration has long been suspected to be responsible for forming planetary systems with a chain of mean-motion resonances (MMRs). Dynamical evolution over time could disrupt the delicate resonant configuration. We present TOI-1136, a 700 ±
Fei Dai +62 more
doaj +2 more sources
Planetary migration in resonance : the question of the eccentricities [PDF]
EAS Publications Series, 2010 The formation of resonant planets pairs in exoplanetary systems involves planetary migration inside the protoplanetary disc: an inwards migrating outer planet captures in Mean Motion Resonance an inner planet. During the migration of the resonant pair of planets, the eccentricities are expected to rise excessively, if no damping mechanism is applied on
A. Crida, Z. Sándor, W. Kley
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Planetary Migration in Protoplanetary Disks [PDF]
, 2018 The known exoplanet population displays a great diversity of orbital architectures, and explaining the origin of this is a major challenge for planet formation theories. The gravitational interaction between young planets and their protoplanetary disks provides one way in which planetary orbits can be shaped during the formation epoch.
NELSON, RP, Richard P. Nelson
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Effect of Wind-Driven Accretion on Planetary Migration [PDF]
, 2020 Can wind-driven accretion modify planetary migration? Planetary migration plays an important role in planet formation models and statistics of observed exoplanets. So far, the theory of planetary migration has focused on the interaction of one or more planets with an inviscid or viscously evolving gaseous disk.
Kimmig, Carolin
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Planetary formation and early phases
Comptes Rendus. Physique, 2023 Planets form in proto-planetary disks. In this review, we describe the structure and properties of such disks, and the various phenomenons that lead to the final product: a planetary system. First, micrometre dust settles and coagulates.
Crida, Aurélien
doaj +1 more source
Dissipative Capture of Planets into First-order Mean-motion Resonances
The Astrophysical Journal Letters, 2023 The emergence of orbital resonances among planets is a natural consequence of the early dynamical evolution of planetary systems. While it is well established that convergent migration is necessary for mean-motion commensurabilities to emerge, recent ...
Konstantin Batygin, Antoine C. Petit
doaj +1 more source