Results 61 to 70 of about 8,504 (191)
Callisto’s Nonresonant Orbit as an Outcome of Circum-Jovian Disk Substructure
The Astrophysical JournalThe Galilean moons of Io, Europa, and Ganymede exhibit a 4:2:1 commensurability in their mean motions, a configuration known as the Laplace resonance. The prevailing view for the origin of this three-body resonance involves the convergent migration of ...
Teng Ee Yap, Konstantin Batygin
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Is Planetary Migration Inevitable? [PDF]
, 2006 International audienceAccording 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 ...
Terquem, Caroline E. J. M. L. J.
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On the multiple generations of planetary embryos [PDF]
, 2022 Global models of planet formation tend to begin with an initial set of planetary embryos for the sake simplicity. While this approach gives valuable insights on the evolution of the initial embryos, the initial distribution itself is a bold assumption ...
Klahr, Hubert +7 more
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Outward Migration of a Gas Accreting Planet: A Semianalytical Formula
The Astrophysical JournalType II orbital migration is a key process to regulate the mass and semimajor axis distribution of exoplanetary giant planets. The conventional formula of Type II migration generally predicts too rapid inward migration to reconcile with the observed ...
Shigeru Ida +4 more
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Enhanced Size Uniformity for Near-resonant Planets
The Astrophysical Journal, 2023 Super-Earths within the same close-in, compact planetary system tend to exhibit a striking degree of uniformity in their radius, mass, and orbital spacing, and this “peas-in-a-pod” phenomenon itself serves to provide one of the strongest constrains on ...
Armaan V. Goyal, Fei Dai, Songhu Wang
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Type I planetary migration in a self-gravitating disk [PDF]
Proceedings of the International Astronomical Union, 2007 AbstractWe investigate the impact of the disk self-gravity on type I migration. We first show that considering a planet migrating in a disk without self-gravity can lead to a significant overestimate of the migration rate. Unbiased drift rates can be obtained only if the planet and the disk feel the same gravitational potential.
Baruteau, C., Masset, F.
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Neptune trojan formation during planetary instability and migration [PDF]
, 2016 Aims. We investigate the process of Neptune trojan capture and permanence in resonance up to the present time based on a planetary instability migration model. Methods.
D. Nesvorný, R. Gomes
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Microlensing search for extra solar planets [PDF]
, 2015 Gravitational microlensing may be used to probe distant stars for planetary companions. The presence of a planet in the vicinity of a star acting as the lens may cause a short lived anomaly in the observed lightcurve of the lensing event.
Tsapras, Yiannis
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The Planetary Science JournalWe estimate the loss of nitrogen from Pluto over its lifetime, including the giant planet instability period, which we term the “Wild Years.” We analyze the orbital migration of 53 simulated Plutinos, which are Kuiper Belt Objects (KBOs) captured into 3 ...
Perianne E. Johnson +3 more
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Planetary migration in gaseous protoplanetary disks [PDF]
Proceedings of the International Astronomical Union, 2007 AbstractTides come from the fact that different parts of a system do not fall in exactly the same way in a non-uniform gravity field. In the case of a protoplanetary disk perturbed by an orbiting, prograde protoplanet, the protoplanet tides raise a wake in the disk which causes the orbital elements of the planet to change over time.
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