ON THE ORIGIN OF PLANETS AT VERY WIDE ORBITS FROM THE RECAPTURE OF FREE FLOATING PLANETS

@article{Perets2012ONTO,
  title={ON THE ORIGIN OF PLANETS AT VERY WIDE ORBITS FROM THE RECAPTURE OF FREE FLOATING PLANETS},
  author={Hagai B. Perets and M. B. N. Kouwenhoven},
  journal={The Astrophysical Journal},
  year={2012},
  volume={750},
  pages={83}
}
In recent years, several planets have been discovered at wide orbits (>100 AU) around their host stars. Theoretical studies encounter difficulties in explaining their formation and origin. Here we propose a novel scenario for the production of planetary systems at such orbits, through the dynamical recapture of free floating planets (FFPs) in dispersing stellar clusters and stellar associations. This process is a natural extension of the recently suggested scenario for the formation of wide… 

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References

SHOWING 1-10 OF 45 REFERENCES
The effects of dynamical interactions on planets in young substructured star clusters
We present N-body simulations of young substructured star clusters undergoing various dynamical evolutionary scenarios and examine the direct effects of interactions in the cluster on planetary
Dynamics of Planetary Systems in Star Clusters
At least 10%-15% of nearby Sunlike stars have known Jupiter-mass planets. In contrast, very few planets are found in mature open and globular clusters such as the Hyades and 47 Tuc. We explore here
FORMATION, SURVIVAL, AND DETECTABILITY OF PLANETS BEYOND 100 AU
Direct imaging searches have begun to detect planetary and brown dwarf companions and to place constraints on the presence of giant planets at large separations from their host star. This work helps
THE FORMATION MECHANISM OF GAS GIANTS ON WIDE ORBITS
The recent discoveries of massive planets on ultra-wide orbits of HR 8799 and Fomalhaut present a new challenge for planet formation theorists. Our goal is to figure out which of three giant planet
The Modification of Planetary Orbits in Dense Open Clusters
We show that Jovian planets will frequently experience orbital disruption due to interactions with binary stars in their birth clusters. We attack the problem using a Monte Carlo approach and
Interactions Between Moderate- and Long-Period Giant Planets: Scattering Experiments for Systems in Isolation and with Stellar Flybys
The chance that a planetary system will interact with another member of its host star's nascent cluster would be greatly increased if gas giant planets form in situ on wide orbits. In this paper, we
On the Formation of Gas Giant Planets on Wide Orbits
A new suite of three-dimensional radiative, gravitational hydrodynamical models is used to show that gas giant planets are unlikely to form by the disk-instability mechanism at distances of ~100-200
Free‐floating planets in stellar clusters?
We have simulated encounters between planetary systems and single stars in various clustered environments. This allows us to estimate the fraction of systems liberated, the velocity distribution of
The effects of fly‐bys on planetary systems
Most of the observed extrasolar planets are found on tight and often eccentric orbits. The high eccentricities are not easily explained by planet-formation models, which predict that planets should
Multiple-planet Scattering and the Origin of Hot Jupiters
Doppler and transit observations of exoplanets show a pile-up of Jupiter-size planets in orbits with a 3 day period. A fraction of these hot Jupiters have retrograde orbits with respect to the parent
...
1
2
3
4
5
...