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Making Extrasolar Planets From Solar Systems Via Dynamical Interactions

Malmberg, Daniel LU and Davies, Melvyn B LU (2010) International Conference on Extrasolar Planets in Multi-Body Systems: Theory and Observations In Extrasolar Planets In Multi-Body Systems: Theory And Observations 42. p.375-383
Abstract
Most stars form in some sort of stellar cluster or association. In such environments the number density of stars is much higher than in the solar neighbourhood, which means that close encounters between stars may be relatively common. Using numerical simulations we quantify the fraction of single stars in the solar neighbourhood that have never suffered a close encounter or been part of a binary system. We call such stars singletons. Furthermore, we study what would happen to a solar-system-like planetary system if its host star was exchanged into a binary system during an exchange encounter in a young stellar cluster. The perturbation of the companion star might in such a system trigger strong planet-planet scatterings. This would... (More)
Most stars form in some sort of stellar cluster or association. In such environments the number density of stars is much higher than in the solar neighbourhood, which means that close encounters between stars may be relatively common. Using numerical simulations we quantify the fraction of single stars in the solar neighbourhood that have never suffered a close encounter or been part of a binary system. We call such stars singletons. Furthermore, we study what would happen to a solar-system-like planetary system if its host star was exchanged into a binary system during an exchange encounter in a young stellar cluster. The perturbation of the companion star might in such a system trigger strong planet-planet scatterings. This would subsequently lead to the ejection of one or more planets, leaving those remaining on tighter and more eccentric orbits. We find that only if the gas giants in solar-system-like planetary systems most often have rather similar masses does the resulting eccentricity distribution resemble that of the observed extrasolar planets. (Less)
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author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
in
Extrasolar Planets In Multi-Body Systems: Theory And Observations
volume
42
pages
375 - 383
publisher
EDP Sciences
conference name
International Conference on Extrasolar Planets in Multi-Body Systems: Theory and Observations
external identifiers
  • wos:000288723400040
  • scopus:78751658576
ISSN
1633-4760
1638-1963
DOI
10.1051/eas/1042040
language
English
LU publication?
yes
id
4d09d697-3820-45ba-b2e3-5b87bbc31f98 (old id 1918034)
date added to LUP
2011-05-12 13:18:12
date last changed
2018-05-29 09:32:51
@inproceedings{4d09d697-3820-45ba-b2e3-5b87bbc31f98,
  abstract     = {Most stars form in some sort of stellar cluster or association. In such environments the number density of stars is much higher than in the solar neighbourhood, which means that close encounters between stars may be relatively common. Using numerical simulations we quantify the fraction of single stars in the solar neighbourhood that have never suffered a close encounter or been part of a binary system. We call such stars singletons. Furthermore, we study what would happen to a solar-system-like planetary system if its host star was exchanged into a binary system during an exchange encounter in a young stellar cluster. The perturbation of the companion star might in such a system trigger strong planet-planet scatterings. This would subsequently lead to the ejection of one or more planets, leaving those remaining on tighter and more eccentric orbits. We find that only if the gas giants in solar-system-like planetary systems most often have rather similar masses does the resulting eccentricity distribution resemble that of the observed extrasolar planets.},
  author       = {Malmberg, Daniel and Davies, Melvyn B},
  booktitle    = {Extrasolar Planets In Multi-Body Systems: Theory And Observations},
  issn         = {1633-4760},
  language     = {eng},
  pages        = {375--383},
  publisher    = {EDP Sciences},
  title        = {Making Extrasolar Planets From Solar Systems Via Dynamical Interactions},
  url          = {http://dx.doi.org/10.1051/eas/1042040},
  volume       = {42},
  year         = {2010},
}