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The instability of planetary systems in binaries: how the Kozai mechanism leads to strong planet-planet interactions

Malmberg, Daniel LU ; Davies, Melvyn B LU and Chambers, John E. (2007) In Monthly Notices of the Royal Astronomical Society 377(1). p.1-4
Abstract
In this Letter we consider the evolution of a planetary system around a star inside a wide binary. We simulate numerically the evolution of the planetary orbits for both coplanar and highly inclined systems. We find that the Kozai mechanism operates in the latter case. This produces a highly eccentric outer planet the orbit of which crosses those of some of the inner planets. Strong planet-planet interactions then follow, resulting in the ejection of one or more planets. We note that planetary systems resembling our Solar system, formed around single stars in stellar clusters, may exchange into binaries and thus will be vulnerable to planet stripping. This process will reduce the number of Solar system-like planetary systems, and may... (More)
In this Letter we consider the evolution of a planetary system around a star inside a wide binary. We simulate numerically the evolution of the planetary orbits for both coplanar and highly inclined systems. We find that the Kozai mechanism operates in the latter case. This produces a highly eccentric outer planet the orbit of which crosses those of some of the inner planets. Strong planet-planet interactions then follow, resulting in the ejection of one or more planets. We note that planetary systems resembling our Solar system, formed around single stars in stellar clusters, may exchange into binaries and thus will be vulnerable to planet stripping. This process will reduce the number of Solar system-like planetary systems, and may produce at least some of the observed extrasolar planets. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
planetary, celestial mechanics, stellar dynamics, general, binaries, systems
in
Monthly Notices of the Royal Astronomical Society
volume
377
issue
1
pages
1 - 4
publisher
Wiley-Blackwell
external identifiers
  • wos:000246797900001
  • scopus:34250687964
ISSN
1365-2966
DOI
10.1111/j.1745-3933.2007.00291.x
language
English
LU publication?
yes
id
b831af2e-05ae-459f-ae2b-00fc63ea8937 (old id 657705)
date added to LUP
2007-12-13 15:36:02
date last changed
2017-01-22 03:36:04
@article{b831af2e-05ae-459f-ae2b-00fc63ea8937,
  abstract     = {In this Letter we consider the evolution of a planetary system around a star inside a wide binary. We simulate numerically the evolution of the planetary orbits for both coplanar and highly inclined systems. We find that the Kozai mechanism operates in the latter case. This produces a highly eccentric outer planet the orbit of which crosses those of some of the inner planets. Strong planet-planet interactions then follow, resulting in the ejection of one or more planets. We note that planetary systems resembling our Solar system, formed around single stars in stellar clusters, may exchange into binaries and thus will be vulnerable to planet stripping. This process will reduce the number of Solar system-like planetary systems, and may produce at least some of the observed extrasolar planets.},
  author       = {Malmberg, Daniel and Davies, Melvyn B and Chambers, John E.},
  issn         = {1365-2966},
  keyword      = {planetary,celestial mechanics,stellar dynamics,general,binaries,systems},
  language     = {eng},
  number       = {1},
  pages        = {1--4},
  publisher    = {Wiley-Blackwell},
  series       = {Monthly Notices of the Royal Astronomical Society},
  title        = {The instability of planetary systems in binaries: how the Kozai mechanism leads to strong planet-planet interactions},
  url          = {http://dx.doi.org/10.1111/j.1745-3933.2007.00291.x},
  volume       = {377},
  year         = {2007},
}