Making Extrasolar Planets From Solar Systems Via Dynamical Interactions

Daniel Malmberg, Melvyn B Davies

    Forskningsoutput: Kapitel i bok/rapport/Conference proceedingKonferenspaper i proceedingPeer review

    Sammanfattning

    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.
    Originalspråkengelska
    Titel på värdpublikationExtrasolar Planets In Multi-Body Systems: Theory And Observations
    FörlagEDP Sciences
    Sidor375-383
    Volym42
    DOI
    StatusPublished - 2010
    EvenemangInternational Conference on Extrasolar Planets in Multi-Body Systems: Theory and Observations - Torun, Polen
    Varaktighet: 2008 aug. 252008 aug. 29

    Publikationsserier

    Namn
    Volym42
    ISSN (tryckt)1638-1963
    ISSN (elektroniskt)1633-4760

    Konferens

    KonferensInternational Conference on Extrasolar Planets in Multi-Body Systems: Theory and Observations
    Land/TerritoriumPolen
    OrtTorun
    Period2008/08/252008/08/29

    Ämnesklassifikation (UKÄ)

    • Astronomi, astrofysik och kosmologi

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