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On the Dynamical Evolution of Scattered Disk Objects Outside the Planetary System
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Theoretical Astrophysics.
2010 (English)In: Acta Astronomica, ISSN 0001-5237, Vol. 60, no 4, 373-385 p.Article in journal (Refereed) Published
Abstract [en]

We report the results of dynamical simulations, covering Gyr timescales, of fictitious Scattered Disk Objects as a follow-up to an earlier study. Our dynamical model is similar in that it does not include external agents like passing stars or the Galactic tide. Only the four giant planets are explicitly treated as perturbers. We analyze the random-walk behavior of the inverse semi-major axis by means of a simplified circular restricted 3-body problem as an approximate analogue. Our results concerning the role of resonant effects and the transfer efficiency into the orbital energy domain of the inner Oort Cloud are in broad agreement with the earlier papers, and we confirm the important role of external objects (with perihelia beyond Neptune's orbit) in feeding the Oort Cloud. We estimate the efficiency of this transfer to be even somewhat higher than previously found.

Place, publisher, year, edition, pages
2010. Vol. 60, no 4, 373-385 p.
Keyword [en]
Kuiper-Belt, general, Oort Cloud, Celestial mechanics, Methods, numerical
National Category
Physical Sciences
URN: urn:nbn:se:uu:diva-148170ISI: 000286780100005OAI: oai:DiVA.org:uu-148170DiVA: diva2:401472
Available from: 2011-03-02 Created: 2011-03-02 Last updated: 2012-10-11Bibliographically approved

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