Wobbling ancient binaries - here be planets?
Paper
Paper/Presentation Title | Wobbling ancient binaries - here be planets? |
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Presentation Type | Paper |
Authors | Horner, Jonathan (Author), Wittenmyer, Robert (Author), Hinse, Tobias (Author), Marshall, Jonathan (Author) and Mustill, Alex (Author) |
Editors | Short, Wayne and Cairns, Iver |
Journal or Proceedings Title | Proceedings of the 13th Australian Space Science Conference (ASSC 2013) |
Number of Pages | 14 |
Year | 2014 |
Place of Publication | Sydney, Australia |
ISBN | 9780977574070 |
Web Address (URL) of Paper | http://www.nssa.com.au/13assc/13assc-proceedings-web.pdf |
Conference/Event | 13th Australian Space Science Conference (ASSC 2013) |
Event Details | 13th Australian Space Science Conference (ASSC 2013) Parent Australian Space Science Conference (ASSC) Delivery In person Event Date 30 Sep 2013 to end of 02 Oct 2013 Event Location Sydney, Australia |
Abstract | In the last few years, a number of planets have been proposed to orbit several post main-sequence binary star systems on the basis of observed variations in the timing of eclipses between the binary components. A common feature of these planet candidates is that the best-fit orbits are often highly eccentric, such that the multiple planet systems proposed regularly feature mutually crossing orbits - a scenario that almost always leads to unstable planetary systems. In this work, we present the results of dynamical studies of all multiple-planet systems proposed to orbit these highly evolved binary stars, finding that most do not stand up to dynamical scrutiny. In one of the potentially stable cases (the NN Serpentis 2-planet system), we consider the evolution of the binary star system, and show that it is highly unlikely that planets could survive from the main sequence to obtain their current orbits - again casting doubt on the proposed planets. We conclude by considering alternative explanations for the observed variation in eclipse timings for these systems. |
Keywords | planetary systems, n-body simulation, dynamical evolution and stability, exoplanets, circumbinary companions |
ANZSRC Field of Research 2020 | 510109. Stellar astronomy and planetary systems |
519999. Other physical sciences not elsewhere classified | |
510101. Astrobiology | |
Public Notes | Copyright © 2014 National Space Society of Australia Ltd. |
Byline Affiliations | University of New South Wales |
Korea Astronomy and Space Science Institute, Korea | |
Autonomous University of Madrid, Spain | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q4537/wobbling-ancient-binaries-here-be-planets
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