The curious case of HU Aquarii - dynamically testing proposed planetary systems
Paper
Paper/Presentation Title | The curious case of HU Aquarii - dynamically testing proposed planetary systems |
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Presentation Type | Paper |
Authors | Horner, Jonathan (Author), Wittenmyer, Robert A. (Author), Marshall, Jonathan P. (Author), Tinney, Chris G. (Author) and Butters, Oliver W. (Author) |
Editors | Short, Wayne and Cairns, Iver |
Journal or Proceedings Title | Proceedings of the 11th Australian Space Science Conference (ASSC 2011) |
Number of Pages | 14 |
Year | 2012 |
Place of Publication | Sydney, Australia |
ISBN | 9780977574056 |
Web Address (URL) of Paper | http://www.nssa.com.au/11assc/downloads/11ASSC-Proceedings-web.pdf |
Conference/Event | 11th Australian Space Science Conference (ASSC 2011) |
Event Details | 11th Australian Space Science Conference (ASSC 2011) Parent Australian Space Science Conference (ASSC) Delivery In person Event Date 26 to end of 29 Sep 2011 Event Location Canberra, Australia Sydney, Australia |
Abstract | In early 2011, the discovery of two planets moving on surprisingly extreme orbits around the eclipsing polar cataclysmic variable system HU Aquraii was announced based on variations in the timing of mutual eclipses between the two central stars. We perform a detailed dynamical analysis of the stability of the exoplanet system as proposed in that work, revealing that it is simply dynamically unfeasible. We then apply the latest rigorous methods used by the Anglo-Australian Planet Search to analyse radial velocity data to re-examine the data used to make the initial claim. Using that data, we arrive at a significantly different orbital solution for the proposed planets, which we then show through dynamical analysis to be equally unfeasible. Finally, we discuss the need for caution in linking eclipse-timing data for cataclysmic variables to the presence of planets, and suggest a more likely explanation for the observed signal. |
Keywords | planetary systems; HU Aquarii; dynamical methods; cataclysmic variable stars |
ANZSRC Field of Research 2020 | 510109. Stellar astronomy and planetary systems |
519999. Other physical sciences not elsewhere classified | |
Public Notes | Copyright © 2012 National Space Society of Australia Ltd. No evidence of copyright restrictions preventing deposit of Accepted version. |
Byline Affiliations | University of New South Wales |
Autonomous University of Madrid, Spain | |
University of Leicester, United Kingdom | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q4540/the-curious-case-of-hu-aquarii-dynamically-testing-proposed-planetary-systems
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