Resonances required: dynamical analysis of the 24 sex and HD 200964 planetary systems
Article
Article Title | Resonances required: dynamical analysis of the 24 sex and HD 200964 planetary systems |
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ERA Journal ID | 1057 |
Article Category | Article |
Authors | Wittenmyer, Robert A. (Author), Horner, Jonathan (Author) and Tinney, C. G. (Author) |
Journal Title | The Astrophysical Journal: an international review of astronomy and astronomical physics |
Journal Citation | 761 (2), pp. 1-6 |
Article Number | 165 |
Number of Pages | 6 |
Year | 2012 |
Publisher | IOP Publishing |
Place of Publication | United States |
ISSN | 0004-637X |
1538-4357 | |
Digital Object Identifier (DOI) | https://doi.org/10.1088/0004-637X/761/2/165 |
Web Address (URL) | https://iopscience.iop.org/article/10.1088/0004-637X/761/2/165 |
Abstract | We perform several suites of highly detailed dynamical simulations to investigate the architectures of the 24 Sextantis and HD 200964 planetary systems. The best-fit orbital solution for the two planets in the 24 Sex system places them on orbits with periods that lie very close to 2:1 commensurability, while that for the HD 200964 system places the two planets therein in orbits whose periods lie close to a 4:3 commensurability. In both cases, the proposed best-fit orbits are mutually crossing - a scenario that is only dynamically feasible if the planets are protected from close encounters by the effects of mutual mean-motion resonance (MMR). Our simulations reveal that the best-fit orbits for both systems lie within narrow islands of dynamical stability, and are surrounded by much larger regions of extreme instability. As such, we show that the planets are only feasible if they are currently trapped in mutual MMR - the 2:1 resonance in the case of 24 Sex b and c, and the 4:3 resonance in the case of HD 200964 b and c. In both cases, the region of stability is strongest and most pronounced when the planetary orbits are mutually coplanar. As the inclination of planet c with respect to planet b is increased, the stability of both systems rapidly collapses. |
Keywords | numerical; planetary systems; planets and satellites; 24 Sex b; 24 Sex c; HD 200964b; HD 200964c; 24 Sextantis; HD 200964 |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 510109. Stellar astronomy and planetary systems |
460207. Modelling and simulation | |
490105. Dynamical systems in applications | |
Public Notes | For access to this article, please click on the URL link provided. |
Byline Affiliations | University of New South Wales |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q2714/resonances-required-dynamical-analysis-of-the-24-sex-and-hd-200964-planetary-systems
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