Forever alone? Testing single eccentric planetary systems for multiple companions
Article
Article Title | Forever alone? Testing single eccentric planetary systems for multiple companions |
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ERA Journal ID | 1058 |
Article Category | Article |
Authors | Wittenmyer, Robert A. (Author), Wang, Songhu (Author), Horner, Jonathan (Author), Tinney, C. G. (Author), Butler, R. P. (Author), Jones, H. R. A. (Author), O'Toole, S. J. (Author), Bailey, J. (Author), Carter, B. D. (Author), Salter, G. S. (Author), Wright, D. (Author) and Zhou, Ji-Lin (Author) |
Journal Title | Astrophysical Journal Supplement Series |
Journal Citation | 208 (1), pp. 1-16 |
Article Number | 2 |
Number of Pages | 16 |
Year | 2013 |
Publisher | IOP Publishing |
Place of Publication | United Kingdom |
ISSN | 0067-0049 |
1538-4365 | |
Digital Object Identifier (DOI) | https://doi.org/10.1088/0067-0049/208/1/2 |
Web Address (URL) | https://iopscience.iop.org/article/10.1088/0067-0049/208/1/2 |
Abstract | Determining the orbital eccentricity of an extrasolar planet is critically important for understanding the system's dynamical environment and history. However, eccentricity is often poorly determined or entirely mischaracterized due to poor observational sampling, low signal-to-noise, and/or degeneracies with other planetary signals. Some systems previously thought to contain a single, moderate-eccentricity planet have been shown, after further monitoring, to host two planets on nearly circular orbits. We investigate published apparent single-planet systems to see if the available data can be better fit by two lower-eccentricity planets. We identify nine promising candidate systems and perform detailed dynamical tests to confirm the stability of the potential new multiple-planet systems. Finally, we compare the expected orbits of the single- and double-planet scenarios to better inform future observations of these interesting systems. |
Keywords | planetary systems; radial velocities |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 510109. Stellar astronomy and planetary systems |
519999. Other physical sciences not elsewhere classified | |
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 |
Nanjing University, China | |
Carnegie Institution of Washington, United States | |
University of Hertfordshire, United Kingdom | |
Anglo-Australian Observatory, Australia | |
Centre for Astronomy, Solar Radiation and Climate | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q2155/forever-alone-testing-single-eccentric-planetary-systems-for-multiple-companions
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