Orbital Elements of visual binary stars with very short arcs: With application to double stars from the 1829 southern double star catalog of James Dunlop
Article
Article Title | Orbital Elements of visual binary stars with very short arcs: |
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ERA Journal ID | 1049 |
Article Category | Article |
Authors | Letchford, Roderick R. (Author), White, Graeme L. (Author) and Brown, Carolyn J. (Author) |
Journal Title | Astronomische Nachrichten |
Journal Citation | 343 (3), pp. 1-13 |
Number of Pages | 13 |
Year | 2022 |
Publisher | John Wiley & Sons |
Place of Publication | Germany |
ISSN | 0004-6337 |
1521-3994 | |
Digital Object Identifier (DOI) | https://doi.org/10.1002/asna.20210113 |
Web Address (URL) | https://onlinelibrary.wiley.com/doi/full/10.1002/asna.20210113 |
Abstract | Binary double stars are those whose binding energies are less than zero. Obtaining binary star orbits from short arcs has been a long-standing problem in astrophysics. A method is presented and tested here, which addresses the problem by using space-based astrometry, photometry, and astrophysical data, together with historic measures, to generate and constrain a range of possible first-order Grade 5 orbits. After testing the method on an established binary star, we apply the method to eight double stars from the first published catalog of southern double stars, that of Dunlop (1829) and generate orbits for five. The mean orbital period is ∼81,000 years, and the mean semi-major axis is ∼76″ with a typical uncertainty of the Orbital Elements of ∼37%. Their Orbital Elements and associated plots are also presented. |
Keywords | astrometry, binaries: visual – celestial mechanics, stars: kinematics |
ANZSRC Field of Research 2020 | 510199. Astronomical sciences not elsewhere classified |
510109. Stellar astronomy and planetary systems | |
Byline Affiliations | Centre for Astrophysics |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q7x16/orbital-elements-of-visual-binary-stars-with-very-short-arcs-with-application-to-double-stars-from-the-1829-southern-double-star-catalog-of-james-dunlop
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