Spin-orbit alignment for three transiting hot Jupiters: WASP-103b, WASP-87b, and WASP-66b
Article
Article Title | Spin-orbit alignment for three transiting hot Jupiters: WASP-103b, WASP-87b, and WASP-66b |
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ERA Journal ID | 1057 |
Article Category | Article |
Authors | Addison, B. C. (Author), Tinney, C. G. (Author), Wright, D. J. (Author) and Bayliss, D. (Author) |
Journal Title | The Astrophysical Journal: an international review of astronomy and astronomical physics |
Journal Citation | 823 (29), pp. 1-16 |
Article Number | 29 |
Number of Pages | 17 |
Year | 2016 |
Publisher | IOP Publishing |
Place of Publication | United States |
ISSN | 0004-637X |
1538-4357 | |
Digital Object Identifier (DOI) | https://doi.org/10.3847/0004-637X/823/1/29 |
Web Address (URL) | https://iopscience.iop.org/article/10.3847/0004-637X/823/1/29/meta |
Abstract | We have measured the sky-projected spin-orbit alignments for three transiting hot Jupiters, WASP-103b, WASP-87b, and WASP-66b, using spectroscopic measurements of the Rossiter-McLaughlin effect, with the CYCLOPS2 optical fiber bundle system feeding the UCLES spectrograph on the Anglo-Australian Telescope. The resulting sky-projected spin-orbit angles of lambda = 3 degrees +/- 33 degrees, lambda- = -8 degrees +/- 11 degrees, and lambda- = -4 degrees +/- 22 degrees for WASP-103b, WASP-87b, and WASP-66b, respectively, suggest that these three planets are likely on nearly aligned orbits with respect to their host star's spin axis. WASP-103 is a particularly interesting system as its orbital distance is only 20% larger than its host star's Roche radius and the planet likely experiences strong tidal effects. WASP-87 and WASP-66 are hot (T-eff = 6450 +/- 120 K and T-eff = 6600 +/- 150 K, respectively) mid-F stars, making them similar to the majority of stars hosting planets on high-obliquity orbits. Moderate spin-orbit misalignments for WASP-103b and WASP-66b are consistent with our data, but polar and retrograde orbits are not favored for these systems. |
Keywords | planets and satellites dynamical evolution and stability, stars individual WASP-103, WASP-87, WASP-66, techniques radial velocities |
ANZSRC Field of Research 2020 | 510109. Stellar astronomy and planetary systems |
Byline Affiliations | University of New South Wales |
Australian National University | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q53q2/spin-orbit-alignment-for-three-transiting-hot-jupiters-wasp-103b-wasp-87b-and-wasp-66b
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