Spin-orbit misalignments of three Jovian planets via doppler tomography
Article
Article Title | Spin-orbit misalignments of three Jovian planets via doppler tomography |
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ERA Journal ID | 1048 |
Article Category | Article |
Authors | Johnson, Marshall C. (Author), Cochran, William D. (Author), Addison, Brett C. (Author), Tinney, Chris G. (Author) and Wright, Duncan J. (Author) |
Journal Title | The Astronomical Journal |
Journal Citation | 154 (4) |
Article Number | 137 |
Number of Pages | 12 |
Year | 2017 |
Publisher | IOP Publishing |
Place of Publication | United States |
ISSN | 0004-6256 |
1538-3881 | |
Digital Object Identifier (DOI) | https://doi.org/10.3847/1538-3881/aa8462 |
Web Address (URL) | https://iopscience.iop.org/article/10.3847/1538-3881/aa8462 |
Abstract | We present measurements of the spin-orbit misalignments of the hot Jupiters HAT-P-41 b and WASP-79 b, and the aligned warm Jupiter Kepler-448 b. We obtain these measurements with Doppler tomography, where we spectroscopically resolve the line profile perturbation during the transit due to the Rossiter-McLaughlin effect. We analyze time series spectra obtained during portions of five transits of HAT-P-41. b, and find a value of the spin-orbit misalignment of lambda = -22.1(-6.0)(+0.8)degrees. We reanalyze the radial velocity Rossiter-McLaughlin data on WASP-79. b obtained by Addison et al. using Doppler tomographic methodology. We measure lambda = -99.1(-3.9)(+4.1)degrees, consistent with but more precise than the value found by Addison et al. For Kepler-448. b we perform a joint fit to the Kepler light curve, Doppler tomographic data, and a radial velocity data set from Lillo-Box et al. We find an approximately aligned orbit (lambda = -7.1(-2.8)(+4.2)degrees), in agreement with the value found by Bourrier et al. Through analysis of the Kepler light curve we measure a stellar rotation period of P-rot = 1.27 +/- 0.11 days, and use this to argue that the full three-dimensional spin-orbit misalignment is small, psi similar to 0 degrees. |
Keywords | line profiles, planetary systems, planets and satellites individual: HAT-P-41 b, Kepler-448 b, WASP-79 b, techniques spectroscopic |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 510109. Stellar astronomy and planetary systems |
Public Notes | For access to this article, please click on the URL link provided. |
Byline Affiliations | University of Texas, United States |
University of Texas at Austin, United States | |
Mississippi State University, United States | |
University of New South Wales | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q53qy/spin-orbit-misalignments-of-three-jovian-planets-via-doppler-tomography
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