Stellar Spin-Orbit Alignment for Kepler-9, a Multi-transiting Planetary System with Two Outer Planets Near 2:1 Resonance
Article
Article Title | Stellar Spin-Orbit Alignment for Kepler-9, a Multi-transiting Planetary System with Two Outer Planets Near 2:1 Resonance |
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ERA Journal ID | 1048 |
Article Category | Article |
Authors | Wang, Songhu (Author), Addison, Brett (Author), Fischer, Debra A. (Author), Brewer, John M. (Author), Isaacson, Howard (Author), Howard, Andrew W. (Author) and Laughlin, Gregory (Author) |
Journal Title | The Astronomical Journal |
Journal Citation | 155 (2), pp. 1-6 |
Article Number | 70 |
Number of Pages | 6 |
Year | 2018 |
Publisher | IOP Publishing |
Place of Publication | United States |
ISSN | 0004-6256 |
1538-3881 | |
Digital Object Identifier (DOI) | https://doi.org/10.3847/1538-3881/aaa2fb |
Web Address (URL) | https://iopscience.iop.org/article/10.3847/1538-3881/aaa2fb |
Abstract | We present spectroscopic measurements of the Rossiter-McLaughlin effect for the planet b of the Kepler-9 multi-transiting planetary system. The resulting sky-projected spin-orbit angle is λ = -13° ± 16°, which favors an aligned system and strongly disfavors highly misaligned, polar, and retrograde orbits. Including Kepler-9, there are now a total of four Rossiter-McLaughlin effect measurements for multiplanet systems, all of which are consistent with spin-orbit alignment. |
Keywords | methods: observational; planetary systems; planets and satellites:; individual: Kepler-9b; stars: individual: Kepler-9; techniques: radial; velocities; techniques: spectroscopic; Astrophysics - Earth and; Planetary Astrophysics |
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 | Yale University, United States |
Mississippi State University, United States | |
Massey University, New Zealand | |
University of California, United States | |
California Institute of Technology (Caltech), United States | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q6130/stellar-spin-orbit-alignment-for-kepler-9-a-multi-transiting-planetary-system-with-two-outer-planets-near-2-1-resonance
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