Mass constraints of the WASP-47 planetary system from radial velocities
Article
Article Title | Mass constraints of the WASP-47 planetary system from radial velocities |
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ERA Journal ID | 1048 |
Article Category | Article |
Authors | Sinukoff, Evan (Author), Howard, Andrew W. (Author), Petigura, Erik A. (Author), Fulton, Benjamin J. (Author), Isaacson, Howard (Author), Weiss, Lauren M. (Author), Brewer, John M. (Author), Hansen, Brad M. S. (Author), Hirsch, Lea (Author), Christiansen, Jessie L. (Author), Crepp, Justin R. (Author), Crossfield, Ian J. M. (Author), Schlieder, Joshua E. (Author), Ciardi, David R. (Author), Beichman, Charles A. (Author), Knutson, Heather A. (Author), Benneke, Bjoern (Author), Dressing, Courtney D. (Author), Livingston, John H. (Author), Deck, Katherine M. (Author), Lepine, Sebastien (Author) and Rogers, Leslie A. (Author) |
Journal Title | The Astronomical Journal |
Journal Citation | 153 (2) |
Article Number | 70 |
Number of Pages | 8 |
Year | 2017 |
Publisher | IOP Publishing |
Place of Publication | United States |
ISSN | 0004-6256 |
1538-3881 | |
Digital Object Identifier (DOI) | https://doi.org/10.3847/1538-3881/153/2/70 |
Web Address (URL) | https://iopscience.iop.org/article/10.3847/1538-3881/153/2/70 |
Abstract | We report precise radial velocity (RV) measurements of WASP-47, a G star that hosts three transiting planets in close proximity (a hot Jupiter, a super-Earth, and a Neptune-sized planet) and a non-transiting planet at 1.4 au. Through a joint analysis of previously published RVs and our own Keck-HIRES RVs, we significantly improve the planet mass and bulk density measurements. For the super-Earth WASP-47e (P = 0.79 days), we measure a mass of 9.11 ± 1.17 Ṁ, and a bulk density of 7.63 ± 1.90 g cm-3, consistent with a rocky composition. For the hot Jupiter WASP-47b (P = 4.2 days), we measure a mass of 356 ± 12Ṁ(1.12 ± 0.04 MJup) and constrain its eccentricity to at 3σ confidence. For the Neptune-size planet WASP-47d (P = 9.0 days), we measure a mass of 12.75 ± 50.0 and a bulk density of g cm-3, suggesting that it has a thick H/He envelope. For the outer non-transiting planet, we measure a minimum mass of 411 ±18Ṁ(1.29 ± 0.06 MJup), an orbital period of days, and an orbital eccentricity of . Our new measurements are consistent with but two to four times more precise than previous mass measurements. |
Keywords | planetary systems; planets and satellites: detection; dynamical evolution and stability; |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 519999. Other physical sciences not elsewhere classified |
Public Notes | For access to this article, please click on the URL link provided. |
Byline Affiliations | University of Hawaii, United States |
California Institute of Technology (Caltech), United States | |
University of California, United States | |
University of Montreal, Canada | |
Yale University, United States | |
University of Notre Dame, United States | |
University of Tokyo, Japan | |
Georgia State University, United States | |
University of Chicago, United States | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q42yq/mass-constraints-of-the-wasp-47-planetary-system-from-radial-velocities
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