Doppler monitoring of the WASP-47 multiplanet system
Article
Article Title | Doppler monitoring of the WASP-47 multiplanet system |
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ERA Journal ID | 45091 |
Article Category | Article |
Authors | Dai, Fei (Author), Winn, Joshua N. (Author), Arriagada, Pamela (Author), Butler, R. Paul (Author), Crane, Jeffrey D. (Author), Johnson, John Asher (Author), Shectman, Stephen A. (Author), Teske, Johanna K. (Author), Thompson, Ian B. (Author), Vanderburg, Andrew (Author) and Wittenmyer, Robert A. (Author) |
Journal Title | The Astrophysical Journal Letters |
Journal Citation | 813 (1) |
Number of Pages | 6 |
Year | 2015 |
Publisher | IOP Publishing |
Place of Publication | United Kingdom |
ISSN | 2041-8205 |
2041-8213 | |
Digital Object Identifier (DOI) | https://doi.org/10.1088/2041-8205/813/1/L9 |
Web Address (URL) | http://iopscience.iop.org/article/10.1088/2041-8205/813/1/L9 |
Abstract | We present precise Doppler observations of WASP-47, a transiting planetary system featuring a hot Jupiter with both inner and outer planetary companions. This system has an unusual architecture and also provides a rare opportunity to measure planet masses in two different ways: the Doppler method, and the analysis of transit-timing variations (TTV). Based on the new Doppler data, obtained with the Planet Finder Spectrograph on the Magellan/Clay 6.5 m telescope, the mass of the hot Jupiter is 370+/- 29M⊕. This is consistent with the previous Doppler determination as well as the TTV determination. For the inner planet WASP-47e, the Doppler data lead to a mass of 12.2 +/-3.7 M⊕ in agreement with the TTV-based upper limit of <22 M⊕ (95% confidence). For the outer planet WASP-47d, the Doppler mass constraint of 10.4 +/- 8.4 M⊕ is consistent with the TTV-based measurement of 15.2 -7.6 to +6.7 M⊕ |
Keywords | planetary systems; planets and satellites; composition; individual stars(WASP-47); techniques; radial velocities; |
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 | Massachusetts Institute of Technology, United States |
Carnegie Institution of Washington, United States | |
Center for Astrophysics Harvard and Smithsonian, United States | |
Carnegie Observatories Pasadena, United States | |
University of New South Wales | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q41qw/doppler-monitoring-of-the-wasp-47-multiplanet-system
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