The Pan-Pacific Planet Search - VIII. Complete results and the occurrence rate of planets around low-luminosity giants
Article
Article Title | The Pan-Pacific Planet Search - VIII. Complete results and the occurrence rate of planets around low-luminosity giants |
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ERA Journal ID | 1074 |
Article Category | Article |
Authors | Wittenmyer, Robert A. (Author), Butler, R. P. (Author), Horner, Jonathan (Author), Clark, Jake (Author), Tinney, C. G. (Author), Carter, B. D. (Author), Wang, Liang (Author), Johnson, John Asher (Author) and Collins, Michaela (Author) |
Journal Title | Monthly Notices of the Royal Astronomical Society |
Journal Citation | 491 (4), pp. 5248-5257 |
Number of Pages | 10 |
Year | 2020 |
Publisher | Oxford University Press |
Place of Publication | United Kingdom |
ISSN | 0035-8711 |
1365-2966 | |
Digital Object Identifier (DOI) | https://doi.org/10.1093/mnras/stz3378 |
Web Address (URL) | https://academic.oup.com/mnras/article/491/4/5248/5652201 |
Abstract | Our knowledge of the populations and occurrence rates of planets orbiting evolved intermediate-mass stars lags behind that for solar-type stars by at least a decade. Some radial velocity surveys have targeted these low-luminosity giant stars, providing some insights into the properties of their planetary systems. Here, we present the final data release of the Pan-Pacific Planet Search (PPPS), a 5 yr radial velocity survey using the 3.9 m Anglo-Australian Telescope. We present 1293 precise radial velocity measurements for 129 stars, and highlight 6 potential substellar-mass companions, which require additional observations to confirm. Correcting for the substantial incompleteness in the sample, we estimate the occurrence rate of giant planets orbiting low-luminosity giant stars to be approximately 7.8^{+9.1}_{-3.3} per cent. This result is consistent with the frequency of such planets found to orbit main-sequence A-type stars, from which the PPPS stars have evolved. |
Keywords | techniques: radial velocities; planets and satellites: detection; Astrophysics - Earth and Planetary Astrophysics; Astrophysics - Solar; and Stellar Astrophysics |
ANZSRC Field of Research 2020 | 510109. Stellar astronomy and planetary systems |
Public Notes | This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2020 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved. |
Byline Affiliations | Centre for Astrophysics |
Carnegie Institution of Washington, United States | |
University of New South Wales | |
Key Laboratory of Optical Astronomy, China | |
Center for Astrophysics Harvard and Smithsonian, United States | |
Kutztown University, United States | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q5x11/the-pan-pacific-planet-search-viii-complete-results-and-the-occurrence-rate-of-planets-around-low-luminosity-giants
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