Influence of stellar multiplicity on planet formation. IV. Adaptive optics imaging of Kepler stars with multiple transiting planet candidates
Article
Article Title | Influence of stellar multiplicity on planet formation. IV. Adaptive optics imaging of Kepler stars with multiple transiting planet candidates |
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ERA Journal ID | 1057 |
Article Category | Article |
Authors | Wang, Ji (Author), Fischer, Debra A. (Author), Xie, Ji Wei (Author) and Ciardi, David R. (Author) |
Journal Title | The Astrophysical Journal: an international review of astronomy and astronomical physics |
Journal Citation | 813 (2), pp. 130-144 |
Article Number | 130 |
Number of Pages | 15 |
Year | 2015 |
Publisher | IOP Publishing |
Place of Publication | United States |
ISSN | 0004-637X |
1538-4357 | |
Digital Object Identifier (DOI) | https://doi.org/10.1088/0004-637X/813/2/130 |
Web Address (URL) | http://iopscience.iop.org/article/10.1088/0004-637X/813/2/130 |
Abstract | The Kepler mission provides a wealth of multiple transiting planet systems (MTPSs). The formation and evolution of multi-planet systems are likely to be influenced by companion stars given the abundance of multiple stellar systems. We study the influence of stellar companions by measuring the stellar multiplicity rate of MTPSs. We select 138 bright (KP < 13.5) Kepler MTPSs and search for stellar companions with adaptive optics (AO) imaging data and archival radial velocity data. We obtain new AO images for 73 MTPSs. Other MTPSs in the sample have archival AO imaging data from the Kepler Community Follow-up Observation Program. From these imaging data, we detect 42 stellar companions around 35 host stars. For stellar separation 1 AU < a < 100 AU, the stellar multiplicity rate is 5.2 ± 5.0% for MTPSs, which is 2.8σ lower than 21.1 ± 2.8% for the control sample, i.e., the field stars in the solar neighborhood. We identify two origins for the deficit of stellar companions within 100 AU of MTPSs: (1) a suppressive planet formation and (2) the disruption of orbital coplanarity due to stellar companions. To distinguish between the two origins, we compare the stellar multiplicity rates of MTPSs and single transiting planet systems (STPSs). However, current data are not sufficient for this purpose. For 100 AU < a < 2000 AU, the stellar multiplicity rates are comparable for MTPSs (8.0 ± 4.0%), STPSs (6.4 ± 5.8%), and the control sample (12.5 ± 2.8%). |
Keywords | methods: observational; planetary systems; planets and satellites: dynamical evolution and stability; planets and satellites: formation; planetstar interactions; techniques: high angular resolution; |
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 |
Massey University, New Zealand | |
Nanjing University, China | |
National Aeronautics and Space Administration (NASA), United States | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q42zv/influence-of-stellar-multiplicity-on-planet-formation-iv-adaptive-optics-imaging-of-kepler-stars-with-multiple-transiting-planet-candidates
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