Warm Jupiters Are Less Lonely than Hot Jupiters: Close Neighbors
Article
Article Title | Warm Jupiters Are Less Lonely than Hot Jupiters: Close Neighbors |
---|---|
ERA Journal ID | 1057 |
Article Category | Article |
Authors | Huang, Chelsea (Author), Wu, Yanqin (Author) and Triaud, Amaury H. M. J. (Author) |
Journal Title | The Astrophysical Journal: an international review of astronomy and astronomical physics |
Journal Citation | 825 (2), pp. 1-10 |
Article Number | 98 |
Number of Pages | 10 |
Year | 2016 |
Publisher | IOP Publishing |
Place of Publication | United States |
ISSN | 0004-637X |
1538-4357 | |
Digital Object Identifier (DOI) | https://doi.org/10.3847/0004-637x/825/2/98 |
Web Address (URL) | https://iopscience.iop.org/article/10.3847/0004-637X/825/2/98 |
Abstract | Exploiting the Kepler transit data, we uncover a dramatic distinction in the prevalence of sub-Jovian companions between systems that contain hot Jupiters (HJs) (periods inward of 10 days) and those that host warm Jupiters (WJs) (periods between 10 and 200 days). HJs, with the singular exception of WASP-47b, do not have any detectable inner or outer planetary companions (with periods inward of 50 days and sizes down to 2 R Earth). Restricting ourselves to inner companions, our limits reach down to 1 R Earth. In stark contrast, half of the WJs are closely flanked by small companions. Statistically, the companion fractions for hot and WJs are mutually exclusive, particularly in regard to inner companions. The high companion fraction of WJs also yields clues to their formation. The WJs that have close-by siblings should have low orbital eccentricities and low mutual inclinations. The orbital configurations of these systems are reminiscent of those of the low-mass close-in planetary systems abundantly discovered by the Kepler mission. This, and other arguments, lead us to propose that these WJs are formed in situ. There are indications that there may be a second population of WJs with different characteristics. In this picture, WASP-47b could be regarded as the extending tail of the in situ WJs into the HJ region and does not represent the generic formation route for HJs. |
Keywords | methods: statistical; planets and satellites: general; Astrophysics - Earth and Planetary Astrophysics |
ANZSRC Field of Research 2020 | 510109. Stellar astronomy and planetary systems |
Byline Affiliations | University of Toronto, Canada |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q7258/warm-jupiters-are-less-lonely-than-hot-jupiters-close-neighbors
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