期刊
ASTRONOMICAL JOURNAL
卷 157, 期 6, 页码 -出版社
IOP Publishing Ltd
DOI: 10.3847/1538-3881/ab189f
关键词
binaries: close; planets and satellites: individual (WASP-4b, WASP-5b, WASP-6b, WASP-12b, WASP-18b, WASP-46b); planet-star interactions
资金
- Guest Investigator program [G011112, G011183]
- TESS project
- Heising-Simons Foundation
- MIT's Kavli Institute
- European Research Council (ERC) under the European Union [679633]
- NWO TOP Grant Module 2 [614.001.601]
- Harvard Future Faculty Leaders Postdoctoral Fellowship
- NASA's Science Mission directorate
- National Aeronautics and Space Administration
- European Research Council (ERC) [679633] Funding Source: European Research Council (ERC)
The Transiting Exoplanet Survey Satellite (TESS) recently observed 18 transits of the hot Jupiter WASP-4b. The sequence of transits occurred 81.6 +/- 11.7 s earlier than had been predicted, based on data stretching back to 2007. This is unlikely to be the result of a clock error, because TESS observations of other hot Jupiters (WASP-6b, 18b, and 46b) are compatible with a constant period, ruling out an 81.6 s offset at the 6.4 sigma level. The 1.3 day orbital period of WASP-4b appears to be decreasing at a rate of (P) over dot = -12.6 +/- 1.2 ms per year. The apparent period change might be caused by tidal orbital decay or apsidal precession, although both interpretations have shortcomings. The gravitational influence of a third body is another possibility, though at present there is minimal evidence for such a body. Further observations are needed to confirm and understand the timing variation.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据