期刊
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
卷 109, 期 21, 页码 7982-7987出版社
NATL ACAD SCIENCES
DOI: 10.1073/pnas.1120970109
关键词
extrasolar planets; planet formation; planetary dynamics
资金
- National Aeronautics and Space Administration's (NASA) Science Mission Directorate
- NASA [NNX08AR04G, HF-51272.01-A, HF-51267.01-A]
- Space Telescope Science Institute
- Association of Universities for Research in Astronomy, Inc. [NAS 5-26555]
- NASA [95213, NNX08AR04G] Funding Source: Federal RePORTER
We present the results of a search for planetary companions orbiting near hot Jupiter planet candidates (Jupiter-size candidates with orbital periods near 3 d) identified in the Kepler data through its sixth quarter of science operations. Special emphasis is given to companions between the 2: 1 interior and exterior mean-motion resonances. A photometric transit search excludes companions with sizes ranging from roughly two-thirds to five times the size of the Earth, depending upon the noise properties of the target star. A search for dynamically induced deviations from a constant period (transit timing variations) also shows no significant signals. In contrast, comparison studies of warm Jupiters (with slightly larger orbits) and hot Neptune-size candidates do exhibit signatures of additional companions with these same tests. These differences between hot Jupiters and other planetary systems denote a distinctly different formation or dynamical history.
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