期刊
ASTRONOMY & ASTROPHYSICS
卷 534, 期 -, 页码 -出版社
EDP SCIENCES S A
DOI: 10.1051/0004-6361/201117713
关键词
binaries: eclipsing; planetary systems; planets and satellites: dynamical evolution and stability; planet-star interactions
资金
- Swiss Fond National de Recherche Scientifique
Via the Rossiter-McLaughlin effect, it is possible to measure the sky-projected angle between the stellar spin and a planet's orbital spin. Observed orbital inclinations have been found to range over all possible angles. A tentative detection of a correlation between the dispersion in spin/orbit angle and the youth of the system is revealed, using spin/orbit measurements for hot Jupiters around stars with masses >= 1.2 M-circle dot for which age estimates are more accurately determined. The probability of this pattern arising by chance has been computed to be 7%. This appears in accordance with tidal dissipation, where non-coplanar hot Jupiters' orbits tidally realign. The results suggest they realign within about 2.5 Gyr. For the sample considered, the results imply that hot Jupiters are placed on non-coplanar orbits early in their history rather than late. The events producing these orbits could involve strong planet-planet scattering.
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