Abstract
We monitored the Doppler shift of the G0 V star TrES-2 throughout a transit of its giant planet. The anomalous Doppler shift due to stellar rotation (the Rossiter-McLaughlin effect) is discernible in the data, with a signal-to-noise ratio of 2.9, even though the star is a slow rotator. By modeling this effect we find that the planet's trajectory across the face of the star is tilted by -9° ± 12° relative to the projected stellar equator. With 98% confidence, the orbit is prograde.
Original language | English (US) |
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Pages (from-to) | 1283-1288 |
Number of pages | 6 |
Journal | Astrophysical Journal |
Volume | 682 |
Issue number | 2 |
DOIs | |
State | Published - Aug 1 2008 |
All Science Journal Classification (ASJC) codes
- Astronomy and Astrophysics
- Space and Planetary Science
Keywords
- Planetary systems
- Planetary systems: Formation
- Stars: Individual (GSC 03549-02811, TrES-2)
- Stars: Rotation