Abstract
We present z-band photometry of three consecutive transits of the exoplanet TrES-1, with an accuracy of 0.15% and a cadence of 40 s. We improve on estimates of the system parameters, finding in particular that the planetary radius is 1.081 ± 0.029 RJup and the stellar radius is 0.811 ±0.020 R⊙ The uncertainties include both the statistical error and the systematic error arising from the uncertainty in the stellar mass. The transit times are determined to within about 15 s and allow us to refine the estimate of the mean orbital period: P = 3.0300737 ± 0.0000026 days. We find no evidence for starspots or other irregularities that have been previously reported.
Original language | English (US) |
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Pages (from-to) | 1098-1106 |
Number of pages | 9 |
Journal | Astrophysical Journal |
Volume | 657 |
Issue number | 2 I |
DOIs | |
State | Published - Mar 10 2007 |
Externally published | Yes |
All Science Journal Classification (ASJC) codes
- Astronomy and Astrophysics
- Space and Planetary Science
Keywords
- Planetary systems
- Stars: individual (TrES-1)
- Techniques: photometric