Abstract
We report the discovery of WASP-4b, a large transiting gas-giant planet with an orbital period of 1.34 days. This is the first planet to be discovered by the SuperWASP-South observatory and CORALIE collaboration and the first planet orbiting a star brighter than 16th magnitude to be discovered in the southern hemisphere. A simultaneous fit to high-quality light curves and precision radial velocity measurements leads to a planetary mass of 1.22(-0.08)(+0.09) M-Jup and a planetary radius of 1.42(-0.04)(+0.07) R-Jup. The host star is USNO-B1.0 0479-0948995, a G7 V star of visual magnitude 12.5. As a result of the short orbital period, the predicted surface temperature of the planet is 1761 K, making it an ideal candidate for detections of the secondary eclipse at infrared wavelengths.
| Original language | English |
|---|---|
| Pages (from-to) | L113-L116 |
| Number of pages | 4 |
| Journal | Astrophysical Journal Letters |
| Volume | 675 |
| Issue number | 2 PART 2 |
| Publication status | Published - 2008 |
ASJC Scopus subject areas
- Space and Planetary Science
- Astronomy and Astrophysics