WASP-3b
WASP-3b is an extrasolar planet orbiting the star WASP-3 located approximately 800 light-years away in the constellation Lyra. It was discovered via the transit method by SuperWASP, and follow up radial velocity observations confirmed that WASP-3b is a planet. The planet's mass and radius indicate that it is a gas giant with a similar bulk composition to Jupiter. WASP-3b has such an orbital distance around its star to classify it in the class of planets known as hot Jupiters and has an atmospheric temperature of approximately 1983 K.[1]
 Size comparison of WASP-3b with Jupiter. | |
| Discovery | |
|---|---|
| Discovered by | Pollacco et al. (SuperWASP) |
| Discovery site | ORM |
| Discovery date | October 31, 2007 |
| Transit | |
| Orbital characteristics | |
| 0.0317+0.0006 −0.001 AU | |
| Eccentricity | 0 |
| 1.8468372 ± 6e-07 d | |
| Inclination | 85.06+0.15 −0.16 |
| Star | WASP-3 |
| Physical characteristics | |
Mean radius | 1.454 ± 0.084 RJ |
| Mass | 2.06 ± 0.13 MJ |
Mean density | 1,040 kg/m3 (1,750 lb/cu yd) |
| 2.71 m/s2 (8.9 ft/s2) 26.6 g | |
| Temperature | 1983 |
WASP-3b undergoes no detectable gravitational tugging from other bodies in this system.[2]
The study in 2012, utilizing a Rossiter–McLaughlin effect, have determined the planetary orbit is probably aligned with the equatorial plane of the star, misalignment equal to 3.3+2.5
−4.4°.[3]
See also
References
- Pollacco, D.; et al. (2008). "WASP-3b: a strongly irradiated transiting gas-giant planet". Monthly Notices of the Royal Astronomical Society. 385 (3): 1576–1584. arXiv:0711.0126. Bibcode:2008MNRAS.385.1576P. doi:10.1111/j.1365-2966.2008.12939.x.
- M Montalto; et al. (Nov 2, 2012). "A new analysis of the WASP-3 system: no evidence for an additional companion". MNRAS. 427 (4): 2757. arXiv:1211.0218. Bibcode:2012MNRAS.427.2757M. doi:10.1111/j.1365-2966.2012.21926.x.
- Obliquities of Hot Jupiter host stars: Evidence for tidal interactions and primordial misalignments, 2012, arXiv:1206.6105
External links
