 Size comparison of WASP-14b with Jupiter. | |
| Discovery | |
|---|---|
| Discovered by | Cameron et al. (SuperWASP) |
| Discovery site | SAAO |
| Discovery date | April 1, 2008 |
| Detection method | Transit |
| Orbital characteristics | |
| Semi-major axis | 0.037 −0.002 AU |
| Eccentricity | 0.095 −0.007 |
| Orbital period (sidereal) | 2.243756 −1E-6 d |
| Inclination | 84.79 −0.67 |
| Argument of periastron | 254.9 −1.72 |
| Star | WASP-14 |
| Physical characteristics | |
| Mean radius | 1.259 −0.058 RJ |
| Mass | 7.725 −0.67 MJ |
| Mean density | 5.133 g/cm |
| Surface gravity | 126.2 m/s (414 ft/s) 12.87 g |
| Temperature | 2800 |
WASP-14b is an extrasolar planet discovered in 2008 by SuperWASP using the transit method. Follow-up radial velocity measurements showed that the mass of WASP-14b is almost eight times larger than that of Jupiter. The radius found by the transit observations show that it has a radius 25% larger than Jupiter. This makes WASP-14b one of the densest exoplanets known. Its radius best fits the model of Jonathan Fortney.
Orbit
First calculation of WASP-14b's Rossiter–McLaughlin effect and so spin-orbit angle was −14 ± 17 degrees. It is too eccentric for its age and so is possibly pulled into its orbit by another planet. The study in 2012 has updated spin-orbit angle to 33.1±7.4°.
References
- ^ Joshi, Y. C.; et al. (2008). "WASP-14b: A 7.7 Mjup transiting exoplanet in an eccentric orbit". Monthly Notices of the Royal Astronomical Society. 392 (4): 1532–1538. arXiv:0806.1478. Bibcode:2009MNRAS.392.1532J. doi:10.1111/j.1365-2966.2008.14178.x. S2CID 7775011.
- Fortney; Marley, M. S.; Barnes, J. W. (2007). "Planetary Radii across Five Orders of Magnitude in Mass and Stellar Insolation: Application to Transits". The Astrophysical Journal. 659 (2): 1661–1672. arXiv:astro-ph/0612671. Bibcode:2007ApJ...659.1661F. doi:10.1086/512120. S2CID 3039909.
- Winn, Joshua N. (2008). "Measuring accurate transit parameters". Proceedings of the International Astronomical Union. 4: 99–109. arXiv:0807.4929v2. Bibcode:2009IAUS..253...99W. doi:10.1017/S174392130802629X. S2CID 34144676.
- Albrecht, Simon; Winn, Joshua N.; Johnson, John A.; Howard, Andrew W.; Marcy, Geoffrey W.; Butler, R. Paul; Arriagada, Pamela; Crane, Jeffrey D.; Shectman, Stephen A.; Thompson, Ian B.; Hirano, Teruyuki; Bakos, Gaspar; Hartman, Joel D. (2012), "Obliquities of Hot Jupiter Host Stars: Evidence for Tidal Interactions and Primordial Misalignments", The Astrophysical Journal, 757 (1): 18, arXiv:1206.6105, Bibcode:2012ApJ...757...18A, doi:10.1088/0004-637X/757/1/18, S2CID 17174530
External links
Media related to WASP-14b at Wikimedia Commons
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