WASP-4b
 Size comparison of WASP-4b with Jupiter. | |
| Discovery | |
|---|---|
| Discovered by | David. M. Wilson et al. (SuperWASP)[1] |
| Discovery site | SAAO |
| Discovery date | October 31, 2007[2] |
| Transit | |
| Orbital characteristics | |
| 0.02255+0.00095 −0.00065[3] AU | |
| Eccentricity | 0.0[3] |
| 1.3382324+0.0000017 −0.0000029[3] d | |
| Inclination | 89.35+0.64 −0.49[3] |
| Semi-amplitude | 247.6+13.9 −6.8[3] |
| Star | WASP-4 |
| Physical characteristics | |
| 1.304+0.054 −0.042[3] RJ | |
| Mass | 1.21+0.13 −0.08[3] MJ |
| Temperature | 1900±100[4] |
WASP-4b is an extrasolar planet approximately 880 light-years away in the constellation of Phoenix.
The planet was the discovered by the SuperWASP project using cameras in South Africa.[5] After its discovery, the mass of the WASP-4 b was determined by measuring the radial velocity of WASP-4, which confirmed that the object that caused the transit was a planet.[1]
The equilibrium planetary temperature would be 1650±30 K,[3] but measured temperature is higher at 1900±100 K.[4]
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 -1+14
−12°.[6]
References
- ^ a b Wilson, D. M.; Gillon, M.; Hellier, C.; Maxted, P. F. L.; Pepe, F.; Queloz, D.; Anderson, D. R.; Collier Cameron, A.; Smalley, B.; Lister, T. A.; Bentley, S. J.; Blecha, A.; Christian, D. J.; Enoch, B.; Haswell, C. A.; Hebb, L.; Horne, K.; Irwin, J.; Joshi, Y. C.; Kane, S. R.; Marmier, M.; Mayor, M.; Parley, N.; Pollacco, D.; Pont, F.; Ryans, R.; Segransan, D.; Skillen, I.; Street, R. A.; Udry, S. (2008). "WASP-4b: A 12th Magnitude Transiting Hot Jupiter in the Southern Hemisphere". The Astrophysical Journal Letters. 675 (2): L113–L116. arXiv:0801.1509. Bibcode:2008ApJ...675L.113W. doi:10.1086/586735.
{{cite journal}}: Unknown parameter|displayauthors=ignored (|display-authors=suggested) (help) - ^ "Astronomer discovers new planets". BBC News. 2007-10-31. Retrieved 2018-09-23.
- ^ a b c d e f g h Table 3, Improved parameters for the transiting hot Jupiters WASP-4b and WASP-5b, M. Gillon et al., Astronomy and Astrophysics 496, #1 (2009), pp. 259–267, doi:10.1051/0004-6361:200810929, Bibcode:2009A&A...496..259G.
- ^ a b Zhou, G.; Bayliss, D. D. R.; Kedziora-Chudczer, L.; Tinney, C. G.; Bailey, J.; Salter, G.; Rodriguez, J. (2015). "Secondary eclipse observations for seven hot-Jupiters from the Anglo-Australian Telescope". Monthly Notices of the Royal Astronomical Society. 454 (3): 3002–3019. arXiv:1509.04147. Bibcode:2015MNRAS.454.3002Z. doi:10.1093/mnras/stv2138.
{{cite journal}}: CS1 maint: unflagged free DOI (link) - ^ Sherriff, Lucy (2007-10-31). "UK boffins ID three new exo-planets". The Register. Retrieved 2018-09-23.
- ^ Obliquities of Hot Jupiter host stars: Evidence for tidal interactions and primordial misalignments, 2012, arXiv:1206.6105
External links
Media related to WASP-4b at Wikimedia Commons
- "SuperWASP Homepage". Archived from the original on 2002-12-08. Retrieved 2008-07-02.
- "UK planet hunters announce three new finds" (PDF). 2007-10-30. Archived from the original (PDF) on 2008-05-16. Retrieved 2008-07-02.
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