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WASP-4b: a 12th-magnitude transiting hot-Jupiter in the Southern hemisphere

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.; West, R. G. and Wheatley, P. J. (2008). WASP-4b: a 12th-magnitude transiting hot-Jupiter in the Southern hemisphere. Astrophysical Journal Letters, 675 L113-L116.

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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+0.09-0.08 MJup and a planetary radius of 1.42+0.07-0.04 RJup. 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.

Item Type: Journal Item
Copyright Holders: 2008. The American Astronomical Society.
ISSN: 2041-8213
Extra Information: Click here to view other publications available on this repository relating to the SuperWASP Project.
Keywords: planetary systems
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Physical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Item ID: 10770
Depositing User: Astrid Peterkin
Date Deposited: 28 May 2008
Last Modified: 07 Dec 2018 10:15
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