WASP-4b: A 12th magnitude transiting hot Jupiter in the southern hemisphere
- Creators
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Wilson, D. M.
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Gillon, M.
- Hellier, C.
- Maxted, P. F. L.
- Pepe, F.
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Queloz, D.
- Anderson, D. R.
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Collier Cameron, A.
- Smalley, B.
- Lister, T. A.
- Bentley, S. J.
- Blecha, A.
- Christian, D. J.
- Enoch, B.
- Haswell, C. A.
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Hebb, L.
- Horne, K.
- Irwin, J.
- Joshi, Y. C.
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Kane, S. R.
- Marmier, M.
- Mayor, M.
- Parley, N.
- Pollacco, D.
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Pont, F.
- Ryans, R.
- Segransan, D.
- Skillen, I.
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Street, R. A.
- Udry, S.
- West, R. G.
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Wheatley, P. J.
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^(+0.09)_(−0.08) M_(Jup) and a planetary radius of 1.42^(+0.07)_(−0.04) 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.
Additional Information
© 2008. The American Astronomical Society. Received 2007 November 22; accepted 2008 January 30; published 2008 February 5. The WASP Consortium includes the Universities of Keele, Leicester, and St. Andrews, Queen's University Belfast, the Open University, and the Isaac Newton Group. WASP-S is hosted by the South African Astronomical Observatory (SAAO), and we are grateful for their support and assistance. Funding for WASP comes from Consortium Universities and the UK's Science and Technology Facilities Council.Attached Files
Published - WILapjl08.pdf
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Additional details
- Eprint ID
- 14678
- Resolver ID
- CaltechAUTHORS:20090727-142747868
- Consortium Universities
- Science and Technology Facilities Council (STFC)
- Created
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2009-08-12Created from EPrint's datestamp field
- Updated
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2021-11-08Created from EPrint's last_modified field
- Caltech groups
- Infrared Processing and Analysis Center (IPAC)