• DOI:10.1088/0004-637X/709/1/159
Corpus ID: 53628741

Wasp-17b: An Ultra-Low Density Planet in a Probable Retrograde Orbit

@article{Anderson2009Wasp17bAU,
  title={Wasp-17b: An Ultra-Low Density Planet in a Probable Retrograde Orbit},
  author={D. Anderson and C. Hellier and M. Gillon and A. Triaud and B. Smalley and L. Hebb and A. Cameron and P. Maxted and D. Queloz and R. West and S. Bentley and B. Enoch and K. Horne and T. Lister and M. Mayor and N. Parley and F. Pepe and D. Pollacco and D. S'egransan and S. Udry and D. Wilson},
  journal={The Astrophysical Journal},
  year={2009},
  volume={709},
  pages={159-167}
}

• D. Anderson, C. Hellier, +18 authors D. Wilson
• Published 2009
• Physics, Computer Science
• The Astrophysical Journal

We report the discovery of the transiting giant planet WASP-17b, the least-dense planet currently known. It is 1.6 Saturn masses, but 1.5-2 Jupiter radii, giving a density of 6%-14% that of Jupiter. WASP-17b is in a 3.7 day orbit around a sub-solar metallicity, V = 11.6, F6 star. Preliminary detection of the Rossiter-McLaughlin effect suggests that WASP-17b is in a retrograde orbit (λ –150°), indicative of a violent history involving planet-planet or star-planet scattering. WASP-17b's bloated… Expand

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