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Confirmation of a Retrograde Orbit for Exoplanet WASP-17b

Bayliss, Daniel; Winn, Joshua; Mardling, Rosemary Anne; Sackett, Penny


We present high-precision radial velocity observations of WASP-17 throughout the transit of its close-in giant planet, using theMIKE spectrograph on the 6.5 mMagellan Telescope at Las Campanas Observatory. By modeling the Rossiter-McLaughlin effect, we find the sky-projected spin-orbit angle to be λ = 167.4±11.2 deg. This independently confirms the previous finding thatWASP-17b is on a retrograde orbit, suggesting it underwent migration via amechanism other than just the gravitational...[Show more]

CollectionsANU Research Publications
Date published: 2010
Type: Journal article
Source: Astrophysical Journal, The
DOI: 10.1088/2041-8205/722/2/L224


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