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A Nearly Polar Orbit for the Extrasolar Hot Jupiter WASP-79b

We report the measurement of a spin-orbit misalignment for WASP-79b, a recently discovered, bloated transiting hot Jupiter from the WASP survey. Data were obtained using the CYCLOPS2 optical-fiber bundle and its simultaneous calibration system feeding the UCLES spectrograph on the Anglo-Australian Telescope. We have used the Rossiter-McLaughlin effect to determine the sky-projected spin-orbit angle to be lambda = -106+19-13 degrees. This result indicates a significant misalignment between the spin axis of the host star and the orbital plane of the planet -- the planet being in a nearly polar orbit. WASP-79 is consistent with other stars that have Teff > 6250K and host hot Jupiters in spin-orbit misalignment.

preprint2013arXivOpen access
B. C. AddisonC. G. TinneyD. J. WrightD. BaylissG. ZhouJ. D. HartmanG. Á. BakosB. Schmidt
astro-ph.EP
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B. C. AddisonC. G. TinneyD. J. WrightD. BaylissG. ZhouJ. D. HartmanG. Á. BakosB. Schmidt

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