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

B. C. Addison; C. G. Tinney; D. J. Wright; D. Bayliss; G. Zhou; J. D. Hartman; G. Á. Bakos; B. Schmidt

doi:10.1088/2041-8205/774/1/L9

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

Earth and Planetary Astrophysics 2013-08-16 v2

Authors: B. C. Addison , C. G. Tinney , D. J. Wright , D. Bayliss , G. Zhou , J. D. Hartman , G. Á. Bakos , B. Schmidt

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Abstract

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.

Keywords

exoplanet hot Jupiter spin-orbit misalignment Rossiter-McLaughlin effect polar orbit transiting planet

Cite

@article{arxiv.1306.0878,
  title  = {A Nearly Polar Orbit for the Extrasolar Hot Jupiter WASP-79b},
  author = {B. C. Addison and C. G. Tinney and D. J. Wright and D. Bayliss and G. Zhou and J. D. Hartman and G. Á. Bakos and B. Schmidt},
  journal= {arXiv preprint arXiv:1306.0878},
  year   = {2013}
}

Comments

8 pages, 2 figures, in press ApJL (accepted 2 August 2013)

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

Abstract

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