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 hot Jupiter from the Wide Angle Search for Planets (WASP) survey. Data were obtained using the CYCLOPS2 optical-fiber bundle and its simultaneous calibration system feeding the UCLES spectrograph on t...

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Bibliographic Details
Published in:Astrophysical journal. Letters 2013-09, Vol.774 (1), p.1-5
Main Authors: Addison, B C, Tinney, C G, Wright, D J, Bayliss, D, Zhou, G, Hartman, J D, Bakos, G A, Schmidt, B
Format: Article
Language:English
Subjects:
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
CALIBRATION
Extrasolar planets
Feeding
Gas giant planets
Misalignment
OPTICAL FIBERS
ORBITS
PLANETS
Polar orbits
SKY
SPIN
STAR EVOLUTION
STARS
TELESCOPES
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Summary:We report the measurement of a spin-orbit misalignment for WASP-79b, a recently discovered, bloated hot Jupiter from the Wide Angle Search for Planets (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] = (ProQuest: Formulae and/or non-USASCII text omitted). 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 T sub(eff) > 6250 K and host hot Jupiters in spin-orbit misalignment.
ISSN:2041-8205
2041-8213
DOI:10.1088/2041-8205/774/1/L9