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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Published inAstrophysical journal. Letters Vol. 774; no. 1; pp. 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 Journal Article
LanguageEnglish
Published United States 01.09.2013
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.
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ISSN:2041-8205
2041-8213
DOI:10.1088/2041-8205/774/1/L9