A NEARLY POLAR ORBIT FOR THE EXTRASOLAR HOT JUPITER WASP-79b

Journal Article · Sun Sep 01 00:00:00 EDT 2013 · Astrophysical Journal Letters

DOI:https://doi.org/10.1088/2041-8205/774/1/L9· OSTI ID:22136547

Addison, B. C.; Tinney, C. G.; Wright, D. J. ^[1]; Bayliss, D.; Zhou, G.; Schmidt, B. ^[2]; Hartman, J. D.

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1. Exoplanetary Science Group, School of Physics, University of New South Wales, NSW 2052 (Australia)
2. Research School of Astronomy and Astrophysics, Australian National University, Canberra, ACT 2611 (Australia)

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}= -106{sup +19}{sub -13} {sup o}. 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.

• OSTI ID: 22136547
• Journal Information: Astrophysical Journal Letters, Vol. 774, Issue 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 2041-8205
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
CALIBRATION
OPTICAL FIBERS
ORBITS
PLANETS
SKY
SPIN
STAR EVOLUTION
STARS
TELESCOPES