A nearly polar orbit for the extrasolar hot Jupiter WASP-79b

Addison, B. C. and Tinney, C. G. and Wright, D. J. and Bayliss, D. and Zhou, G. ORCID: https://orcid.org/0000-0002-4891-3517 and Hartman, J. D. and Bakos, G. A. and Schmidt, B. (2013) A nearly polar orbit for the extrasolar hot Jupiter WASP-79b. The Astrophysical Journal. Letters, 774 (1):L9. pp. 1-5. ISSN 2041-8205

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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 theUCLES spectrograph on theAnglo-Australian Telescope. We have used the Rossiter McLaughlin effect to determine the sky-projected spin-orbit angle to be λ = -106 +19-13 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 < 6250 Kand host hot Jupiters in spin-orbit misalignment.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Faculty/School / Institute/Centre: No Faculty
Faculty/School / Institute/Centre: No Faculty
Date Deposited: 25 Jan 2022 05:14
Last Modified: 25 Jan 2022 05:14
Uncontrolled Keywords: planets and satellites: dynamical evolution and stability; stars: individual (WASP-79); techniques: radial velocities; Astrophysics - Earth; and Planetary Astrophysics
Fields of Research (2008): 02 Physical Sciences > 0201 Astronomical and Space Sciences > 020110 Stellar Astronomy and Planetary Systems
Fields of Research (2020): 51 PHYSICAL SCIENCES > 5101 Astronomical sciences > 510109 Stellar astronomy and planetary systems
Socio-Economic Objectives (2008): E Expanding Knowledge > 97 Expanding Knowledge > 970102 Expanding Knowledge in the Physical Sciences
Socio-Economic Objectives (2020): 28 EXPANDING KNOWLEDGE > 2801 Expanding knowledge > 280120 Expanding knowledge in the physical sciences
Identification Number or DOI: https://doi.org/10.1088/2041-8205/774/1/l9
URI: http://eprints.usq.edu.au/id/eprint/44958

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