A spin-orbit alignment for the hot Jupiter HATS-3b

Addison, B. C. and Tinney, C. G. and Wright, D. J. and Bayliss, D. (2014) A spin-orbit alignment for the hot Jupiter HATS-3b. The Astrophysical Journal, 792 (2). pp. 1-10. ISSN 1538-3881

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Abstract

We have measured the alignment between the orbit of HATS-3b (a recently discovered, slightly inflated Hot Jupiter) and the spin axis of its host star. Data were obtained using the CYCLOPS2 optical-fiber bundle and its simultaneous calibration system feeding the UCLES spectrograph on the Anglo-Australian Telescope. The sky-projected spin-orbit angle of λ = 3° ± 25° was determined from spectroscopic measurements of the Rossiter-McLaughlin effect. This is the first exoplanet discovered through the HATSouth transit survey to have its spin-orbit angle measured. Our results indicate that the orbital plane of HATS-3b is consistent with being aligned to the spin axis of its host star. The low obliquity of the HATS-3 system, which has a relatively hot mid F-type host star, agrees with the general trend observed for Hot Jupiter host stars with effective temperatures >6250 K to have randomly distributed spin-orbit angles. Based on observations obtained at the Anglo-Australian Telescope, Siding Spring, Australia.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Published version deposited in accordance with the copyright policy of the publisher.
Faculty/School / Institute/Centre: Historic - Faculty of Health, Engineering and Sciences - School of Agricultural, Computational and Environmental Sciences (1 July 2013 - 5 Sept 2019)
Faculty/School / Institute/Centre: Historic - Faculty of Health, Engineering and Sciences - School of Agricultural, Computational and Environmental Sciences (1 July 2013 - 5 Sept 2019)
Date Deposited: 13 Aug 2019 22:41
Last Modified: 13 Aug 2019 23:43
Uncontrolled Keywords: planets and satellites, dynamical evolution and stability, stars, individual, HATS-3, techniques radial velocities
Fields of Research : 02 Physical Sciences > 0201 Astronomical and Space Sciences > 020110 Stellar Astronomy and Planetary Systems
Identification Number or DOI: 10.1088/0004-637X/792/2/112
URI: http://eprints.usq.edu.au/id/eprint/36366

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