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

Journal Article · Wed Sep 10 00:00:00 EDT 2014 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/792/2/112· OSTI ID:22365128

Addison, B. C.; Tinney, C. G.; Wright, D. J. ^[1]

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1. Exoplanetary Science Group, School of Physics, University of New South Wales, Sydney, NSW 2052 (Australia)

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.

• OSTI ID: 22365128
• Journal Information: Astrophysical Journal, Vol. 792, Issue 2; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
ALIGNMENT
CALIBRATION
HOST
OPTICAL FIBERS
ORBITS
RADIAL VELOCITY
RANDOMNESS
SATELLITES
SPIN
STABILITY
STAR EVOLUTION
TELESCOPES