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

B. C. Addison; C. G. Tinney; D. J. Wright; D. Bayliss

doi:10.1088/0004-637X/792/2/112

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

B. C. Addison, C. G. Tinney, D. J. Wright, D. Bayliss

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8 Citations (Scopus)

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.

Original language	English
Article number	112
Journal	Astrophysical Journal
Volume	792
Issue number	2
DOIs	https://doi.org/10.1088/0004-637X/792/2/112
Publication status	Published - 10 Sept 2014

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title = "A spin-orbit alignment for the hot Jupiter HATS-3b",

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.",

keywords = "planets and satellites: dynamical evolution and stability, stars: individual (HATS-3), techniques: radial velocities",

author = "Addison, \{B. C.\} and Tinney, \{C. G.\} and Wright, \{D. J.\} and D. Bayliss",

year = "2014",

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doi = "10.1088/0004-637X/792/2/112",

language = "English",

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journal = "Astrophysical Journal",

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publisher = "American Astronomical Society",

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TY - JOUR

T1 - A spin-orbit alignment for the hot Jupiter HATS-3b

AU - Addison, B. C.

AU - Tinney, C. G.

AU - Wright, D. J.

AU - Bayliss, D.

PY - 2014/9/10

Y1 - 2014/9/10

N2 - 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.

AB - 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.

KW - planets and satellites: dynamical evolution and stability

KW - stars: individual (HATS-3)

KW - techniques: radial velocities

UR - https://www.scopus.com/pages/publications/84906751856

U2 - 10.1088/0004-637X/792/2/112

DO - 10.1088/0004-637X/792/2/112

M3 - Article

SN - 0004-637X

VL - 792

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2

M1 - 112

ER -

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

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