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

B. C. Addison; C. G. Tinney; D. J. Wright; D. Bayliss; G. Zhou; J. D. Hartman; G. A. Bakos; B. Schmidt

doi:10.1088/2041-8205/774/1/L9

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

B. C. Addison, C. G. Tinney, D. J. Wright, D. Bayliss, G. Zhou, J. D. Hartman, G. A. Bakos, B. Schmidt

Astrophysical Sciences

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41 Scopus citations

Abstract

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 T_eff < 6250 Kand host hot Jupiters in spin-orbit misalignment.

Original language	English (US)
Article number	L9
Journal	Astrophysical Journal Letters
Volume	774
Issue number	1
DOIs	https://doi.org/10.1088/2041-8205/774/1/L9
State	Published - Sep 1 2013

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

Keywords

planets and satellites: dynamical evolution and stability
stars: individual (WASP-79)
techniques: radial velocities

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10.1088/2041-8205/774/1/L9

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title = "A nearly polar orbit for the extrasolar hot jupiter WASP-79b",

abstract = "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.",

keywords = "planets and satellites: dynamical evolution and stability, stars: individual (WASP-79), techniques: radial velocities",

author = "Addison, {B. C.} and Tinney, {C. G.} and Wright, {D. J.} and D. Bayliss and G. Zhou and Hartman, {J. D.} and Bakos, {G. A.} and B. Schmidt",

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T1 - A nearly polar orbit for the extrasolar hot jupiter WASP-79b

AU - Addison, B. C.

AU - Tinney, C. G.

AU - Wright, D. J.

AU - Bayliss, D.

AU - Zhou, G.

AU - Hartman, J. D.

AU - Bakos, G. A.

AU - Schmidt, B.

PY - 2013/9/1

Y1 - 2013/9/1

N2 - 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.

AB - 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.

KW - planets and satellites: dynamical evolution and stability

KW - stars: individual (WASP-79)

KW - techniques: radial velocities

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JO - Astrophysical Journal Letters

JF - Astrophysical Journal Letters

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M1 - L9

ER -

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

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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