Improved measurement of the Rossiter-McLaughlin effect in the exoplanetary system HD 17156

Norio Narita; Teruyuki Hirano; Bun'ei Sato; Joshua N. Winn; Yasushi Suto; Edwin L. Turner; Wako Aoki; Motohide Tamura; Toru Yamada

doi:10.1093/pasj/61.5.991

Improved measurement of the Rossiter-McLaughlin effect in the exoplanetary system HD 17156

Norio Narita, Teruyuki Hirano, Bun'ei Sato, Joshua N. Winn, Yasushi Suto, Edwin L. Turner, Wako Aoki, Motohide Tamura, Toru Yamada

Astrophysical Sciences

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36 Scopus citations

Abstract

We present an improved measurement of the Rossiter-McLaughlin effect for the exoplanetary system HD 17156, based on radial-velocity data gathered with the Subaru 8.2-m telescope throughout the planetary transit of UT 2008 November 7. The data allow for a precise and independent determination of the projected spin-orbit angle of this system: λ = 10.°0±5.°1. This result supersedes the previous claim of λ - 62° ±25° by Narita et al. (2008, PASJ, 60, L1), which was based on lower-precision data with poor statistics. Thus the stellar spin and planetary orbital axes of the HD 17156 system are likely to be well-aligned, despite the planet's large orbital eccentricity suggesting a history of strong dynamical interactions.

Original language	English (US)
Pages (from-to)	991-997
Number of pages	7
Journal	Publications of the Astronomical Society of Japan
Volume	61
Issue number	5
DOIs	https://doi.org/10.1093/pasj/61.5.991
State	Published - 2009

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

Keywords

Stars: planetary systems: individual (HD 17156)
Stars: rotation - techniques: radial velocities
Techniques: spectroscopic

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10.1093/pasj/61.5.991

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title = "Improved measurement of the Rossiter-McLaughlin effect in the exoplanetary system HD 17156",

abstract = "We present an improved measurement of the Rossiter-McLaughlin effect for the exoplanetary system HD 17156, based on radial-velocity data gathered with the Subaru 8.2-m telescope throughout the planetary transit of UT 2008 November 7. The data allow for a precise and independent determination of the projected spin-orbit angle of this system: λ = 10.°0±5.°1. This result supersedes the previous claim of λ - 62° ±25° by Narita et al. (2008, PASJ, 60, L1), which was based on lower-precision data with poor statistics. Thus the stellar spin and planetary orbital axes of the HD 17156 system are likely to be well-aligned, despite the planet's large orbital eccentricity suggesting a history of strong dynamical interactions.",

keywords = "Stars: planetary systems: individual (HD 17156), Stars: rotation - techniques: radial velocities, Techniques: spectroscopic",

author = "Norio Narita and Teruyuki Hirano and Bun'ei Sato and Winn, {Joshua N.} and Yasushi Suto and Turner, {Edwin L.} and Wako Aoki and Motohide Tamura and Toru Yamada",

year = "2009",

doi = "10.1093/pasj/61.5.991",

language = "English (US)",

volume = "61",

pages = "991--997",

journal = "Publications of the Astronomical Society of Japan",

issn = "0004-6264",

publisher = "Oxford University Press",

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TY - JOUR

T1 - Improved measurement of the Rossiter-McLaughlin effect in the exoplanetary system HD 17156

AU - Narita, Norio

AU - Hirano, Teruyuki

AU - Sato, Bun'ei

AU - Winn, Joshua N.

AU - Suto, Yasushi

AU - Turner, Edwin L.

AU - Aoki, Wako

AU - Tamura, Motohide

AU - Yamada, Toru

PY - 2009

Y1 - 2009

N2 - We present an improved measurement of the Rossiter-McLaughlin effect for the exoplanetary system HD 17156, based on radial-velocity data gathered with the Subaru 8.2-m telescope throughout the planetary transit of UT 2008 November 7. The data allow for a precise and independent determination of the projected spin-orbit angle of this system: λ = 10.°0±5.°1. This result supersedes the previous claim of λ - 62° ±25° by Narita et al. (2008, PASJ, 60, L1), which was based on lower-precision data with poor statistics. Thus the stellar spin and planetary orbital axes of the HD 17156 system are likely to be well-aligned, despite the planet's large orbital eccentricity suggesting a history of strong dynamical interactions.

AB - We present an improved measurement of the Rossiter-McLaughlin effect for the exoplanetary system HD 17156, based on radial-velocity data gathered with the Subaru 8.2-m telescope throughout the planetary transit of UT 2008 November 7. The data allow for a precise and independent determination of the projected spin-orbit angle of this system: λ = 10.°0±5.°1. This result supersedes the previous claim of λ - 62° ±25° by Narita et al. (2008, PASJ, 60, L1), which was based on lower-precision data with poor statistics. Thus the stellar spin and planetary orbital axes of the HD 17156 system are likely to be well-aligned, despite the planet's large orbital eccentricity suggesting a history of strong dynamical interactions.

KW - Stars: planetary systems: individual (HD 17156)

KW - Stars: rotation - techniques: radial velocities

KW - Techniques: spectroscopic

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U2 - 10.1093/pasj/61.5.991

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JO - Publications of the Astronomical Society of Japan

JF - Publications of the Astronomical Society of Japan

IS - 5

ER -

Improved measurement of the Rossiter-McLaughlin effect in the exoplanetary system HD 17156

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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