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

研究成果: Article査読

31 被引用数 (Scopus)

抄録

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.

本文言語English
ページ(範囲)991-997
ページ数7
ジャーナルPublications of the Astronomical Society of Japan
61
5
DOI
出版ステータスPublished - 2009
外部発表はい

ASJC Scopus subject areas

  • 天文学と天体物理学
  • 宇宙惑星科学

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