THE ROTATION PERIOD OF THE PLANET-HOSTING STAR HD 189733

2007/09/13 by Gregory W. Henry, Joshua N. Winn · 4 citations
Physics and Astronomy · #Astronomy #Astronomy and Astrophysical Research #Astrophysics #Astrophysics and Star Formation Studies #Exoplanet #Geometry #Orbital period #Photometry (optics) #Physics #Planet #Rotation (mathematics) #Rotation period #Star (game theory) #Stars #Stellar rotation #Stellar, planetary, and galactic studies #astro-ph

paper · pdf · doi:10.1088/0004-6256/135/1/68

published as Astron.J.135:68-71,2008 · To appear in AJ

arxiv created 2007/09/13 · openalex publication_date 2007/11/29 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We present synoptic optical photometry of HD 189733, the chromospherically active parent star of one of the most intensively studied exoplanets. We have significantly extended the timespan of our previously reported observations and refined the estimate of the stellar rotation period by more than an order of magnitude: P = 11.953 ± 0.009 days. We derive a lower limit on the inclination of the stellar rotation axis of 56 ◦ (with 95 % confidence), corroborating earlier evidence that the stellar spin axis and planetary orbital axis are well aligned. Subject headings: planetary systems — planetary systems: formation — stars: individual (HD 189733) — stars: rotation 1.

Citations

• Further development and properties of the spectral analysis by least-squares
• The Rossiter‐McLaughlin Effect and Analytic Radial Velocity Curves for Transiting Extrasolar Planetary Systems
• Prospects for the Characterization and Confirmation of Transiting Exoplanets via the Rossiter‐McLaughlin Effect
• Measurement of the Spin-Orbit Alignment in the Exoplanetary System HD 189733
• Refined Parameters of the Planet Orbiting HD 189733
• A map of the day–night contrast of the extrasolar planet HD 189733b

Cited by

• A rocky composition for an Earth-sized exoplanet
• A search for p-modes and other variability in the binary system 85 Pegasi using MOST photometry
• Homogeneous studies of transiting extrasolar planets – I. Light-curve analyses
• Transiting exoplanets from the CoRoT space mission

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