The Transit Light Curve Project. V. System Parameters and Stellar Rotation Period of HD 189733

By J. Winn, M. Holman, G. Henry, Anna Roussanova, K. Enya, Y. Yoshii, Avi Shporer, T. Mazeh, J. Johnson, N. Narita and 1 more. 2006

144 citations recorded by the source corpus.

We present photometry of HD 189733 during eight transits of its close-in giant planet, and out-of-transit photometry spanning 2 yr. Using the transit photometry, we determine the stellar and planetary radii and the photometric ephemeris. Outside of transits, there are quasi-periodic flux variations with a 13.4 day period that we attribute to stellar rotation. In combination with previous results, we derive upper limits on the orbital eccentricity and on the true angle between the stellar rotation axis and planetary orbit (as opposed to the angle between the projections of those axes on the sky).

Subfields: Astronomy and Astrophysics, Instrumentation

View Paper: https://www.semanticscholar.org/paper/b3835d5126aa6ecb33033b024f1c7255210fd72b

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In Astronomy and Astrophysics

1. N. Madhusudhan
2. Jon Fortney
3. D. Charbonneau
4. D. Sing
5. D. Deming
6. A. Showman
7. J. Southworth
8. Sara Seager

In Instrumentation

1. Jon Fortney
2. J. Southworth
3. N. Madhusudhan
4. D. Sing
5. J. Winn
6. D. Charbonneau
7. A. Showman
8. D. Deming

Citations in the corpus

• The Rossiter-McLaughlin effect of CoRoT-3b and HD 189733b (2009, unknown): “Also, HD 189733b has been extensively studied (Bouchy et al. (2005), Winn et al. (2006) (W06), Winn et al. (2007) (W07), Boisse et al. (2009) (B09)).”
• Stellar activity of planetary host star HD 189 733 (2008, methodology): “The result agrees with the value of Winn et al. (2007) and is still consistent with the Knutson et al. (2007) solutin introduced to explain the secondary transit delay.”
• Sodium Absorption from the Exoplanetary Atmosphere of HD 189733b Detected in the Optical Transmission Spectrum (2007, methodology): “…aligned with the planetary orbital axis using the Rossiter-McLaughlin effect (Winn et al. 2006), found evidence for photometric stellar variability and a stellar rotational period of ∼12 days (Henry & Winn 2007; Winn et al. 2007), and identified transit signatures of starspots (Pont et al. 2007).”
• SEARCH FOR CARBON MONOXIDE IN THE ATMOSPHERE OF THE TRANSITING EXOPLANET HD 189733b (2009, background): “Several observations of transits of HD 189733b have been published recently with improved 5 ephemeris (Bakos et al. 2006b; Winn et al. 2007a; Knutson et al. 2007; Pont et al. 2007; Knutson et al. 2009).”
• The prevalence of dust on the exoplanet HD 189733b from Hubble and Spitzer observations (2012, background): “Star spots modulate the total brightness of the star along the ∼12-days rotation cycle of the star (Winn et al. 2007).”
• Hubble Space Telescope time-series photometry of the planetary transit of HD 189733: no moon, no rings, starspots (2007, methodology): “…planet, HD 189733 has already been subjected to many follow-up observations, including extensive ground-based transit photometry (Bakos et al. 2006; Winn et al. 2007), measurement of the spin-orbit angle using the Rossiter-McLaughlin e ff ect (Winn et al. 2006), measurement and mapping of the…”
• Searching for star–planet interactions within the magnetosphere of HD 189733 (2010, background): “Hébrard & Lecavelier Des Etangs (2006) found it to be about 11.8 d, while Winn et al. (2007) found quasi-periodic flux variations of 13.4 d period, which they attributed to the stellar rotation.”
• Homogeneous studies of transiting extrasolar planets – I. Light-curve analyses (2008, methodology): “These have been compared to the properties of OGLE-TR-111 found by Pont et al. (2004), Winn et al. (2007b) (from the same data as analysed here) and Minniti et al. (2007).”
• Homogeneous studies of transiting extrasolar planets - III. Additional planets and stellar models (2010, methodology): “Excellent light curves from the FLWO 1.2 m (z band), Lick 1.0 m Nickel (Z band) and Wise 1.0 m telescopes were presented by Winn et al. (2007c) and the first two of these were included in Paper I.”
• ROTATION AND WINDS OF EXOPLANET HD 189733 b MEASURED WITH HIGH-DISPERSION TRANSMISSION SPECTROSCOPY (2015, background): “Winn et al. (2007) estimated a spot coverage of 1% at any moment for the star HD 189733, based on optical multiband photometric variability.”
• Evaporation of the planet HD 189733b observed in H I Lyman-α (2010, background): “The planet has a mass Mp=1.13 Jupiter masses (MJup) and a radius Rp=1.16 Jupiter radii (RJup) in the visible (Bakos et al. 2006; Winn et al. 2007).”
• EVIDENCE OF POSSIBLE SPIN–ORBIT MISALIGNMENT ALONG THE LINE OF SIGHT IN TRANSITING EXOPLANET SYSTEMS (2010, background): “If the rotation period of a star is known through photometric observations of starspots moving across its surface, and if the projected rotational velocity v sin i has been measured, then is is easy to compute (e.g. Winn et al. 2007).”
• High-precision photometry by telescope defocussing. I. The transiting planetary system WASP-5 (2009, background): “…studies of GJ 436 (Gillon et al. 2007; Demory et al. 2007; Alonso et al. 2008), HD17156 (Gillon et al. 2008a), HD189733 (Winn et al. 2007a), HATP-1 (Winn et al. 2007b), Hubble Space Telescope observations of HD189733 (Swain et al. 2008), and the NASA EPOXI mission (Christiansen et al. 2008).”
• Spitzer Transit and Secondary Eclipse Photometry of GJ 436b (2007, background): “Although ground-based observers are achieving impressive levels of precision (Winn et al. 2007), photometry from space-borne platforms remains the preferred observational technique for the highest precision transit measurements.”
• THE CLIMATE OF HD 189733b FROM FOURTEEN TRANSITS AND ECLIPSES MEASURED BY SPITZER (2010, methodology): “…et al. 2005; Holman and Murray 2005), improving the measurement of the atmospheric absorption (e.g. Tinetti et al. 2007), and improving the measured system parameters for better characterization of the planet, host-star, and orbit properties (Winn et al. 2007; Torres et al. 2008; Pont et al. 2007).”