Published April 2007
| Published
Journal Article
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The Transit Light Curve Project. V. System Parameters and Stellar Rotation Period of HD 189733
Abstract
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).
Additional Information
© 2007 American Astronomical Society. Received 2006 December 6; accepted 2006 December 28. We thank F. Pont and M. Gillon for helpful discussions about correlated noise.We are grateful to G. Marcy, P. Butler, S. Vogt, and E. Turner for their help with the Doppler analysis and for encouragement. A. R. thanks the MIT Undergraduate Research Opportunities Program office for research funding.Attached Files
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Additional details
- Eprint ID
- 37324
- Resolver ID
- CaltechAUTHORS:20130305-151518559
- Massachusetts Institute of Technology (MIT)
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2013-03-06Created from EPrint's datestamp field
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2021-11-09Created from EPrint's last_modified field