The Transit Light Curve project. XIV. Confirmation of Anomalous Radii for the Exoplanets TrES-4b, HAT-P-3b, and WASP-12b

Tucker Chan; Mikael Ingemyr; Joshua N. Winn; Matthew J. Holman; Roberto Sanchis-Ojeda; Gil Esquerdo; Mark Everett

doi:10.1088/0004-6256/141/6/179

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arXiv · 1103.3078

The Transit Light Curve project. XIV. Confirmation of Anomalous Radii for the Exoplanets TrES-4b, HAT-P-3b, and WASP-12b

Tucker Chan·Mikael Ingemyr·Joshua N. Winn·Matthew J. Holman·Roberto Sanchis-Ojeda·Gil Esquerdo·Mark Everett

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Abstract

We present transit photometry of three exoplanets, TrES-4b, HAT-P-3b, and WASP-12b, allowing for refined estimates of the systems' parameters. TrES-4b and WASP-12b were confirmed to be "bloated" planets, with radii of 1.706 +/- 0.056 R_Jup and 1.736 +/- 0.092 R_Jup, respectively. These planets are too large to be explained with standard models of gas giant planets. In contrast, HAT-P-3b has a radius of 0.827 +/- 0.055 R_Jup, smaller than a pure hydrogen-helium planet and indicative of a highly metal-enriched composition. Analyses of the transit timings revealed no significant departures from strict periodicity. For TrES-4, our relatively recent observations allow for improvement in the orbital ephemerides, which is useful for planning future observations.

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Tucker Chan, Mikael Ingemyr, Joshua N. Winn, Matthew J. Holman, Roberto Sanchis-Ojeda, Gil Esquerdo, Mark Everett. 2011-03-16. The Transit Light Curve project. XIV. Confirmation of Anomalous Radii for the Exoplanets TrES-4b, HAT-P-3b, and WASP-12b. https://doi.org/10.1088/0004-6256%2F141%2F6%2F179

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