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

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

Research output: Contribution to journal › Article › peer-review

75 Scopus citations

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 ± 0.056R _Jup and 1.736 ± 0.092R _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 ± 0.055R _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.

Original language	English (US)
Article number	179
Journal	Astronomical Journal
Volume	141
Issue number	6
DOIs	https://doi.org/10.1088/0004-6256/141/6/179
State	Published - Jun 2011
Externally published	Yes

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

Keywords

planetary systems
stars: individual (TrES-4, HAT-P-3, WASP-12)

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10.1088/0004-6256/141/6/179

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title = "The transit light-curve project. XIV. Confirmation of anomalous radii for the exoplanets TrES-4b, HAT-P-3b, and WASP-12b",

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 ± 0.056R Jup and 1.736 ± 0.092R 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 ± 0.055R 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.",

keywords = "planetary systems, stars: individual (TrES-4, HAT-P-3, WASP-12)",

author = "Tucker Chan and Mikael Ingemyr and Winn, {Joshua N.} and Holman, {Matthew J.} and Roberto Sanchis-Ojeda and Gil Esquerdo and Mark Everett",

year = "2011",

month = jun,

doi = "10.1088/0004-6256/141/6/179",

language = "English (US)",

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journal = "Astronomical Journal",

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T1 - The transit light-curve project. XIV. Confirmation of anomalous radii for the exoplanets TrES-4b, HAT-P-3b, and WASP-12b

AU - Chan, Tucker

AU - Ingemyr, Mikael

AU - Winn, Joshua N.

AU - Holman, Matthew J.

AU - Sanchis-Ojeda, Roberto

AU - Esquerdo, Gil

AU - Everett, Mark

PY - 2011/6

Y1 - 2011/6

N2 - 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 ± 0.056R Jup and 1.736 ± 0.092R 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 ± 0.055R 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.

AB - 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 ± 0.056R Jup and 1.736 ± 0.092R 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 ± 0.055R 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.

KW - planetary systems

KW - stars: individual (TrES-4, HAT-P-3, WASP-12)

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ER -

The transit light-curve project. XIV. Confirmation of anomalous radii for the exoplanets TrES-4b, HAT-P-3b, and WASP-12b

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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