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 journalArticle

58 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 languageEnglish (US)
Article number179
JournalAstronomical Journal
Volume141
Issue number6
DOIs
StatePublished - Jun 1 2011
Externally publishedYes

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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