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René Timcenko Tronsgaard Rasmussen

High-precision photometry by telescope defocussing - VIII. WASP-22, WASP-41, WASP-42 and WASP-55

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  • John Southworth, Astrophysics Group, Keele University, Staffordshire ST5 5BG
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  • J. Tregloan-Reed, NASA Ames Research Center Institute, Moffett Field, CA 94035, USA
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  • M. I. Andersen, Dark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, 2100, Copenhagen, Denmark
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  • S. Calchi Novati, Istituto Internazionale per gli Alti Studi Scientifici (IIASS), 84019 Vietri Sul Mare (SA), Italy
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  • S. Ciceri, Max Planck Institute for Astronomy, Königstuhl 17 69117 Heidelberg, Germany
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  • J. P. Colque, Unidad de Astronomía, Facultad de Ciencias Básicas, Universidad de Antofagasta, Avenida U. de Antofagasta 02800, Antofagasta, Chile
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  • G. D'Ago, Istituto Internazionale per gli Alti Studi Scientifici (IIASS), 84019 Vietri Sul Mare (SA), Italy
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  • M. Dominik, SUPA, University of St Andrews, School of Physics and Astronomy, North Haugh, St Andrews KY16 9SS, UK
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  • D. F. Evans, Astrophysics Group, Keele University, Staffordshire ST5 5BG
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  • S.-H. Gu, National Astronomical Observatories/Yunnan Observatory, Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, China
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  • A. Herrera-Cordova, Unidad de Astronomía, Facultad de Ciencias Básicas, Universidad de Antofagasta, Avenida U. de Antofagasta 02800, Antofagasta, Chile
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  • T. C. Hinse, Korea Astronomy and Space Science Institute, Daejeon, 305-348 Republic of Korea
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  • Uffe Gråe Jørgensen, Niels Bohr Institute and Centre for Star and Planet Formation, University of Copenhagen, Øster Voldgade 5, DK-1350 Copenhagen K, Denmark, Københavns Universitet, Denmark
  • D. Juncher, Niels Bohr Institute and Centre for Star and Planet Formation, University of Copenhagen, Øster Voldgade 5, DK-1350 Copenhagen K, Denmark
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  • M. Kuffmeier, Niels Bohr Institute and Centre for Star and Planet Formation, University of Copenhagen, Øster Voldgade 5, DK-1350 Copenhagen K, Denmark
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  • L. Mancini, INAF—Osservatorio Astrofisico di Torino, Via Osservatorio 20, I-10025 Pino Torinese, Italy
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  • N. Peixinho, Unidad de Astronomía, Facultad de Ciencias Básicas, Universidad de Antofagasta, Avenida U. de Antofagasta 02800, Antofagasta, Chile
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  • A. Popovas, Niels Bohr Institute and Centre for Star and Planet Formation, University of Copenhagen, Øster Voldgade 5, DK-1350 Copenhagen K, Denmark
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  • M. Rabus, Instituto de Astrofísica, Facultad de Física, Pontificia Universidad Católica de Chile, Av. Vicuña Mackenna 4860, 7820436 Macul, Santiago, Chile
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  • J. Skottfelt, Centre of Electronic Imaging, Department of Physical Sciences, The Open University, Milton Keynes MK7 6AA, UK
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  • René Tronsgaard Rasmussen
  • E. Unda-Sanzana, Unidad de Astronomía, Facultad de Ciencias Básicas, Universidad de Antofagasta, Avenida U. de Antofagasta 02800, Antofagasta, Chile
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  • X.-B. Wang, National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, Kunming, 650011 China, National Astronomical Observatories/Yunnan Observatory, Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, China
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  • O. Wertz, Institut d'Astrophysique et de Géophysique, Université de Liège, 4000 Liège, Belgium
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  • K. A. Alsubai, Qatar Environment and Energy Research Institute (QEERI
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  • J. M. Andersen, Niels Bohr Institute and Centre for Star and Planet Formation, University of Copenhagen, Øster Voldgade 5, DK-1350 Copenhagen K, Denmark, Department of Astronomy, Boston University, 725 Commonwealth Avenue, Boston, MA 02215, USA
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  • V. Bozza, Istituto Nazionale di Fisica Nucleare, Sezione di Napoli, I-80126 Napoli, Italy
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  • D. M. Bramich, Qatar Environment and Energy Research Institute (QEERI
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  • M. Burgdorf, Universität Hamburg, Meteorologisches Institut, Bundesstraße 55, D-20146 Hamburg, Germany
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  • Y. Damerdji, Institut d'Astrophysique et de Géophysique, Université de Liège, 4000 Liège, Belgium
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  • C. Diehl, Hamburger Sternwarte, Universität Hamburg, Gojenbergsweg 112, D-21029 Hamburg, Germany
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  • A. Elyiv, Main Astronomical Observatory, Academy of Sciences of Ukraine, vul. Akademika Zabolotnoho 27, UA-03680 Kyiv, Ukraine
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  • R. Figuera Jaimes, European Southern Observatory, Karl-Schwarzschild-Strasse 2, D-85748 Garching bei München, Germany
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  • T. Haugbølle, Niels Bohr Institute and Centre for Star and Planet Formation, University of Copenhagen, Øster Voldgade 5, DK-1350 Copenhagen K, Denmark
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  • M. Hundertmark, Niels Bohr Institute and Centre for Star and Planet Formation, University of Copenhagen, Øster Voldgade 5, DK-1350 Copenhagen K, Denmark
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  • N. Kains, Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA nelan@stsci.edu
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  • E. Kerins, Jodrell Bank Centre for Astrophysics, University of Manchester, Oxford Road Manchester, M13 9PL
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  • H. Korhonen, Finnish Centre for Astronomy with ESO (FINCA), University of Turku, Väisäläntie 20, FI-21500 Piikkiö, Finland
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  • C. Liebig, SUPA, University of St Andrews, School of Physics and Astronomy, North Haugh, St Andrews KY16 9SS, UK
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  • M. Mathiasen, Niels Bohr Institute and Centre for Star and Planet Formation, University of Copenhagen, Øster Voldgade 5, DK-1350 Copenhagen K, Denmark, Denmark
  • M. T. Penny, Department of Astronomy, Ohio State University, 140 W. 18th Ave., Columbus, OH 43210, USA
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  • S. Rahvar, Department of Physics, Sharif University of Technology, P. O. Box 11155-9161 Tehran, Iran
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  • G. Scarpetta, Istituto Nazionale di Fisica Nucleare, Sezione di Napoli, I-80126 Napoli, Italy
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  • R. W. Schmidt, Astronomisches Rechen-Institut, Zentrum für Astronomie, Universität Heidelberg, Mönchhofstraße 12-14, 69120, Heidelberg, Germany
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  • C. Snodgrass, Planetary and Space Sciences, Department of Physical Sciences, The Open University, Milton Keynes MK7 6AA, UK
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  • D. Starkey, SUPA, University of St Andrews, School of Physics and Astronomy, North Haugh, St Andrews KY16 9SS, UK
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  • J. Surdej, Institut d'Astrophysique et de Géophysique, Université de Liège, 4000 Liège, Belgium
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  • C. Vilela, Astrophysics Group, Keele University, Staffordshire ST5 5BG
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  • Carolina von Essen
  • Y. Wang, National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, Kunming, 650011 China
We present 13 high-precision and four additional light curves of four bright southern-hemisphere transiting planetary systems: WASP-22, WASP-41, WASP-42 and WASP-55. In the cases of WASP-42 and WASP-55, these are the first follow-up observations since their discovery papers. We present refined measurements of the physical properties and orbital ephemerides of all four systems. No indications of transit timing variations were seen. All four planets have radii inflated above those expected from theoretical models of gas-giant planets; WASP-55 b is the most discrepant with a mass of 0.63 MJup and a radius of 1.34 RJup. WASP-41 shows brightness anomalies during transit due to the planet occulting spots on the stellar surface. Two anomalies observed 3.1 d apart are very likely due to the same spot. We measure its change in position and determine a rotation period for the host star of 18.6 ± 1.5 d, in good agreement with a published measurement from spot-induced brightness modulation, and a sky-projected orbital obliquity of λ = 6 ± 11°. We conclude with a compilation of obliquity measurements from spot-tracking analyses and a discussion of this technique in the study of the orbital configurations of hot Jupiters.
Original languageEnglish
JournalRoyal Astronomical Society. Monthly Notices
Volume457
Issue4
Pages (from-to)4205-4217
ISSN0035-8711
DOIs
Publication statusPublished - 1 Apr 2016

    Research areas

  • stars: fundamental parameters, stars: individual: WASP-22, WASP-41, WASP-42, WASP-55, planetary systems

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