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René Timcenko Tronsgaard Rasmussen

Physical properties and transmission spectrum of theWASP-74 planetary system from multiband photometry

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DOI

  • L. Mancini, Universita degli Studi di Roma Tor Vergata, Max-Planck-Institut für Astronomie, Königstuhl 17, 69117, Heidelberg, Germany, Napoli Capodimonte, Instituto Internazionale per Gli Alti Studi Scientifici (IIASS)
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  • J. Southworth, Keele University
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  • P. Mollière, Leiden Observatory Research Institute
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  • J. Tregloan-Reed, Universidad de Antofagasta
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  • I. G. Juvan, Austrian Academy of Sciences, Karl-Franzens- Universitt, Innsbruck University
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  • G. Chen, Key Laboratory of Planetary Sciences, Purple Mountain Observatory Chinese Academy of Sciences, Instituto de Astrofísica de Canarias
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  • P. Sarkis, Max-Planck-Institut für Astronomie, Königstuhl 17, 69117, Heidelberg, Germany
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  • I. Bruni, I.N.A.F. - Osservatorio Astronomico di Bologna
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  • S. Ciceri, Stockholms Universitet
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  • M. I. Andersen, Niels Bohr Institute
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  • V. Bozza, University of Salerno, Istituto Nazionale di Fisica Nucleare, Sezione di Napoli
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  • D. M. Bramich, New York University Abu Dhabi
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  • M. Burgdorf, Universitat Hamburg
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  • G. D'Ago, Pontificia Universidad Catolica de Chile
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  • M. Dominik, University of St. Andrews
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  • D. F. Evans, Astrophysics Group, Keele University, Staffordshire, ST5 5BG, Keele University
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  • R. Figuera Jaimes, University of St. Andrews, European Southern Observatory, Tsinghua University
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  • L. Fossati, Austrian Academy of Sciences
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  • T. Henning, Max-Planck-Institut für Astronomie, Königstuhl 17, 69117, Heidelberg, Germany
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  • T. C. Hinse, Chungnam National University, Korea Astronomy and Space Science Institute
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  • M. Hundertmark, Astronomisches Rechen-Institut Heidelberg
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  • U. G. Jørgensen, Niels Bohr Institute
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  • E. Kerins, Manchester University
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  • H. Korhonen, Niels Bohr Institute
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  • M. Küffmeier, Universität Heidelberg
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  • P. Longa, Universidad de Antofagasta
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  • N. Peixinho, University of Coimbra
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  • A. Popovas, Niels Bohr Institute
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  • M. Rabus, Max-Planck-Institut für Astronomie, Königstuhl 17, 69117, Heidelberg, Germany, Pontificia Universidad Catolica de Chile, Las Cumbres Observatory Global Telescope Network, Inc, University of California, Santa Barbara
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  • S. Rahvar, Sharif University of Technology
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  • J. Skottfelt, Niels Bohr Institute, Open University
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  • C. Snodgrass, University of Edinburgh, Institute for Astronomy
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  • R. Tronsgaard
  • Y. Wang, Key Laboratory of Planetary Sciences, Purple Mountain Observatory Chinese Academy of Sciences, Yunnan Observatories, National Astronomical Observatories Chinese Academy of Sciences
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  • O. Wertz, Université de Liège

We present broad-band photometry of 11 planetary transits of the hot Jupiter WASP-74 b, using three medium-class telescopes and employing the telescope-defocusing technique. Most of the transits were monitored through I filters and one was simultaneously observed in five optical (U, g', r', i', z') and three near-infrared (J, H, K) passbands, for a total of 18 light curves. We also obtained new high-resolution spectra of the host star. We used these new data to review the orbital and physical properties of the WASP-74 planetary system. We were able to better constrain the main system characteristics, measuring smaller radius and mass for both the hot Jupiter and its host star than previously reported in the literature. Joining our optical data with those taken with the HST in the near infrared, we built up an observational transmission spectrum of the planet, which suggests the presence of strong optical absorbers, as TiO and VO gases, in its atmosphere.

Original languageEnglish
JournalMonthly Notices of the Royal Astronomical Society
Volume485
Issue4
Pages (from-to)5168-5179
Number of pages12
ISSN0035-8711
DOIs
Publication statusPublished - Mar 2019

    Research areas

  • Planetary systems, Stars: Fundamental parameters, Stars: Individual: WASP-74, Techniques: Photometric

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