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

Research output: Contribution to journalJournal article – Annual report year: 2019Researchpeer-review

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  • Author: Mancini, L.

    Max Planck Institute for Astronomy, Germany

  • Author: Southworth, J.

    Keele University, United Kingdom

  • Author: Mollière, P.

    Leiden University, Netherlands

  • Author: Tregloan-Reed, J.

    Universidad de Antofagasta, Chile

  • Author: Juvan, I. G.

    University of Graz, Austria

  • Author: Chen, G.

    Chinese Academy of Sciences, China

  • Author: Sarkis, P.

    Max Planck Institute for Astronomy, Germany

  • Author: Bruni, I.

    Osservatorio Astronomico di Bologna, Italy

  • Author: Ciceri, S.

    Stockholm University, Sweden

  • Author: Andersen, M. I.

    University of Copenhagen, Denmark

  • Author: Bozza, V.

    University of Salerno, Italy

  • Author: Bramich, D. M.

    NYU Abu Dhabi, United Arab Emirates

  • Author: Burgdorf, M.

    University of Hamburg, Germany

  • Author: D'Ago, G.

    Pontificia Universidad Catolica de Chile, Chile

  • Author: Dominik, M.

    University of St Andrews, United Kingdom

  • Author: Evans, D. F.

    Keele University, United Kingdom

  • Author: Figuera Jaimes, R.

    University of St Andrews, United Kingdom

  • Author: Fossati, L.

    Austrian Academy of Sciences, Austria

  • Author: Henning, Th

    Max Planck Institute for Astronomy, Germany

  • Author: Hinse, T. C.

    Chungnam National University, Korea, Republic of

  • Author: Hundertmark, M.

    Heidelberg University , Germany

  • Author: Jørgensen, U. G.

    University of Copenhagen, Denmark

  • Author: Kerins, E.

    University of Manchester, United Kingdom

  • Author: Korhonen, H.

    University of Copenhagen

  • Author: Küffmeier, M.

    Heidelberg University , Germany

  • Author: Longa, P.

    Universidad de Antofagasta, Chile

  • Author: Peixinho, N.

    University of Coimbra

  • Author: Popovas, A.

    University of Copenhagen

  • Author: Rabus, M.

    Max Planck Institute for Astronomy, Germany

  • Author: Rahvar, S.

    Sharif University of Technology, Iran, Islamic Republic of

  • Author: Skottfelt, J.

    University of Copenhagen, Denmark

  • Author: Snodgrass, C.

    University of Edinburgh, United Kingdom

  • Author: Tronsgaard, R.

    Astrophysics and Atmospheric Physics, National Space Institute, Technical University of Denmark, Elektrovej, 2800, Kgs. Lyngby, Denmark

  • Author: Wang, Y.

    Chinese Academy of Sciences, China

  • Author: Wertz, O.

    University of Liege, Belgium

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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
Issue number4
Pages (from-to)5168-5179
ISSN0035-8711
DOIs
Publication statusPublished - 2019
CitationsWeb of Science® Times Cited: No match on DOI

    Research areas

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

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