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

Mancini, L.; Southworth, J.; Mollière, P.; Tregloan-Reed, J.; Juvan, I. G.; Chen, G.; Sarkis, P.; Bruni, I.; Ciceri, S.; Andersen, M. I.; Bozza, V.; Bramich, D. M.; Burgdorf, M.; D'Ago, G.; Dominik, M.; Evans, D. F.; Figuera Jaimes, R.; Fossati, L.; Henning, T.; Hinse, T. C.; Hundertmark, M.; Jørgensen, U. G.; Kerins, E.; Korhonen, H.; Küffmeier, M.; Longa, P.; Peixinho, N.; Popovas, A.; Rabus, M.; Rahvar, S.; Skottfelt, J.; Snodgrass, C.; Tronsgaard, R.; Wang, Y.; Wertz, Olivier

doi:10.1093/mnras/stz661

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

Mancini, L.; Southworth, J.; Mollière, P. et al.

2019 • In Monthly Notices of the Royal Astronomical Society, 485 (4), p. 5168-5179

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https://hdl.handle.net/2268/266370

DOI
10.1093/mnras/stz661

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Keywords :

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

Abstract :

[en] 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. © 2019 The Author(s).

Disciplines :

Space science, astronomy & astrophysics

Author, co-author :

Mancini, L.; Department of Physics, University of Rome Tor Vergata, Via della Ricerca Scientifica 1, Rome, I-00133, Italy, Max Planck Institute for Astronomy, Königstuhl 17, Heidelberg, D-69117, Germany, INAF - Osservatorio Astrofisico di Torino, via Osservatorio 20, Pino Torinese, I-10025, Italy, International Institute for Advanced Scientific Studies (IIASS), Via G. Pellegrino 19, Vietri sul Mare (SA), I-84019, Italy

Southworth, J.; Astrophysics Group, Keele University, Keele, ST5 5BG, United Kingdom

Mollière, P.; Leiden Observatory, Leiden University, PO Box 9513, Leiden, NL-2300 RA, Netherlands

Tregloan-Reed, J.; Centro de Astronomía (CITEVA), Universidad de Antofagasta, Avenida U. de Antofagasta, Antofagasta, 02800, Chile

Juvan, I. G.; Space Research Institute, Austrian Academy of Sciences, Schmiedlstrasse 6, Graz, A-8042, Austria, Institut für Geophysik Astrophysik und Meteorologie, Karl-Franzens- Universitt, Universitätsplatz 5, Graz, A-8010, Austria, Institut für Astro- und Teilchenphysik, Universität Innsbruck, Technikerstrasse 25, Innsbruck, A-6020, Austria

Chen, G.; Key Laboratory of Planetary Sciences, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing, 210008, China, Instituto de Astrofísica de Canarias, Vía Láctea s/n, La Laguna, Tenerife, E-38205, Spain

Sarkis, P.; Max Planck Institute for Astronomy, Königstuhl 17, Heidelberg, D-69117, Germany

Bruni, I.; INAF - Osservatorio Astronomico di Bologna, Via Ranzani 1, Bologna, I-40127, Italy

Ciceri, S.; Department of Astronomy, Stockholm University, AlbaNova SCFAB / Astronomi, Stockholm, SE-106 91, Sweden

Andersen, M. I.; Dark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, Copenhagen, DK-2100, Denmark, Niels Bohr Institute, Centre for Star and Planet Formation, University of Copenhagen, Øster Coldgade 5, Copenhagen K, DK-1350, Denmark

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Language :

English

Title :

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

Publication date :

2019

Journal title :

Monthly Notices of the Royal Astronomical Society

ISSN :

0035-8711

eISSN :

1365-2966

Publisher :

Oxford University Press, Oxford, United Kingdom

Volume :

485

Issue :

Pages :

5168-5179

Available on ORBi :

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