Bibcode
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, Th; 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, O.
Referencia bibliográfica
Monthly Notices of the Royal Astronomical Society, Volume 485, Issue 4, p.5168-5179
Fecha de publicación:
6
2019
Número de citas
17
Número de citas referidas
16
Descripción
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.