A1 Refereed original research article in a scientific journal

Physical properties and transmission spectrum of the WASP-80 planetary system from multi-colour photometry




AuthorsMancini L., Southworth J., Ciceri S., Dominik M., Henning Th., Jørgensen U.G., Lanza A.F., Rabus M., Snodgrass C., Vilela C., Alsubai K.A., Bozza V., Bramich D.M., Calchi Novati S., D'Ago G., Figuera Jaimes R., Galianni P., Gu S.-H., Harpsøe K., Hinse T., Hundertmark M., Juncher D., Kains N., Korhonen H., Popovas A., Rahvar S., Skottfelt J., Street R., Surdej J., Tsapras Y., Wang X.-B., Wertz O.

PublisherEDP Sciences

Publishing placeLes Ulis Cedex A

Publication year2014

JournalAstronomy and Astrophysics

Journal acronymA&A

Article numberA126

Volume562

Number of pages9

ISSN1432-0746

eISSN1432-0746

DOIhttps://doi.org/10.1051/0004-6361/201323265(external)


Abstract

WASP-80 is one of only two systems known to contain a hot Jupiter which transits its M-dwarf host star. We present eight light curves of one transit event, obtained simultaneously using two defocussed telescopes. These data were taken through the Bessell I, Sloan g'r'i'z' and near-infrared JHK passbands. We use our data to search for opacity-induced changes in the planetary radius, but find that all values agree with each other. Our data are therefore consistent with a flat transmission spectrum to within the observational uncertainties. We also measure an activity index of the host star of log R 'HK = -4.495, meaning that WASP-80 A shows strong chromospheric activity. The non-detection of starspots implies that, if they exist, they must be small and symmetrically distributed on the stellar surface. We model all available optical transit light curves and obtain improved physical properties and orbital ephemerides for the system.




Last updated on 2024-26-11 at 11:59