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

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Date
02/2014
Author
Mancini, L.
Southworth, J.
Ciceri, S.
Dominik, Martin
Henning, Th.
Jorgensen, U. G.
Lanza, A. F.
Rabus, M.
Snodgrass, C.
Vilela, C.
Alsubai, Khalid Abdulla T
Bozza, V.
Bramich, Daniel Martyn
Novati, S. Calchi
D'Ago, G.
Figuera Jaimes, Roberto Jose
Grant, Pasquale
Gu, S. -H.
Harpsoe, K.
Hinse, T.
Hundertmark, Markus Peter Gerhard
Juncher, D.
Kains, Noé
Korhonen, H.
Popovas, A.
Rahvar, S.
Skottfelt, J.
Street, R.
Surdej, J.
Tsapras, Yiannis
Wang, X. -B.
Wertz, O.
Funder
The Royal Society
Science & Technology Facilities Council
Grant ID
UF100010 / UF130581
PP/F000065/1
Keywords
Planetary systems
Stars: fundamental parameters
Stars: individual: WASP-80
Techniques: photometric
Transiting extrasolar planets
Earth GJ 1214B
Stellar evolution database
Hubble-space-telescope
Hot Jupiters
Tidal-evolution
Cool stars
Atmosphere
Models
Mass
QB Astronomy
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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-80A 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.
Citation
Mancini , L , Southworth , J , Ciceri , S , Dominik , M , Henning , T , Jorgensen , U G , Lanza , A F , Rabus , M , Snodgrass , C , Vilela , C , Alsubai , K A T , Bozza , V , Bramich , D M , Novati , S C , D'Ago , G , Figuera Jaimes , R J , Grant , P , Gu , S -H , Harpsoe , K , Hinse , T , Hundertmark , M P G , Juncher , D , Kains , N , Korhonen , H , Popovas , A , Rahvar , S , Skottfelt , J , Street , R , Surdej , J , Tsapras , Y , Wang , X -B & Wertz , O 2014 , ' Physical properties and transmission spectrum of the WASP-80 planetary system from multi-colour photometry ' , Astronomy & Astrophysics , vol. 562 , A126 . https://doi.org/10.1051/0004-6361/201323265
Publication
Astronomy & Astrophysics
Status
Peer reviewed
DOI
https://doi.org/10.1051/0004-6361/201323265
ISSN
0004-6361
Type
Journal article
Rights
Credit: Mancini et al, A&A, 562, A126, 2014, reproduced with permission, © ESO
Collections
  • University of St Andrews Research
URI
http://hdl.handle.net/10023/5189

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