%0 Journal Article
%T A hot Jupiter around the very active weak-line T Tauri star TAP 26
%+ Institut de recherche en astrophysique et planétologie (IRAP)
%+ York University
%+ Canada-France-Hawaii Telescope Corporation (CFHT)
%+ Crimean Astrophysical Observatory (CrAO)
%+ ESO Garching
%+ University of St Andrews [Scotland]
%+ School of Physics [TCD Dublin]
%+ ICEx - UFMG
%+ Institut de Planétologie et d'Astrophysique de Grenoble (IPAG)
%+ Academia Sinica
%+ Kavli Institute for Astronomy and Astrophysics [Beijing] (KIAA-PKU)
%+ Laboratoire Univers et Particules de Montpellier (LUPM)
%A Yu, L.
%A Donati, J. -F.
%A Hébrard, E.
%A Moutou, C.
%A Malo, L
%A Grankin, K
%A Hussain, G.
%A Cameron, A. C.
%A Vidotto, A. A.
%A Baruteau, C.
%A Alencar, S. H. P.
%A Bouvier, J.
%A Petit, P.
%A Takami, M.
%A Herczeg, G. J.
%A Gregory, S. G.
%A Jardine, M.
%A Morin, Julien
%A Ménard, F.
%Z 25 pages, 3 appendices, 27 figures, 10 tables
%< avec comité de lecture
%Z LUPM:17-006
%@ 0035-8711
%J Monthly Notices of the Royal Astronomical Society
%I Oxford University Press (OUP): Policy P - Oxford Open Option A
%V 467
%N 2
%P 1342-1359
%8 2017-05-01
%D 2017
%Z 1701.01512
%Z 2017MNRAS.467.1342Y
%R 10.1093/mnras/stx009
%K magnetic fields
%K techniques: polarimetric
%K planets and satellites: formation
%K stars: imaging
%K stars: individual: TAP 26
%K stars: rotation
%Z Sciences of the Universe [physics]/Astrophysics [astro-ph]/Solar and Stellar Astrophysics [astro-ph.SR]
%Z Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP]Journal articles
%X We report the results of an extended spectropolarimetric and photometric monitoring of the weak-line T Tauri star TAP 26, carried out within the MaTYSSE programme with the ESPaDOnS spectropolarimeter at the 3.6 m Canada-France-Hawaii Telescope. Applying Zeeman-Doppler Imaging to our observations, concentrating in 2015 November and 2016 January and spanning 72 d in total, 16 d in 2015 November and 13 d in 2016 January, we reconstruct surface brightness and magnetic field maps for both epochs and demonstrate that both distributions exhibit temporal evolution not explained by differential rotation alone. We report the detection of a hot Jupiter (hJ) around TAP 26 using three different methods, two using Zeeman-Doppler Imaging (ZDI) and one Gaussian-Process Regression (GPR), with a false-alarm probability smaller than 6.10^-4. However, as a result of the aliasing related to the observing window, the orbital period cannot be uniquely determined; the orbital period with highest likelihood is 10.79 +/- 0.14 d followed by 8.99 +/- 0.09 d. Assuming the most likely period, and that the planet orbits in the stellar equatorial plane, we obtain that the planet has a minimum mass M.sin(i) of 1.66 +/- 0.31 M_Jup and orbits at 0.0968 +/- 0.0032 au from its host star. This new detection suggests that disc type II migration is efficient at generating newborn hJs, and that hJs may be more frequent around young T Tauri stars than around mature stars (or that the MaTYSSE sample is biased towards hJ-hosting stars).
%G English
%Z MaTYSSE
%2 https://hal.science/hal-01769730/document
%2 https://hal.science/hal-01769730/file/1701.01512.pdf
%L hal-01769730
%U https://hal.science/hal-01769730
%~ IN2P3
%~ IRD
%~ INSU
%~ METEO
%~ UNIV-SAVOIE
%~ UNIV-TLSE3
%~ UGA
%~ CNRS
%~ INPG
%~ IRSTEA
%~ CNES
%~ OSUG
%~ OMP
%~ OMP-IRAP
%~ LUPM
%~ IPAG
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