WASP-3b: a strongly irradiated transiting gas-giant planet

Autoria(s): Pollacco, D.; Skillen, I.; Collier-Cameron, A.; Loeillet, B.; Stempels, H.C.; Bouchy, F.; Gibson, N.P.; Hebb, L.; Hebrard, G.; Yoshi, Y.C.; McDonald, I.; Smalley, B.; Smith, A.M.S.; Street, R.A.; Udry, S.; West, R.G.; Wilson, D.M.; Wheatley, P.J.; Aigrain, S.; Alsubai, K.; Benn, C.R.; Bruce, V.A.; Christian, D. J.; Clarkson, W.I.; Enoch, B.; Evans, A.; Fitzsimmons, A.; Haswell, C.A.; Hellier, C.; Hickey, S.; Hodgkin, S.T.; Horne, K.; Hrudkova, M.; Irwin, J.; Kane, S.R.; Keenan, F.; Lister, T.A.; Maxted, P.; Mayor, M.; Moutou, C.; Norton, A.J.; Osborne, J.P.; Parley, N.; Pont, F.; Queloz, D.; Ryans, R.; Simpson, E.
Data(s)

11/04/2008
Resumo

We report the discovery of WASP-3b, the third transiting exoplanet to be discovered by the WASP and SOPHIE collaboration. WASP-3b transits its host star USNO-B1.01256-0285133 every 1.846834 +/- 0.000002 d. Our high-precision radial velocity measurements present a variation with amplitude characteristic of a planetary-mass companion and in phase with the light curve. Adaptive optics imaging shows no evidence for nearby stellar companions, and line-bisector analysis excludes faint, unresolved binarity and stellar activity as the cause of the radial velocity variations. We make a preliminary spectroscopic analysis of the host star and find it to have Teff = 6400 +/- 100K and log g = 4.25 +/- 0.05 which suggests it is most likely an unevolved main-sequence star of spectral type F7-8V. Our simultaneous modelling of the transit photometry and reflex motion of the host leads us to derive a mass of 1.76+0.08-0.14 MJ and radius 1.31+0.07-0.14 RJ for WASP-3b. The proximity and relative temperature of the host star suggests that WASP-3b is one of the hottest exoplanets known, and thus has the potential to place stringent constraints on exoplanet atmospheric models.
Formato

application/pdf
Identificador

http://pure.qub.ac.uk/portal/en/publications/wasp3b-a-strongly-irradiated-transiting-gasgiant-planet(bd81feef-bc78-4049-8d44-3febb03c5cf9).html

http://dx.doi.org/10.1111/j.1365-2966.2008.12939.x

http://pure.qub.ac.uk/ws/files/16354451/1576.full.pdf
Idioma(s)

eng
Direitos

info:eu-repo/semantics/openAccess
Fonte

Pollacco , D , Skillen , I , Collier-Cameron , A , Loeillet , B , Stempels , H C , Bouchy , F , Gibson , N P , Hebb , L , Hebrard , G , Yoshi , Y C , McDonald , I , Smalley , B , Smith , A M S , Street , R A , Udry , S , West , R G , Wilson , D M , Wheatley , P J , Aigrain , S , Alsubai , K , Benn , C R , Bruce , V A , Christian , D J , Clarkson , W I , Enoch , B , Evans , A , Fitzsimmons , A , Haswell , C A , Hellier , C , Hickey , S , Hodgkin , S T , Horne , K , Hrudkova , M , Irwin , J , Kane , S R , Keenan , F , Lister , T A , Maxted , P , Mayor , M , Moutou , C , Norton , A J , Osborne , J P , Parley , N , Pont , F , Queloz , D , Ryans , R & Simpson , E 2008 , ' WASP-3b: a strongly irradiated transiting gas-giant planet ' Monthly Notices of the Royal Astronomical Society , vol 385 , no. 3 , pp. 1576-1584 . DOI: 10.1111/j.1365-2966.2008.12939.x
Palavras-Chave #/dk/atira/pure/subjectarea/asjc/1900/1912 #Space and Planetary Science
Tipo

article
Acesso ao item digital