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  WASP-2b: A transiting planet
  Last update: March 5, 2007

 
 
  • WASP-1b and WASP-2b: Two new transiting exoplanets detected with SuperWASP and SOPHIE
    A. Collier Cameron, F. Bouchy, G. Hébrard, P. Maxted, D. Pollacco, F. Pont, I. Skillen, B. Smalley, R. A. Street, R.G. West, D.M. Wilson, S. Aigrain, D.J. Christian, W.I. Clarkson, B. Enoch, A. Evans, A. Fitzsimmons, M. Fleenor, M. Gillon, C.A. Haswell, L. Hebb, C. Hellier, S.T. Hodgkin, K. Horne, J. Irwin, S.R. Kane, F.P. Keenan, B. Loeillet, T.A. Lister, M. Mayor, C. Moutou, A.J. Norton, J. Osborne, N. Parley, D. Queloz, R. Ryans, A.H.M.J. Triaud, S. Udry, P.J. Wheatley, 2007
    MNRAS 375, 951 (ADS) --> Transit light curve & RV orbit


    •  
    Radial velocities obtained with SOPHIE for WASP-2 (dots) and fitted
    Keplerian orbit (solid curve). From Collier-Cameron et al. 2006.
    Larger image (139kb)
     
    WASP-2 phase-folded SOPHIE radial velocities (dots) and fitted
    Keplerian orbit (solid curve). From Collier-Cameron et al. 2006.
    Larger image (136kb)

    WASP-2 transit light curve. SuperWASP photometric data obtained in 2004 (crosses) are
    displayed together with OFXB measurements (filled dots) taken in September 2006.
    The solid line shows the best fitted transit model. From Collier-Cameron 2006.
    Larger image (137kb)


  • Orbital solution (from Collier Cameron et al. 2006):

    Object
    Period
    [days]
    T_trans
    [JD - 2400000]
    Eccentricity
    V
    [km/s]
    Omega
    [deg]
    K1
    [m/s]
    m_p
    [M_Jup]
    R_p
    [R_Jup)]
    a
    [AU]
    N
    WASP-2b
    2.152226
    +/-
    0.000004
    53991.5146
    +/-
    0.0010
    0.0 (fixed)
    -27.863
    +/-
    0.007
    0.0 (fixed)
    155 +/- 7
    0.81--0.95
    +/-
    0.04
    0.65--1.26
    0.0296--0.0318
    9


  • Stellar properties:

    Parameter
    Value
    Reference
    Sp. Type
    K1V
    Collier Cameron et al. 2006
    m_v [mag]
    11.98
    Collier Cameron et al. 2006
    T_eff [K]
    5200 +/- 200
    Collier Cameron et al. 2006
    M_v [mag]
    6.2 +/- 0.5
    Collier Cameron et al. 2006
    log(g) [CGS]
    4.3 +/- 0.3
    Collier Cameron et al. 2006
    M_1 [M_Sun]
    0.79 +0.15/-0.04
    Collier Cameron et al. 2006
    R [R_Sun]
    0.78 +/- 0.06
    Collier Cameron et al. 2006


  • Links:
  • superWASP home page
  • SOPHIE @ OHP
  • Observatoire Francois-Xavier Bagnoud, St Luc

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    stephane.udry@obs.unige.ch