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  WASP-11b: A low-mass transiting planet
  Last update: October 12 2008

 
 
  • ""
    R.G. West, A. Collier Cameron, L. Hebb, Y.C. Joshi, D. Pollacco, E. Simpson, I. Skillen, H.C. Stempels, P.J. Wheatley, D. Wilson, D. Anderson, S. Bentley, F. Bouchy, B. Enoch, N. Gibson, G. Hébrard, C. Hellier, B. Loeillet, M. Mayor, P. Maxted, I. McDonald, C. Moutou, F. Pont, D. Queloz, A.M.S. Smith, B. Smalley, R.A. Street, S. Udry, 2008
    A&A submitted (astro-ph/0809.4597) --> Transit light curve & RV orbit
  • Announced during the 2008 RAS National Astronomy Meeting
  • Planet also detected by the HAT Network: HAT-P-10b, see Bakos et al.


    		•
    WASP-11 lightcurve and radial-velocity orbit
    Top: SuperWASP discovery lightcurve
    and follow-up photometric data.
    Bottom: SOPHIE+FIES phase-folded
    radial-velocities and fitter orbit.
    Larger image


  • Orbital solution (from West et al. 2008):

    Object
    Period
    [days]
    T_trans
    [JD - 2400000]
    Eccentricity
    V
    [km/s]
    Omega
    [deg]
    K1
    [m/s]
    a
    [AU]
    N_RV
    WASP-11b
    3.722465
    +0.000006 /-0.000008
    54473.05586
    +/- 0.0002
    0.0
    (fixed)
    4.9077
    +/- 0.0015
    0.0
    (fixed)
    82.1
    +/- 7.4
    0.043
    +/- 0.002
    13 = 6 (FIES)+
    7 (SOPHIE)


  • Other parameters (from West et al. 2008):

    Planet mass
    [M_Jup]
    0.53 +/- 0.07
    Planet radius
    [R_Jup]
    0.91 +0.06 /-0.03
    Planet density
    [rho_Jup]
    0.69 +0.07 /-0.11
    Planet surface gravity (log scale)
    [CGS]
    3.16 +0.04 /-0.05
    Planet equ. temperature (Albedo=0)
    [K]
    960 +/- 70
    Orbital inclination
    [deg]
    89.8 +0.2 /- 0.8
    Impact parameter
    -
    0.054 +0.168 /- 0.050
    Transit duration
    [hour]
    2.556 +0.029 /- 0.007


  • Stellar properties:

    Parameter
    Value
    Reference
    Sp. Type
    K3V
    West et al. 2008
    m_v [mag]
    11.7
    West et al. 2008
    Distance [pc]
    125 +5 /-6
    Bakos et al. 2008
    T_eff [K]
    4800 +/- 100
    West et al. 2008
    log(g) [CGS]
    4.45 +/-0.20
    West et al. 2008
    M_1 [M_Sun]
    0.77 +0.10 /-0.08
    West et al. 2008
    [M/H]
    0.0 +/- 0.2
    West et al. 2008
    R [R_Sun]
    0.74 +0.04 /- 0.03
    West et al. 2008
    Vsini [km/s]
    <6
    West et al. 2008


  • Links:
  • superWASP home page
  • G. Bakos's HATNet page

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    stephane.udry@obs.unige.ch