Geneva Observatory Web Page Geneva Planet Search Programmes

 
  Low-mass planets around HD 47186
  Last update: January 8 2009

 
 
  • "The HARPS search for southern extra-solar planets. XVII. Super-Earth and Neptune-mass planets in multiple planet systems HD47186 and HD181433"
    F. Bouchy, M. Mayor, C. Lovis, S. Udry, W. Benz, J.-L. Bertaux, X. Delfosse, C. Mordasini, F. Pepe, D. Queloz, D. Ségransan, 2009
    A&A submitted (astro-ph/0812.1608)
  • Announced during the "Extra-solar Super-Earths" conference held in Nantes (F), June 16-18 2008

    •  
    Larger image
    HARPS radial-velocity data for HD 47186
    Top: Phase-folded orbit of the outer planet
    Bottom: Phase-folded orbit of the inner planet


  • Orbital solution (from Bouchy et al. 2009):

    Object
    Period
    (days)
    T0
    (JD - 2 400 000)
    Eccentricity
    Omega
    (deg)
    V
    (km/s)
    K1
    (m/s)
    m2sini
    (M_Jup)
    m2sini
    (M_Earth)
    a
    (AU)
    N
    Residuals
    (m/s)
    HD 47186 b
    4.0845
    +/- 0.0002
    54566.95
    +/- 0.36
    0.038
    +/- 0.020
    59
    +/- 32
    4.3035
    +/- 0.0014
    9.12 +/- 0.18
    0.07167
    22.78
    0.050
    66
    0.91
    HD 47186 c
    1353.6
    +/- 57.1
    52010
    +/- 180
    0.249
    +/- 0.073
    26
    +/- 23
    "
    6.65 +/- 1.43
    0.35061
    111.42
    2.395
    "
    "


  • Stellar properties:

    Parameter
    Value
    Reference
    Sp. Type
    G5V
    Hipparcos
    pi (mas)
    26.43
    Hipparcos
    d (pc)
    37.84
    Hipparcos
    m_v (mag)
    7.6
    Hipparcos
    B-V (mag)
    0.71
    Hipparcos
    T_eff (K)
    5675 +/- 21
    Sousa et al. 2008
    M_v (mag)
    4.74
    Bouchy et al. 2009
    L (L_sol)
    1.08 +/- 0.029
    Sousa et al. 2008
    log(g) (CGS)
    4.36 +/- 0.04
    Sousa et al. 2008
    M_1 (M_sol)
    0.99
    Sousa et al. 2008
    log(R'HK)
    -5.01
    Bouchy et al. 2009
    P_rot (d)
    33
    Bouchy et al. 2009
    Vsini (km/s)
    2.2
    Bouchy et al. 2009
    [Fe/H]
    0.23 +/- 0.02
    Sousa et al. 2008


  • Links:

    ----
    Group Logo
    Extrasolar planet page

    Group Logo
    Planet Search and Stellar Kinematics group page

    Geneva Observatory Logo
    Geneva observatory

    Geneva University banner
    University of Geneva

     

    stephane.udry@obs.unige.ch