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  3 planets orbiting HD 181433
  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 181433
    Top: Phase-folded orbit of the outer planet
    Middle: Phase-folded orbit of the 962-d period 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 181433 b
    9.3743
    +/- 0.0019
    54542.0
    +/- 0.26
    0.396
    +/- 0.062
    202
    +/- 10
    40.2125
    +/- 0.0004
    2.94 +/- 0.23
    0.024
    7.5
    0.080
    107
    1.06
    HD 181433 c
    962.0
    +/- 15
    53235.0
    +/- 7.3
    0.28
    +/- 0.02
    21.4
    +/- 3.2
    "
    16.2 +/- 0.4
    0.64
    203
    1.76
    "
    "
    HD 181433 d
    2172
    +/- 158
    52154
    +/- 194
    0.48
    +/- 0.05
    -30
    +/- 13
    "
    11.3 +/- 0.9
    0.54
    171
    3.0
    "
    "


  • Stellar properties:

    Parameter
    Value
    Reference
    Sp. Type
    K3IV
    Hipparcos
    pi (mas)
    38.24
    Hipparcos
    d (pc)
    26.15
    Hipparcos
    m_v (mag)
    8.4
    Hipparcos
    B-V (mag)
    1.01
    Hipparcos
    T_eff (K)
    4962 +/- 134
    Sousa et al. 2008
    M_v (mag)
    6.31
    Bouchy et al. 2009
    L (L_sol)
    0.308 +/- 0.026
    Sousa et al. 2008
    log(g) (CGS)
    4.37 +/- 0.26
    Sousa et al. 2008
    M_1 (M_sol)
    0.78
    Sousa et al. 2008
    log(R'HK)
    -5.11
    Bouchy et al. 2009
    P_rot (d)
    54
    Bouchy et al. 2009
    Vsini (km/s)
    1.5
    Bouchy et al. 2009
    [Fe/H]
    0.33 +/- 0.13
    Sousa et al. 2008


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    stephane.udry@obs.unige.ch