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  HD 131664 b: a long-period 18 M_Jup companion with an eccentric orbit
  Last update: October 26 2008

 
 
  • "The HARPS search for southern extra-solar planets. XVII Six long-period giant planets around BD -17 0063, HD 20868, HD 73267, HD 131664, HD 145377 HD 153950"
    C. Moutou, M. Mayor, G. Lo Curto, S. Udry, F. Bouchy, W. Benz, C. Lovis, D. Naef, F. Pepe, D. Queloz, N.C. Santos, 2008
    A&A in press (atro-ph/0810.4662)

    •  
    Larger image
    HARPS radial-velocity data for HD 131664
    Top: Temporal velocities and fitted orbital solution.
    Bottom: Residuals to the fitted orbit.


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

    Object
    Period
    (days)
    T0
    (JD - 2 400 000)
    Eccentricity
    V
    (km/s)
    Omega
    (deg)
    K1
    (m/s)
    m2sini
    (M_Jup)
    a
    (AU)
    N
    Residuals
    (m/s)
    HD 131664 b
    1951
    +/-
    41
    52060
    +/-
    41
    0.638
    +/-
    0.02
    35.243
    +/-
    0.004
    149.7
    +/-
    1.0
    359.5
    +/-
    22.3
    18.15
    +/-
    0.35
    3.17
    +/-
    0.03
    41
    4.0


  • Stellar properties:

    Parameter
    Value
    Reference
    Sp. Type
    G3V
    Hipparcos
    pi (mas)
    18.04 +/- 0.73
    Hipparcos
    d (pc)
    55.43 +/- 2.3
    Hipparcos
    m_v (mag)
    8.13
    Hipparcos
    B-V (mag)
    0.667
    Hipparcos
    T_eff (K)
    5886 +/- 21
    Moutou et al. 2008
    M_v (mag)
    4.41
    Moutou et al. 2008
    L (L_sol)
    1.46 +/- 0.13
    Moutou et al. 2008
    log(g) (CGS)
    4.44 +/- 0.10
    Moutou et al. 2008
    M_1 (M_sol)
    1.10+/- 0.03
    Moutou et al. 2008
    R (R_sol)
    1.16
    Moutou et al. 2008
    log(R'HK)
    -4.82 +/- 0.07
    Moutou et al. 2008
    P_rot (d)
    22
    Moutou et al. 2008
    Vsini (km/s)
    2.9
    Moutou et al. 2008
    Age (Gyr)
    2.4 +/- 1.8
    Moutou et al. 2008
    [Fe/H]
    0.32 +/- 0.02
    Moutou et al. 2008


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    stephane.udry@obs.unige.ch