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  A planet and a brown dwarf in orbit around HD 168443


  Last update: January the 8th 2005

 
 
 
  • "The CORALIE survey for southern extra-solar planets VIII. The very low-mass companions of HD 141937, HD 162020, HD 168443, HD 202206: Brown dwarfs or "superplanets"
    S. Udry, M. Mayor, D. Naef, F. Pepe, D. Queloz, N.C. Santos, M. Burnet, 2002
    A&A 390, 267 (ADS)
  • Proceedings of the "Planetary Systems in the Univers" IAU Symp. 202, Manchester, Aug. 2000, (Udry et al.)
  • Marcy et al. 1999: Short-period planet discovery paper (green points on the diagram)

    • Hires data: green open circles; Coralie data: red filled circles
    Top: Fitted orbital solution to the data
    Bottom: Residuals around the combined solution
    Larger image (374 kb)


  • Orbital solution (from Udry et al. 2002):

    Object
    Period
    (days)
    T0
    (JD - 2 400 000)
    Eccentricity
    V
    (km/s)
    Omega
    (deg)
    K1
    (km/s)
    m2sini
    (M_Jup)
    a
    (AU)
    N
    Residuals
    (m/s)
    HD 168443 b
    58.116 +/- 0.001
    51616.36 +/- 0.02
    0.529 +/- 0.002
    -48.647 +/- 0.002
    171.61 +/- 0.22
    0.4757 +/- 0.0013
    7.7
    0.29
    72 (CORALIE) + 30 (HIRES)
    8.1 (CORALIE)
    HD 168443 c
    1739.5 +/- 3.98
    52014.5 +/- 3.6
    0.228 +/- 0.005
    "
    63.67 +/- 0.84
    0.2938 +/- 0.0023
    16.9
    2.85
    "
    "


  • Stellar properties:

    Parameter
    Value
    Reference
    Sp. Type
    G8IV
    Marcy et al. 1999
    pi (mas)
    26.40
    Hipparcos
    d (pc)
    37.88
    Hipparcos
    m_v (mag)
    6.92
    Hipparcos
    B-V (mag)
    0.724
    Hipparcos
    T_eff (K)
    5555 +/- 40
    Gonzalez et al. 2001
    M_v (mag)
    4.03
    -
    L (L_sol)
    2.17
    -
    log(g) (CGS)
    4.10 +/- 0.12
    Gonzalez et al. 2001
    M_1 (M_sol)
    1.01
    Marcy et al. 1999
    log(R'HK)
    -4.8
    Coralie
    P_rot (d)
    26.8
    Noyes et al. 1984
    Vsini (km/s)
    1.7
    Coralie
    Age (Gyr)
    2.7
    Donahue 1993
    [Fe/H]
    0.10 +/- 0.03
    Gonzalez et al. 2001


  • Links:
  • HD 168443 @ exoplanets.org (Detection of HD 168443 b, independant discovery of HD 168443 c)

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    stephane.udry@obs.unige.ch