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HD 73256 page Geneva Observatory Web Page Geneva Planet Search Programmes


 
  A 2.55-d planet around HD 73256

Last update: September 8th 2003
 
 
 
 
 
  • "The CORALIE survey for southern extra-solar planets X: A Hot Jupiter orbiting HD 73256"
    S. Udry(1), M. Mayor(1), J.V. Clausen(2), L.M. Freyhammer(3), B.E. Helt(2), C. Lovis(1), D. Naef(1), E. Olsen(2), F. Pepe(1), D, Queloz(1), N.C. Santos(1,4), 2003, A&A 407, 679 html version (A&A subscription required)
    (1) Geneva Observatory, Geneva, Switzerland, (2) Niels Bohr Institute for Astronomy, Copenhagen, Denmark, (3) Royal Observatory of Belgium, Brussel, Belgium, (4) Observatorio Astronomico de Lisboa, Lisbon, Portugal


    • Larger image (376 kb)


  • Orbital solution (from Udry et al. 2003):

    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 73256
    2.54858 +/- 0.00016
    52500.18 +/- 0.28
    0.029 +/- 0.02
    29.729 +/- 0.005
    337.3 +/- 45.8
    269 +/- 8
    1.87
    0.037
    40
    14.8


  • Remark: The structure in the RV residuals and the photometric variation of the star luminosity are shown to be due to activity-induced spots

  • Stellar properties:

    Parameter
    Value
    Reference
    Sp. Type
    G8/K0
    Hipparcos
    pi (mas)
    27.38
    Hipparcos
    d (pc)
    36.5
    Hipparcos
    m_v (mag)
    8.08
    Hipparcos
    B-V (mag)
    0.782
    Hipparcos
    T_eff (K)
    5570 +/- 40
    Udry et al. 2003
    M_v (mag)
    5.27
    -
    L (L_sol)
    0.69
    -
    log(g) (CGS)
    4.66 +/- 0.10
    Udry et al. 2003
    M_1 (M_sol)
    1.05
    Geneva models, Schaerer et al. 1993
    log(R'HK)
    -4.49
    Henry et al. 1996
    P_rot (d)
    13.9
    Noyes et al. 1984
    Vsini (km/s)
    3.22
    Coralie, Udry et al. 2003
    Age (Gyr)
    0.83
    Donahue 1993
    [Fe/H]
    0.29 +/- 0.05
    Udry et al. 2003

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    stephane.udry@obs.unige.ch

    Creative Commons License Copyright © Michael Richmond. This work is licensed under a Creative Commons License.