Geneva Observatory Web Page Geneva Planet Search Programmes

 
  Mu Ara: a system with 4 planets
  Last update: March the 5th 2007

 
 
 
 
  • "The HARPS search for southern extra-solar planets. VIII. mu Ara, a system with four planets"
    F. Pepe, A.C.M. Correia, M. Mayor, O. Tamuz, W. Benz, J.-L. Bertaux, F. Bouchy, J. Couetdic, J. Laskar, C. Lovis, D. Naef, D. Queloz, N.C. Santos, J.-P. Sivan, D. Sosnowska, S. Udry, 2007
    A&A 462, 769 (ADS)
  • "The HARPS search for southern extra-solar planets. II. A 14 Earth-mass exoplanet around mu Arae"
    N.C. Santos, F. Bouchy, M. Mayor, F. Pepe, D. Queloz, S. Udry, C. Lovis, M. Bazot, W. Benz, J.-L. Bertaux, G. Lo Curto, X. Delfosse, C. Mordasini, D. Naef, J.-P. Sivan, S. Vauclair, 2004
    A&A 426, L19 (ADS)
  • ESO Press Release

  •  
     
    Top: HARPS (red) + UCLES (blue) + CORALIE (green)
    phase folded velocities for mu Ara. From top to bottom:
    mu Ara c, mu Ara d, mu Ara e and mu Ara b
    Larger image
                
    HARPS phase-folded velocities for mu Ara c
    Velocities corrected for the signal of the 3 other planets.
    Larger image


  • Orbital solution (from Pepe et al. 2006, H=HARPS, U=UCLES, C=CORALIE):

    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 160691 b
    643.25
    +/- 0.90
    52365.6
    +/- 12.6
    0.128
    +/- 0.017
    -
    22.0
    +/- 7.0
    37.78
    +/- 0.40
    1.676
    1.497
    86 (H)+45 (U)
    +39 (C)
    1.41 (H), 3.34 (U)
    6.01 (C)
    HD 160691 c
    9.6386
    +/- 0.0015
    52991.1
    +/- 0.4
    0.172
    +/- 0.040
    -
    212.7
    +/- 13.3
    3.06
    +/- 0.13
    0.03321
    0.0909
    "
    "
    HD 160691 d
    310.55
    +/- 0.0.83
    52708.7
    +/- 8.3
    0.0666
    +/- 0.0122
    -
    189.6
    +/- 9.4
    14.91
    +/- 0.59
    0.5219
    0.9210
    "
    "
    HD 160691 e
    4205.8
    +/- 758.9
    52955.2
    +/- 521.8
    0.0985
    +/- 0.0627
    -
    57.6
    +/- 43.7
    21.79
    +/- 2.30
    1.814
    5.235
    "
    "


  • Stellar properties:

    Parameter
    Value
    Reference
    Sp. Type
    G5V
    Hipparcos
    pi (mas)
    65.5
    Hipparcos
    d (pc)
    15.3
    Hipparcos
    m_v (mag)
    5.12
    Hipparcos
    B-V (mag)
    0.694
    Hipparcos
    T_eff (K)
    5813
    Santos et al. 2004
    M_v (mag)
    4.20
    -
    L (L_sol)
    1.77
    -
    log(g) (CGS)
    4.25
    Santos et al. 2004
    M_1 (M_sol)
    1.10
    Santos et al. 2004
    log(R'HK)
    -5.034
    Santos et al. 2004
    P_rot (d)
    31
    Santos et al. 2004
    Vsini (km/s)
    2.4
    Santos et al. 2004
    Age (Gyr)
    >2
    Santos et al. 2004
    [Fe/H]
    0.32
    Santos et al. 2004


  • Links:
  • HD 160691 @ exoplanets.org
  • Independant detection of mu Ara d (from archive RV data): "About the extrasolar multi-planet system around HD160691"
    K. Gozdziewski, A. J. Maciejewski, C. Migaszewski, 2006, astro-ph/0608279
  • Paper revealing the presence of HD 160691 d: "Extrasolar planets around HD 196050, HD 216437 and HD 160691"
    H.R.A. Jones, R.P. Butler, G.W. Marcy, C.G. Tinney, A.J. Penny, C. McCarthy, B.D. Carter, 2002, MNRAS 337, 1170 -- ADS
  • HD 160691 b discovery paper: "Two New Planets from the Anglo-Australian Planet Search"
    R.P. Butler, C.G. Tinney, G.W. Marcy, H.R.A. Jones, A.J. penny, K. Apps, 2001, ApJ 555, 410 -- ADS

  • ----
    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