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J/MNRAS/422/14      Radial velocities of wide doubles        (Halbwachs+, 2012)
Double stars with wide separations in the AGK3 - I. The components
which are themselves spectroscopic binaries
    Halbwachs J.L., Mayor M., Udry S.
   <Mon. Not. R. Astron. Soc. 422, 14 (2012)>
   =2012MNRAS.422...14H
ADC_Keywords: Stars, double and multiple ; Binaries, spectroscopic ;
              Radial velocities
Keywords: binaries: spectroscopic ; brown dwarfs ; stars: low-mass


Abstract:
    Wide binaries are tracers of the gravity field of the Galaxy, but
    their study requires some caution. A large list of common proper
    motion stars selected from the third Astronomischen Gesellschaft
    Katalog (AGK3) was monitored with the CORAVEL (for COrrelation RAdial
    VELocities) spectrovelocimeter, in order to prepare a sample of
    physical binaries with very wide separations. 66 stars received
    special attention, since their radial velocities (RV) seemed to be
    variable. These stars were monitored over several years in order to
    derive the elements of their spectroscopic orbits. In addition, 10 of
    them received accurate RV measurements from the SOPHIE spectrograph of
    the T193 telescope at the Observatory of Haute-Provence.

    For deriving the orbital elements of double-lined spectroscopic
    binaries (SB2), a new method was applied, which assumed that the
    RV of blended measurements are linear combinations of the RV of the
    components. 13 SB2 orbits were thus calculated.

    The orbital elements were eventually obtained for 52 spectroscopic
    binaries (SB), two of them making a triple system. 40 SB received
    their first orbit and the orbital elements were improved for 10
    others. In addition, 11 SB were discovered with very long periods for
    which the orbital parameters were not found. The median period of the
    40 first orbits is 1yr, and several SB should be resolved or should
    receive an astrometric orbit in future, providing the masses of the
    components. In addition, it appeared that HD 153252 has a close
    companion, which is a candidate brown dwarf with a minimum mass of
    50 Jupiter masses.

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table1.dat        59       66   Summary of CPM stars observed
table2.dat        38     2275   Radial Velocities observed
orbit/*            0       50   Figures (eps) of velocity with phase
drift/*            0       17   Figures (eps) of velocity drifts


See also:
    I/121 : Common proper motions stars in AGK3 (Halbwachs, 1986)
    I/130 : LDS Catalogue: Doubles with Common Proper Motion (Luyten 1940-87)
    B/sb9 : 9th Catalogue of Spectroscopic Binary Orbits (Pourbaix+ 20141)
    I/61  : AGK3 Catalogue (Dieckvoss, Heckmann 1975)
  J/A+A/521/A4 : CPMDS catalogue (Gavras+, 2010)
  J/MNRAS/355/585 : New Northern common proper-motion pairs (Greaves, 2004)
  J/other/JDSO/6.30 : New Wide Common Proper Motion Binaries (Benavides+, 2010)


Byte-by-byte Description of file: table1.dat

   Bytes Format Units   Label     Explanations

       1  I1    ---     tno       [1/2] Table of CPM catalog (3)
   3-  5  I3    ---     CPM       Designation of CPM pair (3)
       6  A1    ---     m_CPM     [AB] Component designation (3)
   8- 15  A8    ---     AG        AGK3 designation of component
  17- 21  F5.2  mag     B-V       Color index
  23- 25  I3    ---     Nmes      Number of measurements
  28- 34  F7.3  km/s    <V>       Mean radial velocity of the star
  37- 41  F5.3  km/s    e_<V>     uncertainty in <V>
  43- 47  F5.3  ---     Pchi      [0/0.003] P(χ^2^) of constant velocity (1)
  49- 52  A4    ---     Var       Final variability status of the star (2)
      53  A1    ---     n_Var     [+]  RV measurements from other sources (4)
  55- 56  I2    h       RAh       Right ascension (B1950) of component (h)
  58- 59  I2    min     RAm       Right ascension (B1950) of component (m)

Note (1): P(χ2) is the probability of obtaining a χ2 larger
     than the one actually obtained, assuming the RV is constant in reality
     (computed from primary component).
Note (2): the following statuses are used:
  CST? = star that could have a constant RV
  VAR  = radial velocity seems to be variable,
   SB1 = at least part of the velocity curve of the primary is visible,
   SB2 = at least part of the velocity curves of both components is visible,
  SB1O = orbital elements of SB1 were derived
  SB2O = orbital elements of SB2 were derived
Note (3): the designation of a CPM star follows Halbwachs (1986, Cat. I/121):
   a table number (1 = physical binaries with a probability≥98.7%,
   2 = physical binaries with a probability≥60%) and a sequential number
   in this table.
Note (4): A "+" follows the variability status for SB1O or SB2O when RV
     measurements from an external source were taken into account to derive
     the orbital elements. These additional measurements were found in the
     SB9 online catalogue (Cat. B/sb9)


Byte-by-byte Description of file: table2.dat

   Bytes Format Units   Label   Explanations

       1  I1    ---     tno     [1/2] Table of CPM catalog (Cat. I/121)
   3-  5  I3    ---     CPM     Designation of CPM pair (Cat. I/121)
       6  A1    ---     m_CPM   [AB] Component designation
   8- 17  F10.4 d   JD-2400000  Observation epoch (BJD-2400000)
  19- 26  F8.3  km/s    RV      Radial velocity measured
  28- 32  F5.3  km/s    e_RV    Uncertainty of RV
      34  I1    ---     c       [0/2]? Component measured: blank for SB1;
                                1=primary, 2=secondary, 0=blend for SB2.
      36  A1    ---     f       [RF] flag on RV: R=Rejected, F=Fixed velocity
      38  A1    ---     T       Telescope used (1)

Note (1): Telescope coded as follows;
   C = 1m/CORAVEL at Haute-Provence Observatory;
   E = Euler/CORALIE telescope at La Silla, Chile
   S = 193cm/SOPHIE telescope at Haute-Provence Observatory
   T = 1m telescope of the Simeis Observatory in Crimea


Acknowledgements:
    Heinz Andernach (catalog #XXX in his collection)
(End)             Jean-Louis Halbwachs, Francois Ochsenbein [CDS]    23-Apr-2012