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J/A+A/312/93       Cataclysmic variables systemic-velocity (van Paradijs+, 1996)
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The systemic-velocity distribution of cataclysmic variables
     Van Paradijs J., Augusteijn T., Stehle R.
    <Astron. Astrophys. 312, 93 (1996)>
    =1996A&A...312...93V      (SIMBAD/NED BibCode)
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ADC_Keywords: Binaries, cataclysmic ; Radial velocities
Keywords: accretion, accretion disks - cataclysmic variables -
          stars: kinematics; distances

Description:
    We have collected {gamma} velocities of cataclysmic variables from a
    survey of published orbital radial-velocity studies. We argue that for
    the non-magnetic cataclysmic variables the {gamma} distribution gives
    a fair description of the systemic radial velocities; for magnetic
    cataclysmic variables the effect of motions within the system appears
    to be substantial. Assuming that the distribution of the spatial
    velocities of cataclysmic variables in the solar neighbourhood follows
    the velocity ellipsoid, with dispersions as given by Wielen (1977), we
    estimate that the dispersion of z-velocities of CVs is in the range 16
    to 21km/s. With the galactic potential of Kuijken and Gilmore (1989)
    we then derive the distribution of distances, z, above the galactic
    plane. This distribution has an exponential scale height in the range
    160-230pc, which is nearly a factor of two larger than that obtained
    for the z distribution of systems with known distances. This probably
    reflects the incompleteness of the census of cataclysmic variables at
    distances even as small as ~100pc. The velocity distribution of
    cataclysmic variables indicates that they are an old disk population,
    with a mix of ages up to 10Gyr.

File Summary:
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  FileName      Lrecl  Records   Explanations
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ReadMe             80        .   This file
table1             70      126   Radial velocities of cataclysmic variables
table1.tex         80      333   LaTeX version of table1
refs               67      161   References
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See also:
    V/82 : Cataclysmic binaries (Ritter & Kolb, 1995)

Byte-by-byte Description of file: table1
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   Bytes Format Units   Label     Explanations
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   1- 12  A12   ---     Name      Source name
  14- 19  A6    ---     Type      Type (1)
  22- 25  I4    km/s    RV        Radial velocity
      26  A1    ---   u_RV        Uncertainty flag on radial velocity
  28- 48  A21   ---     Ref       Reference codes (see refs file)
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Note (1): the types are:
     AM  AM Herculis (subtype cataclysmic variables)
     DN  Dwarf Nova (subtype cataclysmic variables)
     DQ  DQ Herculis (subtype cataclysmic variables)
     IP  Intermediate Polars
     NA  Novae A type
     NB  Novae B type
     NL  Nova like objects
     SU  SU Ursae Majoris (subtype cataclysmic variables)
     UG  U Geminorum (subtype cataclysmic variables)
     UX  UX Ursae Majoris (subtype cataclysmic variables)
     ZC  Z Camelopardalis (subtype cataclysmic variables)
  For more information see:
   B. Warner, 'Cataclysmic Variables', Cambridge University Press (1995) or
   H. Ritter and U. Kolb, in 'X-ray Binaries', Eds W.H.G. Lewin,
   J. van Paradijs, & E.P.J. van den Heuvel, Cambridge University Press (1995)
   (catalog <V/82>)
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Byte-by-byte Description of file: refs
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   Bytes Format Units   Label     Explanations
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   1-  3  I3    ---     Ref       Reference number
   7- 65  A59   ---     Text      Text of reference
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(End)                                         Patricia Bauer [CDS]   02-Feb-1996