CDROM/AJ/V104/P2078     cD Galaxy in Abell 2107 (Oegerle & Hill 1992)
================================================================================
Structure, Rotation, and the Peculiar Velocity cD Galaxy in Abell 2107
      William R. Oegerle & John M. Hill
      <1992, AJ, 104, 2078>
      =1992AJ....104.2078C
================================================================================

Abstract:
  As part of a program to study the kinematics of cD clusters of
  galaxies, we have measured the radial velocities of 75 galaxies in the
  field of Abell 2107.  Sixty-eight of these galaxies are cluster
  members.  The mean observed velocity of A2105 is 12335 +/- 86 km/s and
  the velocity dispersion is 672 [+67,-52] km/s.  The cD galaxy has a
  peculiar velocity of 270 km/s with respect to the cluster mean.  The
  distribution of velocities is well fitted by a Gaussian, but the
  velocities are spatially correlated.  We have investigated simple
  two-body subcluster models for A2107, which are consistent with the
  observed data and account for the peculiar velocity of the cD galaxy.
  Alternatively, the spatial distribution of velocities is also
  consistent with rotation of a single cluster at the 98% confidence
  level. However, the pure rotation model fails to explain the peculiar
  velocity of the cD galaxy, which lies at the center of the cluster.


File Summary:
--------------------------------------------------------------------------------
File Name    Lrecl    Records    Explanations
--------------------------------------------------------------------------------
table1.dat      57         75    Velocity data
--------------------------------------------------------------------------------

Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
   Bytes Format  Units    Label    Explanations
--------------------------------------------------------------------------------
   1- 3   I3     ---       Num     Identifying number
   4- 6   F3.0   h         RAh     Hour of RA (J2000)
   7- 9   F3.0   min       RAm     Min of RA
  10-15   F6.2   s         RAs     Sec of RA
  16      A1     ---       DE-     Sign dec.
  17-18   F2.0   deg       DEd     Degrees of dec. (J2000)
  19-21   F3.0   arcmin    DEm     Arcminutes of dec
  22-26   F5.1   arcsec    DEs     Arcseconds of dec
  27-32   I6     km/s      V       Observed heliocentric-corrected velocity
  33-57   A25    ---       Comment Comments on presence of emission lines and 
                                   the galaxies used as correlation templates
--------------------------------------------------------------------------------

================================================================================
(End)                                             Lee Brotzman [ADS] 22-Feb-1995