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J/ApJ/500/714       Color-magnitude relation in CL 1358+62    (Van Dokkum+ 1998)
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The color-magnitude relation in CL 1358+62 at z = 0.33:
evidence for significant evolution in the S0 population.
       Van Dokkum P.G., Franx M., Kelson D.D., Illingworth G.D., Fisher D.,
       Fabricant D.
      <Astrophys. J. 500, 714 (1998)>
      =1998ApJ...500..714V      (SIMBAD/NED BibCode)
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ADC_Keywords: Clusters, galaxy ; Photometry
Keywords: galaxies: clusters: individual: CL 1358+6345 -
          galaxies: elliptical and lenticular, cD - galaxies: evolution -
          galaxies: photometry - galaxies: spiral

Abstract:
    We use a large, multicolor mosaic of HST WFPC2 images to measure the
    colors and morphologies of 194 spectroscopically confirmed members of
    the rich galaxy cluster CL 1358+62 at z=0.33. We study the
    color-magnitude (CM) relation as a function of radius in the cluster
    to a limit of 4.6' from the center, equivalent to 1.6h^-1^_50_Mpc. The
    intrinsic scatter in the rest-frame B-V CM relation of the elliptical
    galaxies is very small, ~0.022mag. The CM relation of the ellipticals
    does not depend significantly on the distance from the cluster center.
    In contrast, the CM relation for the S0 galaxies does depend on
    radius: the S0's in the core follow a CM relation similar to that of
    the ellipticals, but at large radii (R>0.7h^-1^_50_Mpc) the S0's are
    systematically bluer and the scatter in the CM relation approximately
    doubles, to ~0.043mag. The blueing of the S0's at large radii is
    significant at the 95% confidence level. These results imply that the
    S0 galaxies in the outer parts of the cluster have formed stars more
    recently than the S0's in the inner parts.

Objects:
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       RA   (2000)   DE    Designation(s)
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      13 59 54  +62 30.6   ClG 1358+62 = ZwCl 1358+6245 = 2E 1358.3+6246
    ---------------------------------------------------------------------

File Summary:
--------------------------------------------------------------------------------
  FileName      Lrecl  Records   Explanations
--------------------------------------------------------------------------------
ReadMe             80        .   This file
table1.dat         54      194   CL 1358+62 galaxies catalog
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See also:
   J/ApJ/498/195 : Spectroscopic survey of CL 1358+62    (Fisher+ 1998)

Byte-by-byte Description of file: table1.dat
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   Bytes Format Units   Label        Explanations
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   1-  4  I4    ---     FFF98        Identification number ([FFF98] NNNN)
   6- 11  F6.1  arcsec  xpos         X position (1)
  13- 18  F6.1  arcsec  ypos         Y position (1)
  20- 23  A4    ---     MType        Morphological type
      25  I1    ---     n            [1/4] Dimension of the model law (2)
  27- 31  F5.2  mag     F814W        F814W colour
  33- 37  F5.2  mag     Vzmag        V_z_ magnitude (3)
  39- 43  F5.3  mag     F606W-F814W  F606W-F814W colour index
  45- 49  F5.3  mag     (B-V)z       (B-V)_z_ colour index (3)
  51- 54  F4.2  arcsec  rc           Aperture radius
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Note (1): Positions are given with respect to the brightest cluster galaxy
           (number 375) at RA=13h58m20.7s, DE=+62{deg}45'33" (1950), with
           positive x to the west and positive y to the north
Note (2): All images of the cluster galaxies were fitted with two-dimensional
           r^1/n^ law models.
Note (3):     V_z_= F814W + 0.20(F606W-F814W) + 0.65
          (B-V)_z_= 0.82(F606W-F814W) - 0.13
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History: From ApJ electronic version
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(End)                           James Marcout, Patricia Bauer [CDS]  31-Aug-1998