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J/MNRAS/345/1       Shape of CL 1358+62 galaxies             (Moller+, 2003)
Discs in early-type lensing galaxies: effects on magnification ratios and
measurements of H0.
    Moller O., Hewett P., Blain A.W.
   <Mon. Not. R. Astron. Soc. 345, 1 (2003)>
   =2003MNRAS.345....1M
ADC_Keywords: Clusters, galaxy ; Morphology

Keywords: methods: numerical - gravitational lensing -
          galaxies: elliptical and lenticular, cD - galaxies: formation -
          dark matter - distance scale

Abstract:
    Observations of early-type galaxies, both in the local Universe and in
    clusters at medium redshifts, suggest that these galaxies often
    contain discs or disc-like structures. Using the results of Kelson et
    al. (2000ApJ...531..137K) for the incidence of disc-components among
    the galaxies in the redshift z=0.33 cluster CL 1358+62, we investigate
    the effect of disc structures on the lensing properties of early-type
    galaxies. Statistical properties, like magnification cross-sections
    and the expected number of quad (four-image) lens systems, are not
    affected greatly by the inclusion of discs that contain less than ∼10
    per cent of the total stellar mass.

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
tablea1.dat       88       53   Galaxies in CL 1358+62.


See also:
   J/ApJ/498/195 : Spectroscopic survey of CL 1358+62 (Fisher+ 1998)
   J/ApJ/500/714 : Color-magnitude relation in CL 1358+62 (Van Dokkum+ 1998)


Byte-by-byte Description of file: tablea1.dat

   Bytes Format Units       Label   Explanations

   1-  3  I3    ---        [FFF98]  Sequential number
   5-  9  A5    ---         MType   Morphological type
  11- 15  F5.2  mag/arcsec2 <Ih>B   Mean surface brightness at the half-light
                                     radius of the bulge (1)
  17- 21  F5.3  arcsec      rhB     Half-light radius of the bulge (1)
  23- 27  F5.3  mag/arcsec2 SbB     Central surface mass density of the bulge
  29- 33  F5.3  arcsec      ReB     Einstein radius of the bulge
  35- 40  F6.3  mag/arcsec2 <Ih>    Mean surface brightness at the half-light
                                     radius of bulge and disc (1)
  41- 45  F5.3  arcsec      rh      Half-light radius of the bulge and disc (1)
  47- 51  F5.3  mag/arcsec2 Sb      Central surface mass density of the bulge
                                     and disc
  53- 57  F5.2  mag/arcsec2 <Ihd>   Mean surface brightness within the
                                     half-light radius of the bulge and disc (1)
  59- 63  F5.3  arcsec      rd      Disc scalelength (2)
  65- 70  F6.3 10+11solMass/arcsec2 Sd  Central surface mass density of disc
  72- 75  F4.2  arcsec      Re      Einstein radius of the bulge and disc
  77- 81  F5.3  ---         fe      Bulge fraction (B/T) mass ratio as measured
                                     at the Einstein radius Re (Bulge and disc)
  83- 87  F5.3  ---         ft      
[****UnclosedBrace??****]B/T mass ratio as measured at R->{infinity)}
                                     (Bulge and disc) (3)

Note (1): The values for <Ih>, rh and <Ihd> are taken directly from
    Kelson et al. (2000ApJ...531..137K).
Note (2): The disc scalelength rd is related to the half-light radius
    as given in Kelson et al. (2000ApJ...531..137K) by rd=1.688rhd. 
    In a cosmology with Ω_Λ_=0.7, Ω_M_=0.3 and
    H_0_=50km/s/Mpc, 1 arcsec corresponds to 6.6kpc at a redshift of
    z=0.33
Note (3): R is the radius of the circular region contained the
    projected mass directly measured with gravitational lensing.


[****ClosingBrace(s)Inserted****]
  * 07-Nov-2003: From electronic version of the journal
  * 09-Oct-2004: Galaxy numbered [FFF98] 423 was a typo, the correct
           galaxy number is 433.
(End)                       James Marcout, Patricia Vannier [CDS]    07-Nov-2003