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J/AJ/122/611    Caltech Faint Galaxy Redshift Survey. XV. (van den Bergh+, 2001)
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Caltech Faint Galaxy Redshift Survey. XV.
 Classifications of galaxies with 0.2<Z<1.1 in the Hubble Deep Field North and
 its flanking fields.
    van den Bergh S., Cohen J.G., Crabbe C.
   <Astron. J. 122, 611 (2001)>
   =2001AJ....122..611V
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ADC_Keywords: Galaxy catalogs ; Redshifts ; Magnitudes ; Morphology
Keywords: galaxies: evolution - galaxies: formation - surveys

Abstract:
    To circumvent the spatial effects of resolution on galaxy
    classification, the images of 233 objects of known redshift in the
    Hubble Deep Field (HDF) and its flanking fields that have redshifts in
    the range 0.20<z<1.10 were degraded to the resolution that they would
    have had if they were all located at a redshift of z=1.00. As in Paper
    XIV (Cat. <J/AJ/120/2190>) of the present series, the effects of
    shifts in rest wavelength were mitigated by using R-band images for
    the classification of galaxies with 0.2<z<0.6 and I-band images for
    objects with redshifts 0.6<z<1.1. A special effort was made to search
    for bars in distant galaxies. The present data strongly confirm the
    previous conclusion that the Hubble tuning fork diagram only provides
    a satisfactory framework for the classification of galaxies with
    z<0.3. More distant disk galaxies are often difficult to shoehorn into
    the Hubble classification scheme. The paucity of barred spirals and
    grand-design spirals at large redshifts is confirmed. It is concluded
    that the morphology of disk galaxies observed at look-back times
    smaller than 3-4Gyr differs systematically from that of more distant
    galaxies viewed at look-back times of 4-8Gyr. The disks of late-type
    spirals at z>0.5 are seen to be more chaotic than those of their
    nearer counterparts. Furthermore, the spiral structure in distant
    early-type spirals appears to be less well developed than it is in
    nearby early galaxies.

File Summary:
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 FileName      Lrecl  Records   Explanations
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ReadMe            80        .   This file
table1.dat       100      227   Classifications of Galaxies
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See also:
  J/ApJS/127/1 : UGRK Photometry in the Hubble Deep field region (Hogg+, 2000)
  J/ApJ/538/29 : Caltech Faint Galaxy Redshift Survey. X (Cohen+, 2000)
 J/AJ/121/2895 : Caltech Faint Galaxy Redshift Survey. XIII (Cohen 2001)
 J/AJ/120/2190 : Caltech Faint Galaxy Redshift Survey. XIV (van den Bergh+ 2000)

Byte-by-byte Description of file: table1.dat
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   Bytes Format Units   Label     Explanations
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   1- 11  A11   ---     [CHB2000] Galaxy identification (1)
  13- 17  F5.3  ---     z         Redshift from Cohen et al.
                                   (2000, Cat. <J/ApJ/538/29>) or
                                   Cohen (2001, Cat. <J/AJ/121/2895>)
  19- 23  F5.2  mag     Rmag      The R band magnitude from Hogg et al.
                                   (2000, Cat. <J/ApJS/127/1>)
  25- 36  A12   ---     MType     Galaxy morphological classification
  38-100  A63   ---     Com       Comments
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Note (1): Names are Hmmsss_MMSS for objects in the HDF, where the object's
          J2000 coordinates are 12 mm ss.s +62 MM SS.  The initial letter is
          ``F'' for objects in the flanking fields.
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History:
    From electronic version of the journal

References:
  Cohen et al.,         Paper VII    1999ApJS..120..171C
  Cohen et al.,         Paper VIII   1999ApJ...512...30C
  Hogg et al.,          Paper IX     2000ApJS..127....1H, Cat. <J/ApJS/127/1>
  Cohen et al.,         Paper X      2000ApJ...538...29C, Cat. <J/ApJ/538/29>
  Carlberg et al.,      Paper XI     2000ApJ...532L...1C
  Hogg et al.,          Paper XII    2000ApJ...545...32H
  Cohen,                Paper XIII   2001AJ....121.2895C, Cat. <J/AJ/121/2895>
  Van den Bergh et al., Paper XIV    2000AJ....120.2190V  Cat. <J/AJ/120/2190>
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(End)                    Greg Schwarz [AAS], Patricia Bauer [CDS]    12-Nov-2001