Access to Astronomical Catalogues

J/ApJS/94/461       The Hawai K-band survey. III. (Songaila+ 1994)
The Hawai K-band survey. III. Spectroscopy of K < 20 galaxies.
    Songaila A., Cowie L.L., Hu E.M., Gardner J.P.
   <Astrophys. J. Suppl. Ser. 94, 461 (1994)>
   =1994ApJS...94..461S
ADC_Keywords: Galaxies, photometry ; Photometry, infrared ; Redshifts ;
              Spectroscopy
Keywords: cosmology: observations - galaxies: distances and redshifts -
          galaxies: evolution - infrared: galaxies - surveys

Abstract:
    We present spectra and multicolor (B,I,K) data for near-infrared (K)
    selected spatially complete magnitude limited (K<20) galaxy samples
    from the Hawaii Survey. The redshift identification of the sample of
    298 galaxies is substantially complete to a B magnitude of 26 and an I
    magnitude of 22.5, and identification of observed galaxies ranges from
    nearly 100% completeness at K<18 to ∼70% completeness at K=19-20. We
    note that many of the unidentified objects appear to be red (I-K)
    objects which are flat in the optical and spectroscopically
    featureless. Strengths of spectral-line features and breaks are
    tabulated for the 262 galaxies with reasonably secure redshifts. The
    measured redshifts nearly all fall at z<1, with the exception of a
    compact absorption-line object at z=2.35. At K≥18, the redshift
    distribution is well fitted by a model with no luminosity evolution,
    implying that from the K-band Hubble diagram, the Hubble constant can
    vary at most by 10% over the redshift range from z∼0.025 to 0.25, and
    that positive luminosity evolution at any significant level between
    z=0 and z=1 is ruled out. However, the evolution of both the
    emission-line strengths and the 4000Å break indicates that galaxies
    were undergoing significantly more star formation at z=1 than at the
    present time.

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table3.dat        46      298   Redshift catalog for all fields sorted by
                                  K magnitude
table5.dat        44       10   Redshift distribution with K magnitude
table6.dat        61      298   Spectral features and breaks


Byte-by-byte Description of file: table3.dat

   Bytes Format Units   Label     Explanations

   1-  3  I3    ---     No        Sequential number
       4  A1    ---     ---       [-]
   5-  7  A3    ---     Note      Original redshift (1)
   9- 10  I2    ---     Field     Observed field number
  12- 16  I5    arcsec  xpos      Offset of the galaxy form the field center in
                                   x coordinate (East to the left)
  18- 22  I5    arcsec  ypos      Offset of the galaxy form the field center in
                                   y coordinate (North to the top)
  24- 27  F4.1  mag     Kmag      K magnitude
  29- 32  F4.1  mag     Imag      ? I magnitude
  34- 37  F4.1  mag     Bmag      ? B magnitude
  39- 44  F6.4  ---     z         ? Measured redshift
      45  A1    ---     u_z       Uncertainty flag on  z
      46  A1    ---     n_z       [n] n: object not identified

Note (1): Redshifts which are taken from the literature are marked by the
           object number according to the following code:
     LCG (Lilly, Cowie & Gardner, 1991ApJ...369...79L),
     CSH (Cowie, Songaila, & Hu, 1991Natur.354..460C),
     L   (Lilly, 1993ApJ...411..501L),
     C   (Cowie et al., 1994ApJ...434..114C).
     No spectra are given for these objects in Fig.3.


Byte-by-byte Description of file: table5.dat

   Bytes Format Units   Label     Explanations

   1-  2  I2    mag     Kmin      Minimum K magnitude for K interval
   4-  5  I2    mag     Kmax      Maximum K magnitude for K interval
   7-  8  I2    ---     NTot      Number of total galaxies
  10- 11  I2    ---     NObs      Number of spectroscopically observed galaxies
  13- 14  I2    ---     NID       Number of identified galaxies
  16- 20  F5.3  ---     zmean     Mean redshift of identified galaxies
  22- 26  F5.3  ---     e_zmean   rms uncertainty on zmean
  28- 32  F5.3  ---     Zmed      Median redshift of all observed galaxies
  34- 38  F5.3  ---     zmedl     Lower median redshift error bar
  40- 44  F5.3  ---     zmedh     Higher median redshift error bar


Byte-by-byte Description of file: table6.dat

   Bytes Format Units   Label     Explanations

   1-  3  I3    ---     No        Sequential number
   5-  8  F4.1  mag     Kmag      K magnitude
  10- 14  F5.3  ---     z         ? Redshift
      15  A1    ---     u_z       Uncertainty flag on z
      16  A1    ---     n_z       [n] n: no id
  18- 20  F3.1  ---     Break     ? Strength of the 4000A break
  22- 25  F4.1  ---     Mg        ? Mgb index
  27- 31  F5.1  0.1nm   Na        ? NaD line rest frame equivalent width
  33- 37  F5.1  0.1nm   GBand     ? G band rest frame equivalent width
  39- 43  F5.1  0.1nm   Halpha    ? Hα + [N II] complex rest frame equivalent
                                  width
  45- 48  F4.1  0.1nm   Hbeta     ? Hβ line rest frame equivalent width
  50- 54  F5.1  0.1nm   [OII]     ? [O II]λ3727 rest frame equivalent width
  56- 60  F5.1  0.1nm   [OIII]    ? [O III]λ5007 rest frame equivalent width


History: Prepared via OCR at CDS.


References:
   Cowie et al., Paper I                      1994ApJ...434..114C
   Huang et al., Paper II                     1997ApJ...476...12H
(End)                           James Marcout, Patricia Bauer [CDS]  11-Jul-1997