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J/MNRAS/330/75    Chemical abundances in UV-selected galaxies   (Contini+, 2002)
Chemical abundances in a UV-selected sample of galaxies.
    Contini T., Treyer M.A., Sullivan M., Ellis R.S.
   <Mon. Not. R. Astron. Soc. 330, 75 (2002)>
   =2002MNRAS.330...75C
ADC_Keywords: Photometry, ultraviolet ; Redshifts ; Spectroscopy ; Abundances

Keywords: galaxies: abundances - galaxies: evolution - galaxies: starburst -
          ultraviolet: galaxies

Abstract:
    We discuss the chemical properties of a sample of UV-selected
    intermediate-redshift (0≤z≤0.4) galaxies in the context of their
    physical nature and star-formation history. This work represents an
    extension of our previous studies of the rest-frame UV-luminosity
    function (Treyer et al., 1998, Cat. J/MNRAS/300/303) and the
    star-formation properties of the same sample (Sullivan et al., 2000,
    Cat. J/MNRAS/312/442). We revisit the optical spectra of these
    galaxies and perform further emission-line measurements restricting
    the analysis to those spectra with the full set of emission lines
    required to derive chemical abundances. Our final sample consists of
    68 galaxies with heavy-element abundance ratios and both UV and CCD
    B-band photometry.

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table1.dat       105       68   The sample of UV-selected galaxies with
                              measurements of chemical abundances, part 1
table2.dat        65       68   The sample of UV-selected galaxies with
                              measurements of chemical abundances, part 2


See also:
    J/MNRAS/300/303 : UV-selected galaxy redshift survey. I. (Treyer+, 1998)
    J/MNRAS/312/442 : UV-selected galaxy redshift survey. II. (Sullivan+, 2000)


Byte-by-byte Description of file: table1.dat

   Bytes Format Units   Label         Explanations

   1-  2  I2    ---     [CTS2002]     [1/68] Sequential number
   4-  5  I2    h       RAh           Right ascension (1950)
   7-  8  I2    min     RAm           Right ascension (1950)
  10- 14  F5.2  s       RAs           Right ascension (1950)
      16  A1    ---     DE-           Declination sign (1950)
  17- 18  I2    deg     DEd           Declination (1950)
  20- 21  I2    arcmin  DEm           Declination (1950)
  23- 26  F4.1  arcsec  DEs           Declination (1950)
      28  A1    ---     OCs           Number of optical counterparts in the
                                       POSS plates within 10"
  30- 34  F5.2  ---     [OIII]/[OII]  Emission-line ratio [OIII]/[OII]
  36- 39  F4.2  ---   e_[OIII]/[OII]  rms uncertainty on [OIII]/[OII]
  41- 45  F5.2  ---     [OIII]/Hbeta  Emission-line ratio [OIII]/Hβ
  47- 50  F4.2  ---   e_[OIII]/Hbeta  rms uncertainty on [OIII]/Hβ
  52- 56  F5.2  ---     [NII]/Halpha  Emission-line ratio [NII]/Hα
  58- 61  F4.2  ---   e_[NII]/Halpha  rms uncertainty on [NII]/Hα
  63- 67  F5.2  ---     [SII]/Halpha  ? Emission-line ratio [SII]/Hα
  69- 72  F4.2  ---   e_[SII]/Halpha  ? rms uncertainty on [SII]/Hα
  74- 78  F5.2  ---     [NII]/[OII]   Emission-line ratio [NII]/[OII]
  80- 83  F4.2  ---    e_[NII]/[OII]  rms uncertainty on [NII]/[OII]
  85- 88  F4.2  ---     log(R23)      R23 = ([OII]3727+[OIII]4959,5007)/Hβ
  90- 93  F4.2  ---     e_log(R23)    rms uncertainty on log(R23)
      95  A1    ---     Note          [UL?] Flag (1)
  97-100  F4.2  ---     O/HL          Oxygen abundance, 12+log(O/H),
                                       on the lower branch (2)
 102-105  F4.2  ---     O/HU          Oxygen abundance, 12+log(O/H),
                                       on the upper branch (2)

Note (1): Flag indicating if the object lies on the lower (L) or
    in the upper (U) branch of the O/H versus R23 relationship, or falls
    in the turnaround region (?).
Note (2): Oxygen abundances derived from the empirical calibrations
          (McGaugh, 1991ApJ...380..140M)


Byte-by-byte Description of file: table2.dat

   Bytes Format Units   Label        Explanations

   1-  2  I2    ---     [CTS2002]    [1/68] Sequential number
   4-  5  I2    h       RAh          Right ascension (1950)
   7-  8  I2    min     RAm          Right ascension (1950)
  10- 14  F5.2  s       RAs          Right ascension (1950)
      16  A1    ---     DE-          Declination sign (1950)
  17- 18  I2    deg     DEd          Declination (1950)
  20- 21  I2    arcmin  DEm          Declination (1950)
  23- 26  F4.1  arcsec  DEs          Declination (1950)
      28  A1    ---     OCs          Number of optical counterparts in the
                                      POSS plates within 10"
  30- 34  F5.3  ---     z            Redshift
  36- 39  F4.2  mag     AV           Extinction coefficient in V band
  41- 44  F4.2  mag     e_AV         rms uncertainty on AV
  46- 49  F4.2  ---     12+log(O/H)  12+log(O/H) abundance ratio
  51- 54  F4.2  ---   e_12+log(O/H)  rms uncertainty on 12+log(O/H)
  56- 60  F5.2  ---     log(N/O)     log(N/O) abundance ratio
  62- 65  F4.2  ---     e_log(N/O)   rms uncertainty on log(N/O)


History:
    From electronic version of the journal
(End)                         James Marcout, Patricia Bauer [CDS]    28-Mar-2002