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J/A+A/485/657    Physical parameters of Wolf-Rayet galaxies  (Brinchmann+, 2008)
Galaxies with Wolf-Rayet signatures in the low-redshift Universe.
A survey using the Sloan Digital Sky Survey.
    Brinchmann J., Kunth D., Durret F.
   <Astron. Astrophys. 485, 657 (2008)>
   =2008A&A...485..657B
ADC_Keywords: Galaxies, spectra ; Abundances ; Equivalent widths

Keywords: stars: Wolf-Rayet - galaxies: abundances - galaxies: evolution -
          galaxies: starburst - galaxies: fundamental parameters

Abstract:
    The availability of large spectroscopic datasets has opened up the
    possibility of constructing large samples of rare objects in a
    systematic manner.

    The goal of this study is to analyse the properties of galaxies
    showing Wolf-Rayet features in their optical spectrum using spectra
    from the Sloan Digital Sky Survey Release 6. With this unprecedentedly
    large sample we aim to constrain the properties of the Wolf-Rayet
    phase and its impact on the surrounding interstellar medium.

    We carried out very careful continuum subtraction on all galaxies with
    equivalent widths of Hβ>2Å in emission and identify Wolf-Rayet
    features using a mixture of automatic and visual classification. We
    combined this with spectroscopic and photometric information from the
    SDSS and derive metal abundances using a number of methods.

Description:
    These catalogues are for tables 3-5 from the paper and contain
    positional and physical parameters for the Wolf-Rayet galaxies
    identified in the study.

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table3.dat       103      570   Positional parameters of Wolf-Rayet galaxies
table4.dat        90      450   Abundance estimates
table5.dat        93      570   Physical parameters


See also:
   J/A+AS/136/35 : WR galaxies and HII regions catalog (Schaerer+ 1999)
   http://www.sdss.org : SDSS Home Page


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

   Bytes Format Units   Label     Explanations

   1-  2  A2    ---     ---       [WR]
   4-  6  I03   ---     WR        Running ID (WR NNN)
   8- 15  F8.5  ---     z         Galaxy redshift
      17  I1    ---     Sc1       [0/1] SciencePrimary (1)
  19- 20  I2    h       RAh       Right ascension (J2000)
  22- 23  I2    min     RAm       Right ascension (J2000)
  25- 29  F5.2  s       RAs       Right ascension (J2000)
      31  A1    ---     DE-       Declination sign (J2000)
  32- 33  I2    deg     DEd       Declination (J2000)
  35- 36  I2    arcmin  DEm       Declination (J2000)
  38- 42  F5.2  arcsec  DEs       Declination (J2000)
      44  I1    ---     Cl        [2/3] WR classification (2)
  46- 50  A5    ---     BPT       BPT class (3)
  52- 65  A14   ---     SpecID    Spectrum ID (4)
  67- 72  I6    ---     GInd      Garching ID (5)
  74-103  A30   ---     OName     Alternative name

Note (1): The SCIENCEPRIMARY key from the SDSS. In the paper only
     spectra with SCIENCEPRIMARY = 1 are used in most plots.
Note (2): The WR classification is 3 for secure WR galaxies and 2 for
     somewhat less secure systems.
Note (3): The BPT class is determined on the basis of the Baldwin, Phillips
     & Terlevich (1981PASP...93....5B) excitation diagram, as follows:
      SF = Star-Forming galaxies
    Comp = Composite galaxies, intermediate between the SF and AG classes
     AGN = Active Galaxy Nuclei class
   Uncl. = unclassified
Note (4): Composed of the SDSS plateID, MJD and fiberID.

Note (5): This is the index into the SDSS datafiles provided at the
          http://www.mpa-garching.mpg.de/SDSS site.


Byte-by-byte Description of file: table4.dat

   Bytes Format Units  Label   Explanations

   1-  2  A2    ---    ---     [WR]
   4-  6  I03   ---    WR      Running ID (WR NNN)
   8- 12  F5.2  ---    O(MIX)  ?=-9.99 12+LogO/H with mixed abundance estimate
  14- 18  F5.2  ---  e_O(MIX)  ?=-1.00 Estimated error for OHMIX
  20- 24  F5.2  ---    O(Te)   ?=-9.99 12+LogO/H from T_e_ method (1)
  26- 30  F5.2  ---   e_O(Te)  ?=-1.00 Estimated error for OH_Te
  32- 36  F5.2  ---    O(PP)   12+LogO/H from PP method (2)
  38- 42  F5.2  ---   e_O(PP)  Estimated error for OH_PP
  44- 48  F5.2  ---   O(CL01)  ?=-9.99 12+LogO/H from CL01 method (3)
  50- 54  F5.2  --- e_O(CL01)  ?=-1.00 Estimated error for OHCL01
  56- 60  F5.2  ---    N       ?=-9.99 12+LogN/H from T_e_ method (1)
  62- 66  F5.2  ---    e_N     ?=-1.00 Estimated error for NH
  68- 72  F5.2  ---    Ar      ?=-9.99 12+LogAr/H from T_e_ method (1)
  74- 78  F5.2  ---    e_Ar    ?=-1.00 Estimated error for ArH
  80- 84  F5.2  ---    Ne      ?=-9.99 12+LogNe/H from T_e_ method (1)
  86- 90  F5.2  ---    e_Ne    ?=-1.00 Estimated error for NeH

Note (1): The abundances are calculated using the Izotov et al. (2006,
     Cat. J/A+A/448/955) fitting formulae for the Te method.
Note (2): The abundances were calculated using the N2 method of Pettini &
     Pagel (2004MNRAS.348L..59P)
Note (3): The abundances were calculated using the Charlot & Longhetti
     (2001MNRAS.323..887C) models using the method described in Brinchmann
     et al. (2004MNRAS.351.1151B).


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

   Bytes Format Units   Label     Explanations

   1-  2  A2    ---     ---       [WR]
   4-  6  I03   ---     WR        Running ID (WR NNN)
   8- 12  F5.2  [W]     LBBobs    Observed Blue bump luminosity
  14- 18  F5.2  [W]     e_LBBobs  Estimated error for LBBobs
  20- 24  F5.2  [W]     LRBobs    ?=-9.00 Observed Red bump luminosity
  26- 30  F5.2  [W]     e_LRBobs  ?=-1.00 Estimated error for LRBobs
  32- 36  F5.2  [W]     LBB0      ?=-9.00 Dereddened Blue bump luminosity
  38- 42  F5.2  [W]     e_LBB0    ?=-1.00 Estimated error for LBBdred
  44- 48  F5.2  [W]     LRB0      ?=-9.00 Dereddened Red bump luminosity
  50- 54  F5.2  [W]     e_LRB0    ?=-1.00 Estimated error for LRBdred
  56- 61  F6.2  0.1nm   EWBB      ?=-99.99 Equivalent width of the blue bump
  63- 67  F5.2  0.1nm   e_EWBB    ?=-1.00  Estimated error for EWBB
  69- 74  F6.2  0.1nm   EWRB      ?=-99.99 Equivalent width of the red bump
  76- 80  F5.2  0.1nm   e_EWRB    ?=-1.00  Estimated error for EWRB
  82- 87  F6.2  0.1nm   WHeII     Gaussian width of broad HeII 4686 (1)
  89- 93  F5.2  0.1nm   e_WHeII   ?=-1.000e+00 Error on sigHeII (1)

Note (1): If the error is less than zero then the width hit an upper fixed
     limit and no error estimate could be given.


Acknowledgements:
    Jarle Brinchmann, jarle(at)strw.leidenuniv.nl

History:
  * 06-May-2008: Original version
  * 11-Aug-2008: table5 reformatted
(End) Jarle Brinchmann [Leiden Observatory], Patricia Vannier [CDS]  06-May-2008