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J/A+A/YYY/XXX    Metal-rich extragalactic H II regions  (Bresolin+, 2005)
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A VLT study of metal-rich extragalactic H II regions. 
      I. Observations and empirical abundances.
       Bresolin, F., Schaerer, D., Gonzalez Delgado, R.M. and Stasinska, G.
      <Astron. Astrophys. YYY, XXX (2005)>
      =2005A&A...YYY..XXXK
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ADC_Keywords: Abundances; Galaxies, optical; H II regions; Spectroscopy

Keywords: galaxies: abundances - galaxies: ISM - galaxies: stellar content

Abstract:
    We have obtained spectroscopic observations from 3600 A to 9200 A
    with FORS at the Very Large Telescope for approximately 70 H II
    regions located in the spiral galaxies NGC 1232, NGC 1365, NGC
    2903, NGC 2997 and NGC 5236. These data are part of a project
    aiming at measuring the chemical abundances and characterizing the
    massive stellar content of metal-rich extragalactic H II
    regions. In this paper we describe our dataset, and present
    emission line fluxes for the whole sample. In 32 H II regions we
    measure at least one of the following auroral lines: [S II]4072,
    [N II]5755, [S III]6312 and [O II]7325. From these we derive
    electron temperatures, as well as oxygen, nitrogen and sulphur
    abundances, using classical empirical methods (both so-called
    "Te-based methods" and "strong line methods").  Under the
    assumption that the temperature gradient does not introduce severe
    biases, we find that the most metal-rich nebulae with detected
    auroral lines are found at 12+log(O/H)~8.9, i.e. about 60% larger
    than the adopted solar value. However, classical abundance
    determinations in metal-rich H II regions may be severely biased
    and must be tested with realistic photoionization models. The
    spectroscopic observations presented in this paper will serve as a
    homogeneous and high-quality database for such purpose.

Description:
    Tables 5-9 present the dereddened nebular emission line fluxes
    measured for H II regions in the galaxies NGC 1232, NGC 1365, NGC
    2903, NGC 2997 and NGC 5236.


File Summary:
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 FileName      Lrecl    Records    Explanations
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ReadMe            80          .   This file
table5.dat       223         13   Nebular emission line fluxes: NGC 1232
table6.dat       223         15   Nebular emission line fluxes: NGC 1365
table7.dat       223          9   Nebular emission line fluxes: NGC 2903
table8.dat       223         14   Nebular emission line fluxes: NGC 2997
table9.dat       223         18   Nebular emission line fluxes: NGC 5236
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Byte-by-byte Description of file: table5.dat table6.dat table7.dat table8.dat
                                  table9.dat
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   Bytes Format Units   Label    Explanations
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   1-  3  A3    ---     Object   H II region name
   4-  9  F6.0  ---     3727     OII (3727A) flux (1) (2)
  10- 13  F4.0  ---     e_3727   Uncertainty in OII
  14- 19  F6.1  ---     3869     NeIII (3869A) flux (1)
  20- 24  F5.1  ---     e_3869   Uncertainty in NeIII
  25- 29  F5.0  ---     4101     Hdelta (4101A) flux (1)
  30- 33  F4.0  ---     e_4101   Uncertainty in Hdelta
  34- 39  F6.2  ---     4072     SII (4072A) flux (1)
  40- 44  F5.2  ---     e_4072   Uncertainty in SII
  45- 49  F5.0  ---     4340     Hgamma (4340A) flux (1)
  50- 53  F4.0  ---     e_4340   Uncertainty in Hgamma
  54- 58  F5.1  ---     4471     HeI (4471A) flux (1)
  59- 63  F5.1  ---     e_4471   Uncertainty in HeI
  64- 69  F6.0  ---     4959     OIII (4959A) flux (1)
  70- 73  F4.0  ---     e_4959   Uncertainty in OIII
  74- 79  F6.0  ---     5007     OIII (5007A) flux (1)
  80- 83  F4.0  ---     e_5007   Uncertainty in OIII
  84- 89  F6.2  ---     5200     NI (5200A) flux (1)
  90- 95  F6.2  ---     e_5200   Uncertainty in NI
  96-100  F5.2  ---     5755     NII (5755A) flux (1)
 101-105  F5.2  ---     e_5755   Uncertainty in NII
 106-110  F5.1  ---     5876     HeI (5876A) flux (1)
 111-115  F5.1  ---     e_5876   Uncertainty in HeI
 116-120  F5.1  ---     6300     OI (6300A) flux (1)
 121-125  F5.1  ---     e_6300   Uncertainty in OI
 126-131  F6.2  ---     6312     SIII (6312A) flux (1)
 132-137  F6.2  ---     e_6312   Uncertainty in SIII
 138-142  F5.0  ---     6548     NII (6548A) flux (1)
 143-146  F4.0  ---     e_6548   Uncertainty in NII
 147-151  F5.0  ---     6563     Halpha (6563A) flux (1)
 152-156  F5.0  ---     e_6563   Uncertainty in Halpha
 157-162  F6.0  ---     6583     NII (6583A) flux (1)
 163-166  F4.0  ---     e_6583   Uncertainty in NII
 167-171  F5.1  ---     6678     HeI (6678A) flux (1)
 172-176  F5.1  ---     e_6678   Uncertainty in HeI
 177-181  F5.0  ---     6716     SII (6716A) flux (1)
 182-185  F4.0  ---     e_6716   Uncertainty in SII
 186-190  F5.0  ---     6731     SII (6731A) flux (1)
 191-194  F4.0  ---     e_6731   Uncertainty in SII
 195-199  F5.1  ---     7135     ArIII (7135A) flux (1)
 200-204  F5.1  ---     e_7135   Uncertainty in ArIII
 205-209  F5.1  ---     7325     OII (7325A) flux (1)
 210-214  F5.1  ---     e_7325   Uncertainty in OII
 215-219  F5.0  ---     9069     SIII (9069A) flux (1)
 220-223  F4.0  ---     e_9069   Uncertainty in SIII
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Note (1): Line fluxes given in units of Hbeta = 100.
     (2): lower limit for object 05 in NGC 5236
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(End)                            Fabio Bresolin [IfA, Hawaii]        15-Aug-2005
